US3864154A - Ceramic-metal systems by infiltration - Google Patents

Ceramic-metal systems by infiltration Download PDF

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US3864154A
US3864154A US305038A US30503872A US3864154A US 3864154 A US3864154 A US 3864154A US 305038 A US305038 A US 305038A US 30503872 A US30503872 A US 30503872A US 3864154 A US3864154 A US 3864154A
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ceramic
aluminum
metal
compact
boride
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George E Gazza
Michael W Lindley
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US Department of Army
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/5805Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111Fine ceramics
    • C04B35/117Composites
    • CCHEMISTRY; METALLURGY
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64Burning or sintering processes
    • C04B35/65Reaction sintering of free metal- or free silicon-containing compositions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81Coating or impregnation
    • C04B41/85Coating or impregnation with inorganic materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81Coating or impregnation
    • C04B41/85Coating or impregnation with inorganic materials
    • C04B41/88Metals
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/10Alloys containing non-metals
    • C22C1/1036Alloys containing non-metals starting from a melt
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C29/00Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/14Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides

Definitions

  • Tl'llS invention covers ceramic-metal compositions fabricated by infiltrating a porous ceramic compact with [52] U.S. Cl. 29/123 B, 29/ 182.1, 117/22, a molten meta] impreghahh
  • a cold pressed compact 117/541 117/611 117/131, 117M351 of silicon boride, aluminum boride, boron, and (alumi- 117/160, 117,169 264/60 num boride-boron) were each positioned between [51] I t.
  • This invention relates to the production of ceramicmetal materials, and more particularly to production by the infiltration of a porous cold pressed ceramic compact with a molten metal.
  • FIG. 1 is a photomicrograph of a cross-sectional area microstructure of an AlB1g-Al infiltrated compact.
  • FIG. 2 is a photomicrograph of a cross-sectional area microstructure of an AlB -Si infiltrated compact.
  • a cold pressed compact of A18 powder (minus 325 mesh), 1 inch in diameter and 0.3 inch thick, which was formed by applying 17,000 psi pressure to the powder in a cold pressing die, was utilized.
  • a graphite crucible having an ID. of 1% inch was lined with 0.005 inch thick grafoil sheet.
  • Six grams of aluminum powder were placed at the bottom of the crucible and lightly tamped.
  • the cold pressed AlB compact was placed on the aluminum powder.
  • Six additional grams of aluminum powder were positioned on top of the AIR powder compact and a grafoil lid was placed over the top of the crucible.
  • the crucible, loaded with AlB compact sandwiched between the aluminum powder was placed in a vacuum furnace. The furnace was evacuated to approximately 10 torr and the crucible was heated to 500 C and held at this temperature 1% hours to permit outgassing. The temperature was subsequently raised to l,l C and maintained for a period of 3 hours.
  • the process was repeated utilizing silicon in lieu of the aluminum.
  • the procedure was identical with the exception that the outgassing temperature was 750 C for a period of 1% hours and the infiltration temperature was l,500 C for a period of 2 hours.
  • SiB.,-Al; B-Al; B.,CAl/Si; and AlB -B-Al materials have been prepared utilizing the above conditions.
  • the last material consisted of a ceramic skeleton comprised of by weight AlB and 40% by weight boron, impregnated with aluminum metal.
  • silicon was added to the aluminum and this combination was impregnated into 8 C, the silicon acting as a wetting agent.
  • Densities of the ceramic-metal compositions were within the range of about 2.3 to about 2.7 g/cc. Possible uses of the ceramic-metal material include ceramic armor, ceramic composite bearings and wear-resistant specialized materials.
  • a ceramic-metal composition consisting of a metal impregnated into a porous ceramic compact by infiltration, selected from the group consisting of:

Abstract

This invention covers ceramic-metal compositions fabricated by infiltrating a porous ceramic compact with a molten metal impregnant. A cold pressed compact of silicon boride, aluminum boride, boron, and (aluminum boride-boron) were each positioned between powdered aluminum in a vacuum furnace which enabled the molten aluminum to infiltrate into the porous ceramic by capillary action. In addition, a porous ceramic compact of aluminum boride was similarly infiltrated with silicon.

Description

0 United States Patent 1191 1111 3,864,154 Gazza et al. Feb. 4, 1975 4] CERAMIC-METAL SYSTEMS BY 2,581,252 1/1952 Goetzel et al 29/1-82.1 x INFILTRATION 2,581,253 1/1952 Ellis et al. 29/l82.1 X 2,612,443 9/1952 Goetzel et a1... 29/182.1 X Inventors: George Gazza, y, a s; 2,672,426 3/1954 Grubel et al.... 117/121 Michael W. Lindley, Holton Heath, 3,457,051 7/1969 Bergna 75/202 X England 3,718,441 2/1973 Landingham.... 29/182.l X
, 25,01 4197 W 75 [73] Assignees: The United States'of America as 3 7 5 3 eaver 002 x represented by the Secretary of the Army, Washington, DC. by said Primary Examiner-William D. Martin Gazza; The Secretary of State for Assistant Examiner-Shrive P. Beck Defence Ministry of D f Attorney, Agent, or Firm-Robert P. Gibson London, England; by said Lindley [22] F1led: Nov. 9, 1972 [57] ABSTRACT [21] Appl. No.: 305,038
Tl'llS invention covers ceramic-metal compositions fabricated by infiltrating a porous ceramic compact with [52] U.S. Cl. 29/123 B, 29/ 182.1, 117/22, a molten meta] impreghahh A cold pressed compact 117/541 117/611 117/131, 117M351 of silicon boride, aluminum boride, boron, and (alumi- 117/160, 117,169 264/60 num boride-boron) were each positioned between [51] I t. Cl C03c 17/00, C04b 41/00 powdered aluminum in a vacuum furnace Whigh [58] Field of Search 117/22, 54, 61, 98, 119, ahled the molten aluminum to i filt t into the 117/ 121, 123 B, 160, 169 A, 169 R, 135.1, rous ceramic by capillary action. In addition, a porous 131; 82-1; 75/202; 51/309; 264/60 ceramic compact of aluminum boride was similarly infiltrated with silicon. [5 6] References Cited UNITED STATES PATENTS 6 Claims, 2 Drawing Figures 1,913,373 6/1933 Golyer 75/202 X a 1 I a 1 f4 AI B,2--- Al CERAMIC-METAL SYSTEMS BY INFILTRATION The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment us use of any royalty thereon.
BACKGROUND OF THE INVENTION This invention relates to the production of ceramicmetal materials, and more particularly to production by the infiltration of a porous cold pressed ceramic compact with a molten metal.
SUMMARY OF THE INVENTION It is an object of the present invention to provide and disclose the fabrication of ceramic-metal materials comprising the filtration of a molten metal into a porous ceramic compact.
It is a further object of the invention to provide and disclose a ceramic-metal material comprising a uniform dispersion of the metal in the ceramic.
It is a further object of the invention to provide and disclose a ceramic-metal material having each component in a continuous phase.
It is a further object of the present invention to provide and disclose a ceramic-metal material exhibiting ductility.
It is a further object of the present invention to provide and disclose a ceramic-metal material which is generally hard and non-ductile.
Other objects and a fuller understanding of the invention may be ascertained from the following description and claims taken in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a photomicrograph of a cross-sectional area microstructure of an AlB1g-Al infiltrated compact.
