CA2484686A1 - Oxidation resistant rhenium alloys - Google Patents
Oxidation resistant rhenium alloys Download PDFInfo
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- CA2484686A1 CA2484686A1 CA002484686A CA2484686A CA2484686A1 CA 2484686 A1 CA2484686 A1 CA 2484686A1 CA 002484686 A CA002484686 A CA 002484686A CA 2484686 A CA2484686 A CA 2484686A CA 2484686 A1 CA2484686 A1 CA 2484686A1
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- rhenium
- alloy
- oxidation
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- alloys
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/008—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression characterised by the composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
An alloy based on a refractory metal such as rhenium resists oxidation by th e inclusion of alloying substances with affinity for oxygen or other oxidizing substances. This alloy has excellent high temperature strength and will resi st oxidation. The alloy includes oxidation resistant substances, such as solubl e metals, that attract oxygen and may form a protective oxide layer over the remaining portion of the rhenium-alloy part or piece. Such soluble alloying constituents may include chromium, cobalt, nickel, titanium, thorium, aluminum, hafnium, vanadium, silicon, aluminum, and yttrium.
Description
OXIDATION RESISTANT RHENIUM ALLOYS
BACKGROUND OF THE INVENTION
s Field of the Invention This invention relates to wear-resistant materials and more particularly to wear-resistant alloys derived from refractory metals such as rhenium.
1o Description of the Related Art Material scientists seek to exploit from available resources, namely those elements of the periodic table of elements, different materials having different characteristics that can be used for a variety of purposes and applications. Consequently, there is a great interest in developing Is conductors, insulators, soft materials, and hard materials from available substances and materials.
With respect to engines and mechanical components, wear resistance is typically a desired characteristic because it allows materials to last a longer time and users to consequently enjoy a cheaper cost per 2o unit time or reduced operational costs. Even though a part may cost twice as much, it may last four times as long so is then approximately half as expensive as a cheaper part over a given time period.
One particularly useful metal is elemental rhenium. Rhenium has atomic number 75 in the periodic table of elements. It is known as a refractory metal which means it has a very high melting point as Compared to other materials. Despite the fact that it has a very high melting point, rhenium is not necessarily wear-resistant. Rhenium metal melts at approximately 5756° F (3180° C, 3453° Kelvin). However, rhenium begins s to oxidize at a much lower temperature, of approximately 1000° F
(538° C, 811 ° K). Rhenium retains excellent ultrahigh temperature strength of approximately 6 - 9 Ksi (kips per square inch, 1000 pounds per square inch) at 4000° F (2204° C, 2477° K). Far before it reaches this temperature, the oxidation temperature of rhenium becomes a factor and ,, to the oxidation of rhenium produces a volatile oxide that will continually evaporate from the surface of the rhenium part until the part has entirely vaporized.
This can lead to catastrpphic failure as can be readily perceived as the evaporation of a part during operation would be much like the boiling Is away of a part made of dry ice. However, where oxygen is lacking, rhenium has been shown to retain high strength and to resist severe corrosion and wear both in established literature as well as independent tests. Such properties are present at room temperature operation and remain with rhenium even though the temperatures are elevated.
2o In prior literature, relevant alloying includes development of phase diagrams for several binary alloys of rhenium as well as rhenium-enhanced alloys such ~s those based on tungsten where rhenium is added to the matrix to enhance resulting properties. In such prior literature, rhenium has been a part of binary alloys such as in tungsten to increase ductility.
Rhenium has also been studied for its effect on chromium-based alloys. For steel, alloys with chromium are known that alloy the creation of s "stainless steel." When alloyed with chromium in amounts greater than 11 %, steel converts from a highly oxidation prone substance to a more corrosion-resistant alloy with the general elimination of rust. Similar concepts are known for use in "super alloys" and corrosion-resistive alloys.
However, the prior art does not well reflect the establishment of to oxidation-resistant rhenium-based alloy. Consequently, as there is always a need for better materials and materials having better wear characteristics, the present invention provides a solution to a need that will always be felt for better materials.
Additionally, the art has not well addressed the wear that is concentrates at small asperities which are microscopic metal protrusions that generally cause roughness on a surface such as a cast or focused metal. With respect to rhenium-based alloys, wear could be focused on such asperities and such wear would by friction create significant heat that would cause an alloyed rhenium to oxidize and vaporize.
