CN105055050A - Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning - Google Patents
Method for preparing low-friction and high-hardness artificial hip joint ball through surface patterning Download PDFInfo
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- CN105055050A CN105055050A CN201510473611.2A CN201510473611A CN105055050A CN 105055050 A CN105055050 A CN 105055050A CN 201510473611 A CN201510473611 A CN 201510473611A CN 105055050 A CN105055050 A CN 105055050A
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- hip joint
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Abstract
The invention relates to a method for preparing a low-friction and high-hardness artificial hip joint ball through surface patterning. The low-friction and high-hardness artificial hip joint ball is made from a CO-Cr-Mo alloy material, and the method is characterized in that patterned dimple arrays are formed on the surface of the artificial hip joint ball, namely the patterned dimple arrays are made on the friction surface of the artificial hip joint ball through laser interferometric lithography to form a small temporary synovial fluid or tissue fluid storage device, and meanwhile the actual contact area between friction pairs is decreased and abrasive grains produced in the friction process are accommodated to achieve the friction-reducing purpose. The instantaneous high temperature of laser enables the grains to be refined, the material hardness is enhanced, and the artificial hip joint with low friction and high hardness is obtained. The low-friction and high-hardness artificial hip joint ball has good lubricating property and can reduce the friction effect between interfaces of the friction pairs of the artificial hip joint and reduce friction. In addition, the hardness is improved, the abrasion is reduced, and the friction and abrasion resisting performance of an existing artificial hip joint ball is optimized.
Description
Technical field
The present invention relates to a kind of method that patterned surface prepares low friction high rigidity artificial hip joint bulb, belong to the improvement to existing artificial hip joint performance.
Background technology
Artificial joint replacement is the current most effective method of the whole end stage joint illness for the treatment of, obviously can improve the motor function of patient and improve life quality.Because population continues the significant prolongation of aging and human longevity, in the urgent need to developing long-life artificial joint.Therefore, can the key issue needing solution be at present exactly provide super quality and competitive price, long life, biocompatible artificial joint for the osteoarthritis patient that the whole world is hundreds of millions of.
Artificial joint technology relates to the multi-disciplinary intersections such as materialogy, bio-tribology and engineering in medicine, is related to the quality of life of people.The friction and wear behavior of artificial joint is the key factor evaluating its quality.How to improve the performance of artificial joint frictional interface, and then become world's problem that a crowd pays close attention to the service life significantly improving artificial joint.Domestic and international material and medical science and technology worker have carried out large quantity research to raising artificial joint material antiwear and friction reduction property, mainly concentrate at present and surface modification treatment is carried out to traditional joint material, to improving material surface state and physics, chemical property, thus improve the anti-wear performance of artificial joint material, reduce coefficient of friction.
Reach by surface modification the Main Means improving artificial joint material tribological property and have face coat method, surface graft modification, plasma treatment, patterned surface etc.Through finding the retrieval of prior art, Chinese invention patent numbers 200810137090.3, day for announcing 2009-01-21, Chinese invention patent number describes titanium alloy artificial hip joint and the manufacture method thereof of band abrasion-proof ceramic coat, Chinese invention patent, 201210086231.X, publication date 2012-08-08, describe artificial hip joint friction pair surface film layer and preparation method thereof, the key of coating quality is the size of interface bond strength between coating and matrix, and this is most important in coating and more scabrous problem.Meanwhile, the difference of the thermal coefficient of expansion of coating and matrix can cause there is internal stress in material, and then affects the abrasion-resistance of artificial joint.
Patterned surface builds the micro/nano level microcapsule patterning with regular shape at material surface, and surperficial microcapsule has the effect storing lubricating fluid, thus the lubricating status of secondary surface is joined in improvement friction, realizes the raising of tribological property.Chinese invention patent 201010103613.X, day for announcing 2010-07-14, describe artificial joint superhigh molecular weight polyethylene material surface superfine texture processing method, improves its tribological property as artificial joint material.
