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Self-lubricating wear-resistant compound coating on surfaces of titanium and titanium alloy and preparation method thereof

A composite coating and titanium alloy technology, applied in the direction of surface reaction electrolytic coating, device for coating liquid on the surface, coating, etc., can solve the problems of poor wear resistance, etc., achieve a wide range of applications, reduce wear, and wear resistance Grinding performance improvement effect

Inactive Publication Date: 2017-10-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of poor wear resistance caused by low surface hardness and high friction coefficient of titanium and titanium alloys, the invention provides a self-lubricating and wear-resistant composite coating on the surface of titanium and titanium alloys with high bonding strength, high surface hardness and low friction coefficient and its preparation process

Method used

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  • Self-lubricating wear-resistant compound coating on surfaces of titanium and titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Use sandpaper or grinding wheels with a particle size of less than 600 mesh to polish the surface of titanium and titanium alloy parts to remove defects with large surface sizes, so that the surface roughness is lower than 0.1, and use a polishing cloth to polish the surface of titanium and titanium alloy parts to form a mirror surface.

[0030] (2) Use a chemical solution containing 20-30g / L of nitric acid and 10-15g / L of hydrofluoric acid to fully clean titanium and titanium alloys at 25-35°C for 5-10 minutes, and then use ethanol to clean them for 10 minutes under the action of ultrasonic waves. After more than a minute, take it out, rinse it under running water, and dry it.

[0031] (3) Use a Nd:YAG pulse-based light puncher to punch holes on the surface of the sample after the treatment in step (2).

[0032] (4) The sodium aluminate-sodium phosphate system is used as the electrolyte.

[0033] (5) Plasma electrolytic oxidation treatment is performed on the surf...

Embodiment 2

[0039] (1) Use sandpaper or grinding wheels with a particle size of less than 600 mesh to polish the surface of titanium and titanium alloy parts to remove defects with large surface sizes, so that the surface roughness is lower than 0.1, and use a polishing cloth to polish the surface of titanium and titanium alloy parts to form a mirror surface.

[0040](2) Use a chemical solution containing 20-30g / L of nitric acid and 10-15g / L of hydrofluoric acid to fully clean titanium and titanium alloys at 25-35°C for 5-10 minutes, and then use ethanol to clean them for 10 minutes under the action of ultrasonic waves. After more than a minute, take it out, rinse it under running water, and dry it.

[0041] (3) Use a Nd:YAG pulse-based light puncher to punch holes on the surface of the sample after the treatment in step (2).

[0042] (4) The sodium aluminate-sodium phosphate system is used as the electrolyte.

[0043] (5) Plasma electrolytic oxidation treatment is performed on the surfa...

Embodiment 3

[0049] (1) Use sandpaper or grinding wheels with a particle size of less than 600 mesh to polish the surface of titanium and titanium alloy parts to remove defects with large surface sizes, so that the surface roughness is lower than 0.1; use a polishing cloth to polish the surface of titanium and titanium alloy parts to form a mirror surface.

[0050] (2) Use a chemical solution containing 20-30g / L of nitric acid and 10-15g / L of hydrofluoric acid to fully clean titanium and titanium alloys at 25-35°C for 5-10 minutes, and then use ethanol to clean them for 10 minutes under the action of ultrasonic waves. After more than a minute, take it out, rinse it under running water, and dry it.

[0051] (3) Use a Nd:YAG pulse-based light puncher to punch holes on the surface of the sample after the treatment in step (2).

[0052] (4) Using sodium silicate-sodium phosphate system as electrolyte;

[0053] (5) Plasma electrolytic oxidation treatment is performed on the surface textured ti...

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Abstract

The invention discloses a self-lubricating wear-resistant compound coating on surfaces of titanium and titanium alloy and a preparation method thereof. The compound coating comprises a surface of a titanium and titanium alloy substrate, an oxidized ceramic coating and a self-lubricating coating which are successively connected. The titanium and titanium alloy substrate has a textured surface pre-treated by a Nd:YAG pulse laser puncher, the oxidized ceramic coating is a hard oxidized ceramic coating generated by means of plasma electrolytic oxidation, and the self-lubricating coating is an ultra high molecular weight polyethylene coating doped with graphene. By adding graphene into the ultra high molecular weight polyethylene coating to form a laminar compound structure, the surface wettability of the coating is improved, the frictional coefficient and the wear rate of the coating are reduced, and the frictional property of the surface of the coating is improved. According to the invention, the wear-resistant compound coating which is high in hardness and low in frictional coefficient and the wear rate can be prepared on the surface of the titanium and titanium alloy, and the coating is level, smooth and compact in surface and has good wear-resistant and corrosion-resistant properties.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and relates to surface coating strengthening treatment of titanium alloys, in particular to a self-lubricating and wear-resistant composite coating on the surface of titanium and titanium alloys and a preparation method thereof. Background technique [0002] An artificial joint is an implanted prosthesis made to simulate the human body environment, which can replace damaged joints, relieve joint pain, and restore normal joint function. Artificial joint materials are medical implants, which not only require good biocompatibility, but also have good enough wear resistance, so that they can work normally in the human body environment, and can be used for a long time without wear and tear. [0003] Titanium and titanium alloys have the advantages of low density, good corrosion resistance, and high strength, and have been widely used in aerospace, chemical industry, and biological materials....

Claims

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Application Information

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IPC IPC(8): A61L27/06A61L27/40A61L27/30A61L27/34C25D11/26B05D1/18B05D3/02B05D3/00B05D5/08
CPCA61L27/06A61L27/30A61L27/303A61L27/34A61L2430/24B05D1/18B05D3/002B05D3/0254B05D5/08C25D11/026C25D11/26C08L23/06
Inventor 熊党生金琦童刘昀彤
Owner NANJING UNIV OF SCI & TECH
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