BACKGROUND OF THE INVENTION
s Field of the Invention This invention relates to wear-resistant materials and more particularly to wear-resistant alloys derived from refractory metals such as rhenium.
1o Description of the Related Art Material scientists seek to exploit from available resources, namely those elements of the periodic table of elements, different materials having different characteristics that can be used for a variety of purposes and applications. Consequently, there is a great interest in developing Is conductors, insulators, soft materials, and hard materials from available substances and materials.
With respect to engines and mechanical components, wear resistance is typically a desired characteristic because it allows materials to last a longer time and users to consequently enjoy a cheaper cost per 2o unit time or reduced operational costs. Even though a part may cost twice as much, it may last four times as long so is then approximately half as expensive as a cheaper part over a given time period.
One particularly useful metal is elemental rhenium. Rhenium has atomic number 75 in the periodic table of elements. It is known as a refractory metal which means it has a very high melting point as Compared to other materials. Despite the fact that it has a very high melting point, rhenium is not necessarily wear-resistant. Rhenium metal melts at approximately 5756° F (3180° C, 3453° Kelvin). However, rhenium begins s to oxidize at a much lower temperature, of approximately 1000° F
(538° C, 811 ° K). Rhenium retains excellent ultrahigh temperature strength of approximately 6 - 9 Ksi (kips per square inch, 1000 pounds per square inch) at 4000° F (2204° C, 2477° K). Far before it reaches this temperature, the oxidation temperature of rhenium becomes a factor and ,, to the oxidation of rhenium produces a volatile oxide that will continually evaporate from the surface of the rhenium part until the part has entirely vaporized.
This can lead to catastrpphic failure as can be readily perceived as the evaporation of a part during operation would be much like the boiling Is away of a part made of dry ice. However, where oxygen is lacking, rhenium has been shown to retain high strength and to resist severe corrosion and wear both in established literature as well as independent tests. Such properties are present at room temperature operation and remain with rhenium even though the temperatures are elevated.
2o In prior literature, relevant alloying includes development of phase diagrams for several binary alloys of rhenium as well as rhenium-enhanced alloys such ~s those based on tungsten where rhenium is added to the matrix to enhance resulting properties. In such prior literature, rhenium has been a part of binary alloys such as in tungsten to increase ductility.
Rhenium has also been studied for its effect on chromium-based alloys. For steel, alloys with chromium are known that alloy the creation of s "stainless steel." When alloyed with chromium in amounts greater than 11 %, steel converts from a highly oxidation prone substance to a more corrosion-resistant alloy with the general elimination of rust. Similar concepts are known for use in "super alloys" and corrosion-resistive alloys.
However, the prior art does not well reflect the establishment of to oxidation-resistant rhenium-based alloy. Consequently, as there is always a need for better materials and materials having better wear characteristics, the present invention provides a solution to a need that will always be felt for better materials.
Additionally, the art has not well addressed the wear that is concentrates at small asperities which are microscopic metal protrusions that generally cause roughness on a surface such as a cast or focused metal. With respect to rhenium-based alloys, wear could be focused on such asperities and such wear would by friction create significant heat that would cause an alloyed rhenium to oxidize and vaporize.
In view of the foregoing disadvantages inherent in the known types of alloys and materials now present in the prior art, there is a need fQr wear-resistant rhenium-based alloys for use in environments where unalloyed or pure rhenium would be subject to oxidation and/or s vaporization.
SUMMARY OF TFIE INWENTION
The present invention provides a family of new wear-resistant rhenium-based alloys for use in environments where unalloyed or pure to rhenium would be subject to oxidation and/or vaporization.
The general purpose of the present invention, which will be described subsequently in greater detail, is to provide better materials for use in mechanically or otherwise stressful operating environments in order to provide better wear characteristics and function~which are not is anticipated, rendered obvious, suggested, or even implied by any of the prior art alloys, either alone or in any combination thereof.
By way of example only, the present invention is embodied in an alloy that has a refractory metal, particularly rhenium, that is subject to oxidation well below its melting point and well below the temperature at 2o which it loses strength and may strengthen the metal by selective combination. This results in an alloy that better resists oxidation and that may have better (and at least as good) wear characteristics. The refractory metal is combined with ether alloying materials, such as metals, that have a strong affinity for oxygen. Such alloying materials include the metals chromium, cobalt, nickel, titanium, thorium, aluminum, hafnium, and related elements on the periodic table. These particular elements are at least somewhat soluble in rhenium, if not completely soluble.
s It is believed that such elements protect rhenium by forming an oxide on its surface. Once the oxide has formed on the surface of the alloyed part, further attack by oxygen is prevented by the oxide coating.
This is a phenomenon that is well-known with aluminum that oxidizes in oxygen, but once the surface of an aluminum object has oxidized, further io oxidation is prevented as oxygen cannot get to the unoxidized aluminum below the oxidized surtace layer. Stainless steel also exhibits similar characteristics.
Consequently, those metals or other alloying agents that oxidize to form high boiling point oxides may well aid in the protection of the is underlying rhenium alloy.
lJsing powder metallurgy, and possibly using free form fabrication (FFF) or casting, parts and components can be fabricated from rhenium-based alloys having oxygen-attracting qualities. The use of such techniques may render useful alloys with better wear and lower oxidation 2o characteristics. Other features and advantages of the present invention will become apparent from the following description of the preferred embodiments which illustrate by way of example the principles of the invention.
DESCRIPTIOiV ~F THE PREFERRED EMB~DIMENT(S) The detailed description set forth below in connection with the appended drawings is intended as a description of presently-preferred embodiments of the invention and is not intended to represent the only forms in which the present invention may be constructed and/or utilized.
The description sets forth the functions and the sequence of steps for constructing and operating the invention in connection with the illustrated embodiments. However, it is to be understood that the same or equivalent functions and sequences may be accomplished by different embodiments Io that are also intended to be encompassed within the spirit and scope of the invention.
One embodiment is achieved by initially obtaining some amount of pure rhenium in order to provide a better and unadulterated alloy.
Rhenium is a refractory metal and the process described herein may apply is to other refractory metals that require protection from oxidation in order to obtain better wear-resistant characteristics or otherwise.
The alloys set forth herein may be fabricated by powder metallurgy at relatively low pressures and temperatures for refractory metals, on the order of 3,000 - 4,000 psi (pounds per square inch) at approximately 20 1800°F (982°C, 1255.15°K) for rhenium. Alternatively, free form fabrication (FFF) or casting may also provide good results. This last option of casting is generally difficult and costly due to the very high melting temperature of rhenium. Additionally, due to the oxidation characteristics of rhenium, the ambient environment in which rhenium alloy is formed (as by powder metallurgy, free form fabrication, and/or casting) may need to be neutral, reducing, andlor under vacuum in order to avoid oxidation. Practically, powder metallurgy and free form fabrication s techniques are believed to be the most effective.
In terms of atomic percent, an alloy (designated herein as HRA30) composed of 60% rhenium, 20% cobalt, 15% chromium, and 5%
magnesium has shown to lower the oxidation rate of pure rhenium by a factor of 10. Additional alloys using various percentages of cobalt, to chromium, manganese, nickel, vanadium, silicon, aluminum, yttrium, titanium, thorium, hafnium, or other elements may also be used either alone or in combination with each other. Other elements or substances with affinity for oxygen that produce oxidation-protective coating for the underlying rhenium or rhenium alloy are appropriate for use in order to ~s achieve the present invention. Additionally, such alloying substances are believed to be more effective if they are at least, if not completely, soluble in rhenium.
In one embodiment, a minimum of 50% rhenium atomic percent may be combined with cobalt in order to produce an alloy with desired 2o characteristics. The atomic percent of cobalt may range from approximately 0% to 50%. Additionally, chromium may be added in an amount ranging from approximately 10-15% by atomic percent.
In another embodiment, known in the trade as Honeywell Alloy HRA33, the atomic percentages are as follows: rhenium approximately 55%, cobalt approximately 20%, chromium approximately 10%, nickel approximately 10% and manganese approximately 5%.