The advantage of mating surface patterning, laser interference is manufactured on patterned surface modification aspect and has the irreplaceable potential estimating of other technologies.The periodic structure that material surface (curved surface or plane) forms high accuracy nanoscale, micron order and the micro-nano mixing corresponding with pattern is directly processed or revised to the pattern (spatially multiply periodic Energy distribution) that this technology utilizes multi-beam laser to interfere and produces, and obtains the material surface with specific physical and chemical characteristic.
Therefore, the present invention by laser interference manufacturing technology and patterning techniques R. concomitans in the surface modification aspect of artificial hip joint bulb, overcome the deficiencies in the prior art, a kind of patterned surface is provided to prepare the method for low friction high rigidity artificial hip joint, belong to the improvement to existing artificial hip joint performance, improve hardness and the tribological property of artificial hip joint.
Summary of the invention
The technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of method adopting laser interference photolithography technology to realize patterned surface to prepare low friction high rigidity artificial hip joint bulb is provided, the method has excellent controllability, good stability and durability, and has the advantage that exposure field area is large, efficiency is high, be applicable to overcast production in enormous quantities.Belong to the improvement to existing artificial hip joint performance, improve hardness and the tribological property of artificial hip joint.
Object of the present invention can be realized by following technical measures: a kind of patterned surface prepares the method for low friction high rigidity artificial hip joint bulb, be made up of vitallium material, it is characterized in that: form patterning dimple array on artificial hip joint bulb surface, namely prepare patterning dimple array at artificial hip joint bulb friction surface laser interference lithography, comprise the following steps:
A. ultrasonic cleaning is carried out to hip joint bulb;
B. three beam laser optical interference circuit systems are set up, etching sample;
C. change Three-beam Interfere parameter, obtain structural cycle from nanoscale to micrometer-adjustable, the periodic lattice structure that the degree of depth is controlled;
D. optimize the parameters such as the interference light intensity of Three-beam Interfere system and time of exposure, obtain low friction high rigidity performance artificial hip joint bulb.
Described patterning dimple array is made up of the miniature dimple oldered array of large area periodicity, and the dimple array period of preparation is 1-10 μm, and the dimple degree of depth is 0.3-6 μm.
Described three beam laser interference systems are by laser instrument, beam splitting, refractive power and orthopedic systems composition, beam of laser is sent by laser instrument, three beams coherent beam is divided into through divided beam system, divided beam system is by high reflective mirror, spectroscope, half-wave plate and polaroid composition, three beams coherent light space symmetr is made through dioptric system, orthopedic systems carries out beam shaping at three beam convergences before sample, make them be irradiated on sample with certain angle of incidence simultaneously, change three beams spatial light interferometric parameter, parameter comprises wavelength, Space Angle, angle of incidence, phase angle, polarization state, interference light intensity and time of exposure etc., make the characteristic size of three beam laser interference system interference figures from nanoscale to micrometer-adjustable, interfere on the surface at artificial hip joint bulb and obtain different cycles, density, the dimple lattice structure of characteristic size and different depth.
Before sample, carry out beam shaping respectively at three beam convergences to three-beam, orthopedic systems placed angle is determined according to the incident angle of light beam, makes spot energy distribution more even, is shaped to uniform beam.
Laser output wavelength used is 1064nm, and Gauss beam reshaping is light beam uniformly, and time of exposure is 10-70s, and laser energy density is 0.15-0.26Jcm
-2.
Cycle of adjustment artificial hip joint bulb surface dimple array, the dimple degree of depth and pattern, obtain the surface of low friction, high rigidity performance, obtain coefficient of friction and reduce 64%, hardness strengthens the optimization artificial hip joint of 40%.
The present invention has following advantage compared with existing method and system:
(1) mostly existing joint modification technology is to achieve hardness or the one-side optimization of tribology.The patterning dimple lattice structure adopting laser interference method to prepare, optimizes the tribological property between joint-friction interface, simultaneously the TRANSIENT HIGH TEMPERATURE of laser, and in ablator process, make grain refinement, material hardness is improved simultaneously.