FIG. 2 is a photomicrograph of a cross-sectional area microstructure of an AlB -Si infiltrated compact.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Other objects and a fuller understanding of the invention may be ascertained from the following description and claims.
In an illustrative example, a cold pressed compact of A18 powder (minus 325 mesh), 1 inch in diameter and 0.3 inch thick, which was formed by applying 17,000 psi pressure to the powder in a cold pressing die, was utilized. A graphite crucible having an ID. of 1% inch was lined with 0.005 inch thick grafoil sheet. Six grams of aluminum powder were placed at the bottom of the crucible and lightly tamped. The cold pressed AlB compact was placed on the aluminum powder. Six additional grams of aluminum powder were positioned on top of the AIR powder compact and a grafoil lid was placed over the top of the crucible. The crucible, loaded with AlB compact sandwiched between the aluminum powder, was placed in a vacuum furnace. The furnace was evacuated to approximately 10 torr and the crucible was heated to 500 C and held at this temperature 1% hours to permit outgassing. The temperature was subsequently raised to l,l C and maintained for a period of 3 hours. At
this temperature, the molten aluminum easily penetrated into the porous AlBg compact.
The process was repeated utilizing silicon in lieu of the aluminum. The procedure was identical with the exception that the outgassing temperature was 750 C for a period of 1% hours and the infiltration temperature was l,500 C for a period of 2 hours.
In addition to the above ceramic-metal materials, SiB.,-Al; B-Al; B.,CAl/Si; and AlB -B-Al materials have been prepared utilizing the above conditions. The last material consisted of a ceramic skeleton comprised of by weight AlB and 40% by weight boron, impregnated with aluminum metal. For B CAl/Si, silicon was added to the aluminum and this combination was impregnated into 8 C, the silicon acting as a wetting agent.
Densities of the ceramic-metal compositions were within the range of about 2.3 to about 2.7 g/cc. Possible uses of the ceramic-metal material include ceramic armor, ceramic composite bearings and wear-resistant specialized materials.
Although we have described out invention with a certain degree of particularity, it is understood that the present disclosure has been made by way of example and that numerous modifications may be resorted to in the ways of components and reaction conditions, etc. without departing from the spirit and scope of the invention.
Having described our invention, we claim:
I. A ceramic-metal composition consisting of a metal impregnated into a porous ceramic compact by infiltration, selected from the group consisting of:
CERAMIC METAL IMPREGNANT a) SiB A] b) AlB A] c) AlB Si d) B Al e) AlB -B Al