The alloys created herein cannot only be used as material by which components or parts may be formed, but also as a coating under which rhenium or other core components could be protected from oxidation and/or to increase wear resistance in elevated temperature environments such as those arising in operating jet engines. Under such circumstances, matching of coefficients of thermal expansion may prove useful and further io research may be performed in this area. It is believed that those of ordinary skill in the art would not have to perform undue experimentation in order to achieve the alloys set forth herein in order to obtain the desired characteristics. Similarly, the same is also believed to be true for the use of the alloy of the present invention for coating underlying materials. For Is applications of the instant alloys as coatings, intermediate coatings may be used to enhance adhesion or otherwise between the outer alloy coating and the underlying substrate.
Other embodiments may include other materials for use as substances with an affinity for oxygen but that also partially or completely Zo dissolve in the refractory metal, such as rhenium. The present invention provides a material alloy by which robust and durable parts may be achieved for use in hostile operating conditions such as those in jet engines or the like.
While the present invention has been described with reference to a preferred embodiment or to particular embodiments, it will be understood that various changes and additional variations may be made any!
equivalents may be substituted for elements thereof without departing from the scope of the invention or the inventive concept thereof. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to particular embodiments disclosed herein for carrying it out, but that the to invention includes all embodiments falling within the scope of the appended claims.
SUMMARY OF TFIE INWENTION
The present invention provides a family of new wear-resistant rhenium-based alloys for use in environments where unalloyed or pure to rhenium would be subject to oxidation and/or vaporization.
The general purpose of the present invention, which will be described subsequently in greater detail, is to provide better materials for use in mechanically or otherwise stressful operating environments in order to provide better wear characteristics and function~which are not is anticipated, rendered obvious, suggested, or even implied by any of the prior art alloys, either alone or in any combination thereof.
By way of example only, the present invention is embodied in an alloy that has a refractory metal, particularly rhenium, that is subject to oxidation well below its melting point and well below the temperature at 2o which it loses strength and may strengthen the metal by selective combination. This results in an alloy that better resists oxidation and that may have better (and at least as good) wear characteristics. The refractory metal is combined with ether alloying materials, such as metals, that have a strong affinity for oxygen. Such alloying materials include the metals chromium, cobalt, nickel, titanium, thorium, aluminum, hafnium, and related elements on the periodic table. These particular elements are at least somewhat soluble in rhenium, if not completely soluble.
s It is believed that such elements protect rhenium by forming an oxide on its surface. Once the oxide has formed on the surface of the alloyed part, further attack by oxygen is prevented by the oxide coating.
This is a phenomenon that is well-known with aluminum that oxidizes in oxygen, but once the surface of an aluminum object has oxidized, further io oxidation is prevented as oxygen cannot get to the unoxidized aluminum below the oxidized surtace layer. Stainless steel also exhibits similar characteristics.
Consequently, those metals or other alloying agents that oxidize to form high boiling point oxides may well aid in the protection of the is underlying rhenium alloy.
lJsing powder metallurgy, and possibly using free form fabrication (FFF) or casting, parts and components can be fabricated from rhenium-based alloys having oxygen-attracting qualities. The use of such techniques may render useful alloys with better wear and lower oxidation 2o characteristics. Other features and advantages of the present invention will become apparent from the following description of the preferred embodiments which illustrate by way of example the principles of the invention.
DESCRIPTIOiV ~F THE PREFERRED EMB~DIMENT(S) The detailed description set forth below in connection with the appended drawings is intended as a description of presently-preferred embodiments of the invention and is not intended to represent the only forms in which the present invention may be constructed and/or utilized.
The description sets forth the functions and the sequence of steps for constructing and operating the invention in connection with the illustrated embodiments. However, it is to be understood that the same or equivalent functions and sequences may be accomplished by different embodiments Io that are also intended to be encompassed within the spirit and scope of the invention.
One embodiment is achieved by initially obtaining some amount of pure rhenium in order to provide a better and unadulterated alloy.
Rhenium is a refractory metal and the process described herein may apply is to other refractory metals that require protection from oxidation in order to obtain better wear-resistant characteristics or otherwise.
The alloys set forth herein may be fabricated by powder metallurgy at relatively low pressures and temperatures for refractory metals, on the order of 3,000 - 4,000 psi (pounds per square inch) at approximately 20 1800°F (982°C, 1255.15°K) for rhenium. Alternatively, free form fabrication (FFF) or casting may also provide good results. This last option of casting is generally difficult and costly due to the very high melting temperature of rhenium. Additionally, due to the oxidation characteristics of rhenium, the ambient environment in which rhenium alloy is formed (as by powder metallurgy, free form fabrication, and/or casting) may need to be neutral, reducing, andlor under vacuum in order to avoid oxidation. Practically, powder metallurgy and free form fabrication s techniques are believed to be the most effective.