(2) the present invention all employ optical polarization device due to a branch of coherent light every in light path, every a branch of polarisation of light state and light intensity are regulated and controled respectively, to improve the contrast of conoscope image, make shape and the quality more advantage such as controllable precise of conoscope image.
(3) because laser interferometry can produce the structure plan of nanoscale to micrometer-adjustable, there is the advantage that pattern character size is little, pattern density adjustability is good.
(4) due to laser interferometry make pattern that the present invention produces without the need to mask, exposure field area is large, efficiency is high, processing technology is relatively simple, have fast, large area, efficient, low cost realize the advantage that artificial hip joint bulb patterning reaches antifriction, high rigidity performance.
(5) because laser interferometry makes micro-nano structure that the present invention produces can realize large area periodic structure preparation by the method for Mechanical Moving wafer workpiece platform or interference optics, there is the advantage making large area periodically dimple array.
(6) due to dimple array, the Miniature temporary storage of joint fluid or tissue fluid can be formed, reduce the real contact area between friction pair simultaneously, hold the abrasive particle produced in friction process, reach the object of antifriction.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention;
Fig. 2 is artificial hip joint Sphere Model figure prepared by the present invention;
Fig. 3 is that the present invention adopts Three-beam Interfere to realize the system schematic of artificial hip joint bulb dimple array;
Fig. 4 is that the present invention adopts Three-beam Interfere to realize the system light path figure of artificial hip joint bulb dimple array;
Fig. 5 and Fig. 6 is the dimple array structure pattern that Three-beam Interfere produces.
Detailed description of the invention
Shown in Fig. 1, the present invention is embodied as:
Form patterning dimple array on artificial hip joint bulb surface, namely prepare patterning dimple array at artificial hip joint bulb friction surface laser interference lithography, comprise the following steps:
A. ultrasonic cleaning is carried out to hip joint bulb;
B. three beam laser optical interference circuit systems are set up, etching sample;
C. change Three-beam Interfere parameter, obtain structural cycle from nanoscale to micrometer-adjustable, the periodic lattice structure that the degree of depth is controlled;
D. optimize interference light intensity and the exposure time parameter of Three-beam Interfere system, obtain low friction, high rigidity performance artificial hip joint bulb.
As shown in Figure 2, be artificial hip joint Sphere Model figure prepared by the present invention; Artificial hip joint bulb sample is carried out ultrasonic cleaning, and ultrasonic cleaning 5min in acetone soln, dehydrated alcohol, deionized water solution, washes away surface contaminant successively.The optical interference circuit built as shown in Figure 3 is interfered, and prepares dimple lattice structure, prepare design sketch as shown in Figure 2 on artificial hip joint bulb surface, and wherein dimple array period is 1-10 μm, and the dimple degree of depth is 0.3-6 μm.
As shown in Figure 3, for the present invention adopts Three-beam Interfere to realize the system schematic of artificial hip joint bulb dimple array.The laser interference system adopted forms beam splitting system by 6 high reflective mirrors (M1-M6) and two spectroscopes (B1-B2).Beam of laser is sent by laser instrument (Laser), to be turned back light path by mirror M 4, three beams coherent beam is divided into again by divided beam system, divided beam system is made up of high reflective mirror, spectroscope, half-wave plate and polaroid, make three beams coherent light space symmetr through dioptric system, orthopedic systems carries out beam shaping at three beam convergences before sample, makes them be irradiated on sample with certain angle of incidence simultaneously, form patterning dimple lattice structure, as shown in Figure 5,6.
By changing three beams spatial light interferometric parameter, parameter comprises wavelength, Space Angle, angle of incidence, phase angle, polarization state, interference light intensity and time of exposure etc., make the characteristic size of three beam laser interference system interference figures from nanoscale to micrometer-adjustable, interfere the dimple lattice structure obtaining different cycles, density, characteristic size and different depth at artificial hip joint bulb on the surface.