Claims (6)

1. A CERAMIC-METAL COMPOSITION CONSISTING OF A METAL IMPREGNATED INTO POROUS CERAMIC COMPACT BY INFILTRATION, SELECTED FROM THE GROUP CONSISTING OF:
2. A material in accordance with claim 1 wherein the ceramic-metal material is SiB6-Al.
3. A material in accordance with claim 1 wherein the ceramic-metal material is AlB12Si.
4. A material in accordance with claim 1 wherein the ceramic-metal material is B-Al.
5. A material in accordance with claim 1 wherein the ceramic-metal material is AlB12-B-Al.
6. A ceramic-metal composition in accordance with claim 1 wherein the ceramic-metal composition is AlB12-Al.
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Cited By (213)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033400A (en) * 1973-07-05 1977-07-05 Eaton Corporation Method of forming a composite by infiltrating a porous preform
DE3005586A1 (en) * 1980-02-15 1981-08-20 Kernforschungsanlage Jülich GmbH, 5170 Jülich ARMOR
US4404262A (en) * 1981-08-03 1983-09-13 International Harvester Co. Composite metallic and refractory article and method of manufacturing the article
EP0116809A1 (en) * 1983-02-16 1984-08-29 MOLTECH Invent S.A. Cermets and their manufacture
GB2148270A (en) * 1983-10-22 1985-05-30 British Ceramic Res Ass Cermet materials
US4595559A (en) * 1982-10-05 1986-06-17 Fonderies Montupet Process for the production of composite alloys based on aluminum and boron and product thereof
EP0239520A1 (en) * 1986-03-07 1987-09-30 Lanxide Technology Company, Lp. Process for preparing self-supporting bodies and products made thereby
US4806508A (en) * 1986-09-17 1989-02-21 Lanxide Technology Company, Lp Modified ceramic structures and methods of making the same
US4808558A (en) * 1987-08-26 1989-02-28 Lanxide Technology Company, Lp Ceramic foams
US4818734A (en) * 1986-09-17 1989-04-04 Lanxide Technology Company, Lp Method for in situ tailoring the metallic component of ceramic articles
US4818454A (en) * 1986-09-16 1989-04-04 Lanxide Technology Company, Lp Method of making ceramic composite articles by inverse shape replication of an expendable pattern
US4820498A (en) * 1986-09-16 1989-04-11 Lanxide Technology Company, Lp Method for producing substantially pure alumina material
US4822759A (en) * 1986-09-16 1989-04-18 Lanxide Technology Company, Lp Ceramic composite structures having intrinsically fitted encasement members thereon & methods of making the same
US4822694A (en) * 1986-11-03 1989-04-18 Asulab S.A. Composite material
US4824625A (en) * 1986-09-16 1989-04-25 Lanxide Technology Company, Lp Production of ceramic and ceramic-metal composite articles incorporating filler materials
US4824008A (en) * 1986-09-16 1989-04-25 Lanxide Technology Company, Lp Surface bonding of ceramic bodies
US4824622A (en) * 1986-12-22 1989-04-25 Lanxide Technology Company, Lp Method of making shaped ceramic composites
US4826643A (en) * 1986-09-16 1989-05-02 Lanxide Technology Company, Lp Methods of making self-supporting ceramic structures
US4828008A (en) * 1987-05-13 1989-05-09 Lanxide Technology Company, Lp Metal matrix composites
US4828785A (en) * 1986-01-27 1989-05-09 Lanxide Technology Company, Lp Inverse shape replication method of making ceramic composite articles
US4830799A (en) * 1987-01-07 1989-05-16 Lanxide Technology Company, Lp Method of making shaped ceramic articles by shape replication of an expendable pattern
US4833110A (en) * 1986-09-16 1989-05-23 Lanxide Technology Company, Lp Method for producing composite ceramic structures
US4832892A (en) * 1987-01-14 1989-05-23 Lanxide Technology Company, Lp Assembly for making ceramic composite structures and method of using the same
US4834925A (en) * 1987-01-07 1989-05-30 Lanxide Technology Company, Lp Method for producing mold-shaped ceramic bodies
US4837232A (en) * 1986-09-16 1989-06-06 Lanxide Technology Company, Lp Dense skin ceramic structure and method of making the same
US4847025A (en) * 1986-09-16 1989-07-11 Lanxide Technology Company, Lp Method of making ceramic articles having channels therein and articles made thereby
US4847220A (en) * 1986-09-17 1989-07-11 Lanxide Technology Company, Lp Method of making ceramic composites
US4851375A (en) * 1985-02-04 1989-07-25 Lanxide Technology Company, Lp Methods of making composite ceramic articles having embedded filler
US4853352A (en) * 1984-07-20 1989-08-01 Lanxide Technology Company, Lp Method of making self-supporting ceramic materials and materials made thereby
US4859640A (en) * 1986-08-13 1989-08-22 Lanxide Technology Company, Lp Method of making ceramic composite articles with shape replicated surfaces
US4868143A (en) * 1986-08-13 1989-09-19 Lanxide Technology Company, Lp Methods of making ceramic articles with a modified metal-containing component
US4871696A (en) * 1986-09-16 1989-10-03 Lanxide Technology Company, Lp Method for producing substantially pure materials
US4873038A (en) * 1987-07-06 1989-10-10 Lanxide Technology Comapny, Lp Method for producing ceramic/metal heat storage media, and to the product thereof
US4874569A (en) * 1987-01-12 1989-10-17 Lanxide Technology Company, Lp Ceramic composite and methods of making the same
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US4882306A (en) * 1986-09-16 1989-11-21 Lanxide Technology Company, Lp Method for producing self-supporting ceramic bodies with graded properties
US4885130A (en) * 1987-07-15 1989-12-05 Lanxide Technology Company, Lp Process for preparing self-supporting bodies and products produced thereby
US4885131A (en) * 1989-01-13 1989-12-05 Lanxide Technology Company, Lp Process for preparing self-supporting bodies and products produced thereby
US4884737A (en) * 1987-05-21 1989-12-05 Lanxide Technology Company, Lp Method for surface bonding of ceramic bodies
US4886766A (en) * 1987-08-10 1989-12-12 Lanxide Technology Company, Lp Method of making ceramic composite articles and articles made thereby
US4891338A (en) * 1987-01-13 1990-01-02 Lanxide Technology Company, Lp Production of metal carbide articles
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US4904446A (en) * 1989-01-13 1990-02-27 Lanxide Technology Company, Lp Process for preparing self-supporting bodies and products made thereby
US4916113A (en) * 1985-02-04 1990-04-10 Lanxide Technology Company, Lp Methods of making composite ceramic articles
US4915736A (en) * 1987-12-23 1990-04-10 Lanxide Technology Company, Lp Method of modifying ceramic composite bodies by carburization process and articles produced thereby
US4921818A (en) * 1986-09-17 1990-05-01 Lanxide Technology Company, Lp Method of making ceramic composites
US4923832A (en) * 1986-05-08 1990-05-08 Lanxide Technology Company, Lp Method of making shaped ceramic composites with the use of a barrier
US4935055A (en) * 1988-01-07 1990-06-19 Lanxide Technology Company, Lp Method of making metal matrix composite with the use of a barrier
US4940679A (en) * 1987-07-15 1990-07-10 Lanxide Technology Company, Lp Process for preparing self-supporting bodies and products made thereby
US4948764A (en) * 1986-09-16 1990-08-14 Lanxide Technology Company, Lp Production of ceramic and ceramic-metal composite articles with surface coatings
US4956137A (en) * 1986-09-16 1990-09-11 Lanxide Technology Company, Lp Porous ceramic composite with dense surface
US4956338A (en) * 1987-07-06 1990-09-11 Lanxide Technology Company, Lp Methods for forming complex oxidation reaction products including superconducting articles
US4957779A (en) * 1988-02-18 1990-09-18 Lanxide Technology Company, Lp Method for producing a protective layer on a ceramic body
US4960736A (en) * 1986-09-16 1990-10-02 Lanxide Technology Company, Lp Surface bonding of ceramic bodies
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US4996176A (en) * 1986-09-16 1991-02-26 Lanxide Technology Company, Lp Reservoir feed method of making ceramic composite structures and structures made thereby
US5000892A (en) * 1986-09-16 1991-03-19 Lanxide Technology Company, Lp Method of making ceramic composite articles by inverse shape replication of an expendable pattern
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US5010044A (en) * 1989-01-13 1991-04-23 Lanxide Technology Company, Lp. Process for preparing self-supporting bodies and products produced thereby
US5011063A (en) * 1989-01-13 1991-04-30 Lanxide Technology Company, Lp Method of bonding a ceramic composite body to a second body and articles produced thereby
US5015610A (en) * 1986-09-16 1991-05-14 Lanxide Technology Company, Lp Porous ceramic composite with dense surface
US5015609A (en) * 1986-09-16 1991-05-14 Lanxide Technology Company, Lp Ceramic composite structures having intrinsically fitted encasement members thereon and methods of making the same
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US10406640B2 (en) 2014-12-22 2019-09-10 Rolls-Royce High Temperature Composites, Inc. Method for repairing ceramic matrix composite (CMC) articles
US10834790B2 (en) * 2014-12-22 2020-11-10 Rolls-Royce High Temperature Composites, Inc. Method for making ceramic matrix composite articles with progressive melt infiltration

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