Method for preparing soft and hard alternate bionic coating on surface of medical titanium alloy by utilizing composite treatment of micro-arc oxidation and laser nitridation

A technology of micro-arc oxidation and laser nitriding, applied in surface reaction electrolytic coatings, coatings, electrolytic coatings, etc. performance improvement effect and other issues, to achieve the effect of improving surface biological activity, adjusting friction performance, and reducing friction coefficient

Active Publication Date: 2022-01-07
ZHEJIANG UNIV OF TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the design process, increasing the replacement area of ​​the micro-arc oxidation film layer by titanium nitride will reduce the effect of improving the biological activity and antibacterial performance of the micro-arc oxidation treatment, and reducing the replacement area will reduce the effect of laser nitriding. The effect of improving the wear resistance of the belt

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing soft and hard alternate bionic coating on surface of medical titanium alloy by utilizing composite treatment of micro-arc oxidation and laser nitridation
  • Method for preparing soft and hard alternate bionic coating on surface of medical titanium alloy by utilizing composite treatment of micro-arc oxidation and laser nitridation
  • Method for preparing soft and hard alternate bionic coating on surface of medical titanium alloy by utilizing composite treatment of micro-arc oxidation and laser nitridation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Pre-treatment of the titanium alloy, including sandpaper step by step grinding to 2000#, cleaning and drying.

[0031] 2) Configure the electrolyte: the electrolyte composition is: C 4 h 6 CaO 4 8g / L, Na 2 HPO 4 4.3g / L, NaOH 2g / L, AgNO 3 1g / L, the solvent is deionized water;

[0032] 3) Set the micro-arc oxidation process: pulse power supply current density 5A / dm 2 , The pulse frequency is 250Hz, the duty cycle is 10%, the processing time is set to 20min, and the micro-arc oxidation treatment is carried out;

[0033] 4) Put the sample after micro-arc oxidation into the atmosphere protection box, set the flow ratio of nitrogen and argon to 0.3:1, and the total flow of the mixed gas to 20L / min;

[0034] 5) Set the side length of the square laser nitriding treatment area as l=1mm, and the interval between adjacent squares is h=2mm;

[0035] 6) Set the laser nitriding process: laser power 300W, scanning speed 500mm / s, scanning distance 0.06mm, for nitriding pro...

Embodiment 2

[0038] 1) Pre-treatment of the titanium alloy, including sandpaper step by step grinding to 2000#, cleaning and drying.

[0039] 2) Configure the electrolyte: the electrolyte composition is: C 4 h 6 CaO 4 8g / L, Na 2 HPO 4 4.3g / L, NaOH 2g / L, AgNO 3 1g / L, the solvent is deionized water;

[0040] 3) Set the micro-arc oxidation process: pulse power supply current density 5A / dm 2 , The pulse frequency is 250Hz, the duty cycle is 10%, the processing time is set to 20min, and the micro-arc oxidation treatment is carried out;

[0041] 4) Put the sample after micro-arc oxidation into the atmosphere protection box, set the flow ratio of nitrogen and argon to 0.3:1, and the total flow of the mixed gas to 20L / min;

[0042] 5) Set the side length of the square laser nitriding treatment area as l=3mm, and the interval between adjacent squares is h=8mm;

[0043] 6) Set the laser nitriding process: laser power 300W, scanning speed 500mm / s, scanning distance 0.06mm, for nitriding pro...

Embodiment 3

[0046] 1) Pre-treatment of the titanium alloy, including sandpaper step by step grinding to 2000#, cleaning and drying.

[0047] 2) Configure the electrolyte: the electrolyte composition is: C 4 h 6 CaO 4 16g / L, Na 2 HPO 4 8.50g / L, NaOH 3g / L, AgNO 3 2g / L, the solvent is deionized water;

[0048] 3) Set the micro-arc oxidation process: pulse power supply current density 9A / dm 2 , The pulse frequency is 250Hz, the duty cycle is 30%, the processing time is set to 15min, and the micro-arc oxidation treatment is carried out;

[0049] 4) Put the sample after micro-arc oxidation into the atmosphere protection box, set the flow ratio of nitrogen and argon to 1:1, and the total flow of the mixed gas to 35L / min;

[0050] 5) Set the side length of the square laser nitriding treatment area as l=2mm, and the interval between adjacent squares is h=4mm;

[0051] 6) Set the laser nitriding process: laser power 500W, scanning speed 1000mm / s, scanning distance 0.08mm, for nitriding p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing a soft and hard alternate bionic coating on the surface of a medical titanium alloy by utilizing composite treatment of micro-arc oxidation and laser nitridation. The method mainly utilizes micro-arc oxidation and laser nitridation to conduct composite treatment on the surface of the medical titanium alloy so as to solve the problems of poor surface wear resistance, poor biological activity and the like of a medical titanium alloy implant in a human body environment. According to the method, laser nitridation does not need pretreatment, a nitriding layer is directly processed and prepared on a micro-arc oxidation coating, the micro-arc oxidation coating can improve the biological activity, the antibacterial property and the wear resistance of the material surface, a nitriding layer coating can improve the wear resistance and the antibacterial property of the material surface, and in combination with the bionics principle, the soft (micro-arc oxidation coating) and hard (titanium nitride coating) alternate bionic surface can effectively improve the surface wear resistance of the titanium alloy material, and the friction performance of the titanium alloy surface can be controllably adjusted by adjusting the surface ratio of the micro-arc oxidation coating to the titanium nitride coating.

Description

technical field [0001] The invention relates to a method for preparing a soft and hard bionic coating on the surface of medical titanium alloy by micro-arc oxidation combined with laser nitriding, which relates to micro-arc oxidation and laser nitriding technology, and is used to improve the wear resistance and biological activity of the surface of medical titanium alloy and antibacterial properties. Background technique [0002] Artificial joint replacement is the most effective way to restore joint function in patients. However, the functions of human joints are very complex, with the ability to move in multiple directions, and they need to bear various loads such as tension, compression, and torsion. Therefore, artificial joint materials must have good wear resistance, and at the same time, the material must also meet good biological activity and antibacterial properties. Titanium alloy has low density, high specific strength, good corrosion resistance and fatigue resis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D5/02C25D5/18C25D21/12
CPCC25D11/26C25D5/024C25D5/18C25D21/12
Inventor 姚建华王晔吴国龙张群莉王梁陈智君董刚姚喆赫李波杨高林
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap