Titanium alloy artificial articular head with wear resistant ceramic coating and preparation method of titanium alloy artificial articular head

A wear-resistant ceramic and artificial joint technology, applied in coatings, surface reaction electrolytic coatings, electrolytic coatings, etc., can solve the problems of poor lubrication of replacement joints, inability to make joint heads, and wear resistance of titanium alloys. Achieve the effect of reducing joint head loosening, high density, and improving hardness and wear resistance

Active Publication Date: 2015-04-29
NANJING HONGSHENGJIAN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After joint replacement, the joint capsule is removed, and insufficient synovial fluid will lead to poor lubrication of the replacement joint, which will increase wear and tear, and titanium alloy has poor wear resistance, making it impossible to make joint heads, etc.
A two-step plasma electrolytic oxidation process is used to make the surface coating more dense

Method used

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  • Titanium alloy artificial articular head with wear resistant ceramic coating and preparation method of titanium alloy artificial articular head
  • Titanium alloy artificial articular head with wear resistant ceramic coating and preparation method of titanium alloy artificial articular head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A titanium alloy artificial joint head with wear-resistant ceramic coating, the artificial joint head includes a titanium alloy joint head body 1 with a micropore array texture 2 formed on the surface, and a friction-reducing and wear-resistant ceramic coating is provided on the surface of the titanium alloy joint head body 1 Layer 3, the surface layer of the anti-friction and wear-resistant ceramic coating 3 is a dense ceramic layer 4 filled and sealed with hard nanoparticles 5 . Hard nanoparticles are SiO 2 particles.

[0025] A kind of nano-SiO 2 A method for preparing the surface texture of the particle-filled and sealed titanium alloy artificial joint head and a vitrified wear-resistant coating. The specific preparation steps are as follows:

[0026] 1) Polish the outer circular surface of the titanium alloy joint head body;

[0027] 2) Laser etching technology is used to texture the surface of the titanium alloy joint head body to form a regular micropore array...

Embodiment 2

[0033] A kind of wear-resistant ceramic coating titanium alloy artificial joint head, structure is the same as embodiment 1, and hard nano particle is Al 2 o 3 particles.

[0034] A nano-Al 2 o 3 A method for preparing the surface texture of the particle-filled and sealed titanium alloy artificial joint head and a vitrified wear-resistant coating. The specific preparation steps are as follows:

[0035] 1) Polish the outer circular surface of the titanium alloy joint head;

[0036] 2) The titanium alloy joint head is textured by photolithography micro-electrolytic machining technology to form a regular micropore array, the micropore diameter D=100 μm, the micropore depth h=10 μm, and the micropore area occupancy rate S=20% .

[0037] 3) Using HF-HNO 3 The solution cleans the textured joint head to remove surface oxides;

[0038] 4) Perform the first step of plasma electrolytic oxidation treatment in the silicate / phosphate mixed electrolyte, the electrolyte contains 8g / L ...

Embodiment 3

[0042] A nano-Si 3 N 4 A method for preparing the surface texture of the particle-filled and sealed titanium alloy artificial joint head and a vitrified wear-resistant coating. The specific preparation steps are as follows:

[0043] 1) Polish the outer circular surface of the titanium alloy joint head;

[0044] 2) The mechanical indentation method was used to texture the titanium alloy joint head to form a regular micropore array. The micropore diameter D=1000 μm, the micropore depth h=55 μm, and the micropore area occupancy rate S=5%.

[0045] 3) Using HF-HNO 3 The solution cleans the textured joint head to remove surface oxides;

[0046] 4) The first step of plasma electrolytic oxidation treatment is carried out in the silicate / phosphate mixed electrolyte. The electrolyte contains 10g / L sodium silicate and 6g / L sodium phosphate. The power supply voltage is 600V, the pulse frequency is 800Hz, and the duty cycle 20%, processing time 30min;

[0047] 5) Containing nano-Si w...

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Abstract

The invention discloses a titanium alloy artificial articular head with wear-resistant ceramic coating and a preparation method of the titanium alloy artificial articular head. The titanium alloy artificial articular head comprises a titanium alloy articular head body, wherein a micropore array texture is formed on the surface of the titanium alloy articular head body, an antifriction and wear-resistant ceramic coating is arranged on the surface of the titanium alloy artificial articular head, and the surface layer of the antifriction and wear-resistant ceramic coating is a compact ceramic coating subjected to pore filling and sealing with hard nanoparticles; the microproe array texture is a regular micropore array which is formed in the surface where the titanium alloy articular head is in contact with a joint cup; and an oxidation ceramic coating is a hard oxidation layer prepared by adopting a two-step plasma electrolytic oxidation process and is compounded on a textured surface. The artificial articular head with the wear-resistant ceramic coating capable of improving lubricating property has the advantages that wear resistance is enhanced, and the wear of paired friction parts, namely cotyle, can be obviously reduced; meanwhile, toughness of the titanium alloy body is maintained, and cost is obviously lower than that of a full ceramic articular head.

Description

technical field [0001] The invention relates to an implant device and a preparation method thereof, in particular to a titanium alloy artificial joint head with a wear-resistant ceramic coating for improving lubrication performance and a preparation method thereof. Background technique [0002] Wear is the main factor for aseptic loosening and late failure of artificial joints. At present, artificial joint heads are mainly made of cobalt alloy and alumina ceramics. Ceramic ball heads have the advantages of high wear resistance and good wettability with joint synovial fluid. The inherent brittleness and high cost of ceramic ball heads affect their wide application. Although the cobalt alloy joint head has high wear resistance, due to poor lubrication in the body and poor wettability between metal and body fluid, it is difficult to form hydrodynamic lubrication at low sliding speeds, and it is often in a mixed lubrication state in the body. The coefficient is higher. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D5/38C25D5/18A61L27/32A61L27/50A61L27/00
Inventor 熊党生汪婧雅
Owner NANJING HONGSHENGJIAN BIOLOGICAL TECH
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