In terms of atomic percent, an alloy (designated herein as HRA30) composed of 60% rhenium, 20% cobalt, 15% chromium, and 5%
magnesium has shown to lower the oxidation rate of pure rhenium by a factor of 10. Additional alloys using various percentages of cobalt, to chromium, manganese, nickel, vanadium, silicon, aluminum, yttrium, titanium, thorium, hafnium, or other elements may also be used either alone or in combination with each other. Other elements or substances with affinity for oxygen that produce oxidation-protective coating for the underlying rhenium or rhenium alloy are appropriate for use in order to ~s achieve the present invention. Additionally, such alloying substances are believed to be more effective if they are at least, if not completely, soluble in rhenium.
In one embodiment, a minimum of 50% rhenium atomic percent may be combined with cobalt in order to produce an alloy with desired 2o characteristics. The atomic percent of cobalt may range from approximately 0% to 50%. Additionally, chromium may be added in an amount ranging from approximately 10-15% by atomic percent.
In another embodiment, known in the trade as Honeywell Alloy HRA33, the atomic percentages are as follows: rhenium approximately 55%, cobalt approximately 20%, chromium approximately 10%, nickel approximately 10% and manganese approximately 5%.
The alloys created herein cannot only be used as material by which components or parts may be formed, but also as a coating under which rhenium or other core components could be protected from oxidation and/or to increase wear resistance in elevated temperature environments such as those arising in operating jet engines. Under such circumstances, matching of coefficients of thermal expansion may prove useful and further io research may be performed in this area. It is believed that those of ordinary skill in the art would not have to perform undue experimentation in order to achieve the alloys set forth herein in order to obtain the desired characteristics. Similarly, the same is also believed to be true for the use of the alloy of the present invention for coating underlying materials. For Is applications of the instant alloys as coatings, intermediate coatings may be used to enhance adhesion or otherwise between the outer alloy coating and the underlying substrate.
Other embodiments may include other materials for use as substances with an affinity for oxygen but that also partially or completely Zo dissolve in the refractory metal, such as rhenium. The present invention provides a material alloy by which robust and durable parts may be achieved for use in hostile operating conditions such as those in jet engines or the like.
While the present invention has been described with reference to a preferred embodiment or to particular embodiments, it will be understood that various changes and additional variations may be made any!
equivalents may be substituted for elements thereof without departing from the scope of the invention or the inventive concept thereof. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to particular embodiments disclosed herein for carrying it out, but that the to invention includes all embodiments falling within the scope of the appended claims.
Claims (7)
1. A rhenium-base oxidation-resistant alloy, comprising:
at least 50% rhenium by atomic percent; and at least thirty percent (30%) of the alloy comprising an alloying substance with an affinity for oxygen, the alloying substance at least partially soluble in rhenium, the alloying substance at least partially dissolved in the rhenium, wherein the alloying substance comprises cobalt, chromium and manganese; whereby an alloy is produced by the combination of the rhenium and the alloying substance that is more resistant to oxidation.
at least 50% rhenium by atomic percent; and at least thirty percent (30%) of the alloy comprising an alloying substance with an affinity for oxygen, the alloying substance at least partially soluble in rhenium, the alloying substance at least partially dissolved in the rhenium, wherein the alloying substance comprises cobalt, chromium and manganese; whereby an alloy is produced by the combination of the rhenium and the alloying substance that is more resistant to oxidation.
2. A rhenium base oxidation-resistant alloy as set forth in Claim 1, further comprising:
the cobalt being cobalt by atomic percent in a range from more than 0% to approximately 50%.
the cobalt being cobalt by atomic percent in a range from more than 0% to approximately 50%.
3. A rhenium-base oxidation resistant alley as set forth in Claim 1, further comprising:
the chromium being chromium by atomic percent in a range from more than 0% to approximately 15%.
the chromium being chromium by atomic percent in a range from more than 0% to approximately 15%.
4. A rhenium-base oxidation-resistant alloy as set forth in Claim 1, further comprising:
the manganese being manganese by atomic percent in a range from more than 0% to approximately 10%.
the manganese being manganese by atomic percent in a range from more than 0% to approximately 10%.