Before sample, carry out beam shaping respectively at three beam convergences to three-beam, orthopedic systems placed angle is determined according to the incident angle of light beam, makes spot energy distribution more even, is shaped to uniform beam.
As shown in Figure 4, the laser of 1064nm wavelength is sent by laser instrument, three beams coherent light is divided into through beam splitting, refractive power and orthopedic systems, converge at artificial hip joint bulb surface, incident illumination Space Angle becomes system centre axial symmetry to distribute, namely 0 °, 120 °, 240 °, with 5 ° of incident angles, light intensity and the polarization direction of each light beam is accurately controlled by wave plate and polaroid, polarization direction is TE-TE-TM, form periodically optical field distribution structure, direct etching artificial hip joint bulb surface forms corresponding dimple array structure.
Claims (6)
1. a patterned surface prepares the method for low friction high rigidity artificial hip joint bulb, be made up of vitallium material, it is characterized in that: form patterning dimple array on artificial hip joint bulb surface, namely prepare patterning dimple array at artificial hip joint bulb friction surface laser interference lithography, comprise the following steps:
A. ultrasonic cleaning is carried out to hip joint bulb;
B. three beam laser optical interference circuit systems are set up, etching sample;
C. change Three-beam Interfere parameter, obtain structural cycle from nanoscale to micrometer-adjustable, the periodic lattice structure that the degree of depth is controlled;
D. optimize the parameters such as the interference light intensity of Three-beam Interfere system and time of exposure, obtain low friction high rigidity performance artificial hip joint bulb.
2. method according to claim 1, is characterized in that: described patterning dimple array is made up of the miniature dimple oldered array of large area periodicity, and the dimple array period of preparation is 1-10 μm, and the dimple degree of depth is 0.3-6 μm.
3. method according to claim 1, it is characterized in that: described three beam laser interference systems are by laser instrument, beam splitting, refractive power and orthopedic systems composition, beam of laser is sent by laser instrument, three beams coherent beam is divided into through divided beam system, divided beam system is by high reflective mirror, spectroscope, half-wave plate and polaroid composition, three beams coherent light space symmetr is made through dioptric system, orthopedic systems carries out beam shaping at three beam convergences before sample, make them be irradiated on sample with certain angle of incidence simultaneously, change three beams spatial light interferometric parameter, parameter comprises wavelength, Space Angle, angle of incidence, phase angle, polarization state, interference light intensity and time of exposure, make the characteristic size of three beam laser interference system interference figures from nanoscale to micrometer-adjustable, interfere on the surface at artificial hip joint bulb and obtain different cycles, density, the dimple lattice structure of characteristic size and different depth.
4. method according to claim 3, is characterized in that: before sample, carry out beam shaping at three beam convergences, and orthopedic systems placed angle is determined according to the incident angle of light beam, makes spot energy distribution more even, is shaped to uniform beam.
5. method according to claim 3, is characterized in that: laser output wavelength used is 1064nm, and Gauss beam reshaping is light beam uniformly, and time of exposure is 10-70s, and laser energy density is 0.15-0.26Jcm
-2.
6. the method according to claim 1 and 3, it is characterized in that: adjust the cycle of artificial hip joint bulb surface dimple array, the dimple degree of depth and pattern, obtain the surface of low friction high rigidity performance, obtain coefficient of friction and reduce 64%, hardness strengthens the optimization artificial hip joint of 40%.
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| CN106842822A (en) * | 2017-01-18 | 2017-06-13 | 长春理工大学 | The laser interference nanometer lithography system of one step texturing modified titanium alloy implant surface |
| CN107779815A (en) * | 2016-08-24 | 2018-03-09 | 现代自动车株式会社 | Method for the surface of coated vehicle running gear and the vehicle operation part by this method manufacture |
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