5. A rhenium-base oxidation-resistant alloy as set forth in Claim 1, further comprising:
nickel.
nickel.
6. A rhenium-base oxidation-resistant alloy as set forth in Claim 5, further comprising;
the nickel being nickel by atomic percent in a range from more than 0% to approximately -15%.
the nickel being nickel by atomic percent in a range from more than 0% to approximately -15%.
7. A rhenium base oxidation resistant alloy as set forth in Claim 1, further comprising elements selected from the group consisting of:
vanadium, silicon, aluminum, yttrium, and thorium.
vanadium, silicon, aluminum, yttrium, and thorium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/138,087 US6749803B2 (en) | 2002-05-03 | 2002-05-03 | Oxidation resistant rhenium alloys |
| US10/138,087 | 2002-05-03 | ||
| PCT/US2003/013449 WO2003093522A1 (en) | 2002-05-03 | 2003-04-30 | Oxidation resistant rhenium alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2484686A1 true CA2484686A1 (en) | 2003-11-13 |
Family
ID=29269250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002484686A Abandoned CA2484686A1 (en) | 2002-05-03 | 2003-04-30 | Oxidation resistant rhenium alloys |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US6773663B2 (en) |
| EP (1) | EP1501955B1 (en) |
| JP (1) | JP2005524771A (en) |
| AU (1) | AU2003243181A1 (en) |
| BR (1) | BR0309762A (en) |
| CA (1) | CA2484686A1 (en) |
| WO (1) | WO2003093522A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7270782B2 (en) * | 2002-09-13 | 2007-09-18 | Honeywell International, Inc. | Reduced temperature and pressure powder metallurgy process for consolidating rhenium alloys |
| US6911063B2 (en) * | 2003-01-13 | 2005-06-28 | Genius Metal, Inc. | Compositions and fabrication methods for hardmetals |
| US20070034048A1 (en) * | 2003-01-13 | 2007-02-15 | Liu Shaiw-Rong S | Hardmetal materials for high-temperature applications |
| US7645315B2 (en) * | 2003-01-13 | 2010-01-12 | Worldwide Strategy Holdings Limited | High-performance hardmetal materials |
| JP4626482B2 (en) * | 2004-11-10 | 2011-02-09 | 株式会社ニコン | Electronic camera |
| US20060165547A1 (en) * | 2005-01-26 | 2006-07-27 | Honeywell International, Inc. | High strength rhenium alloys and high temperature components made from such alloys |
| US7857188B2 (en) * | 2005-03-15 | 2010-12-28 | Worldwide Strategy Holding Limited | High-performance friction stir welding tools |
| GB0507217D0 (en) * | 2005-04-09 | 2005-05-18 | Rolls Royce Plc | A rotor for an electrical machine |
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-
2002
- 2002-05-03 US US10/138,090 patent/US6773663B2/en not_active Expired - Fee Related
- 2002-05-03 US US10/138,087 patent/US6749803B2/en not_active Expired - Fee Related
-
2003
- 2003-04-30 CA CA002484686A patent/CA2484686A1/en not_active Abandoned
- 2003-04-30 WO PCT/US2003/013449 patent/WO2003093522A1/en active IP Right Grant
- 2003-04-30 JP JP2004501656A patent/JP2005524771A/en not_active Withdrawn
- 2003-04-30 EP EP03747622A patent/EP1501955B1/en not_active Expired - Fee Related
- 2003-04-30 AU AU2003243181A patent/AU2003243181A1/en not_active Abandoned
- 2003-04-30 BR BR0309762-5A patent/BR0309762A/en not_active Application Discontinuation
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|---|---|
| JP2005524771A (en) | 2005-08-18 |
| BR0309762A (en) | 2005-05-10 |
| US6773663B2 (en) | 2004-08-10 |
| EP1501955B1 (en) | 2007-01-17 |
| US20030206824A1 (en) | 2003-11-06 |
| US20030206823A1 (en) | 2003-11-06 |
| EP1501955A1 (en) | 2005-02-02 |
| US6749803B2 (en) | 2004-06-15 |
| WO2003093522A1 (en) | 2003-11-13 |
| AU2003243181A1 (en) | 2003-11-17 |
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