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Method for Composite Surface Modification of Pure Titanium

A composite surface, pure titanium technology, used in surface reaction electrolytic coatings, electrolytic coatings, coatings, etc., to achieve the effect of improving biological activity, improving mechanical properties, and refining material grains

Active Publication Date: 2018-08-31
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, the research of friction stir processing technology mainly focuses on light alloys such as aluminum and magnesium, which can improve the hardness and wear resistance of the alloy surface and the overall strength, plasticity and toughness of the material. Research is still in its infancy
However, the combination of micro-arc oxidation technology and friction stir processing technology to compound surface modification of titanium metal to prepare biomedical titanium metal has not yet been reported.

Method used

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  • Method for Composite Surface Modification of Pure Titanium
  • Method for Composite Surface Modification of Pure Titanium
  • Method for Composite Surface Modification of Pure Titanium

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0036] This embodiment relates to a method for surface modification of friction stir processing composite micro-arc oxidation, and the specific steps are as follows:

[0037] (a) Primary surface treatment of the material: the surface of a pure titanium sample with a thickness of 4 mm is polished, and cleaned with acetone to keep the surface of the sample clean.

[0038] (b) Fixing the processed sample: Fix the pure titanium sample on the fixture of the friction stir processing equipment, punch holes and lay a layer of silicon carbide (silicon carbide) particles. The hole diameter is 1mm, the depth is 2mm, and the silicon carbide particle size is 50nm.

[0039] (c) Friction stir processing process: set the process parameters of friction stir processing. During processing, use a high-speed rotating stirring needle to slowly insert into the surface of the workpiece until a certain pressure is generated between the shoulder of the stirring head and the surface of the workpiece, an...

Embodiment 2

[0043] This embodiment relates to a surface modification method of friction stir processing combined with micro-arc oxidation, and the specific steps refer to embodiment 1, the difference is as follows: the duty cycle is 10%. image 3 It is the scanning electron micrograph of the surface of the sample subjected to micro-arc oxidation on the surface of the friction stir processed sample (duty ratio is 10%).

Embodiment 3

[0045] This embodiment relates to a surface modification method of friction stir processing combined with micro-arc oxidation, and the specific steps refer to embodiment 1, the difference is as follows: the duty cycle is 15%. Figure 4 It is the scanning electron micrograph of the surface of the sample subjected to micro-arc oxidation on the surface of the friction stir processed sample (duty ratio is 15%).

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Abstract

The invention provides a method for conducting composite surface modification on pure titanium. The method includes the following steps that primary surface treatment is conducted on the pure titanium; the pure titanium is perforated, and nanoscale silicon carbide particles are laid; stir-friction longitudinal feeding machining is conducted, and a stir layer is formed; secondary surface treatment is conducted on the stir layer; and micro-arc oxidation treatment is conducted. The method has the advantages that by adding the nanoscale silicon carbide particles, the mechanical property of materials is improved; and micro-arc oxidation treatment continues to be conducted on the stir layer, so that a porous composite oxidation layer with biological activity is obtained.

Description

technical field [0001] The invention relates to a method for composite surface modification of pure titanium, specifically, adding silicon carbide particles to perform friction stir processing on titanium metal, and performing micro-arc oxidation surface treatment on the friction stir layer to obtain nanocomposite biomedical titanium alloys method. Background technique [0002] In the early 1950s, in the United Kingdom and the United States, pure titanium was first used to manufacture biomedical materials such as bone plates, hip joints, intramedullary nails and screws. However, it has been found clinically that the mechanical properties of hip joints and intramedullary nails made of pure titanium are poor and the surface is easy to wear, which is limited in application. It is only used in oral implant restoration and bone joint replacement with low load bearing. . At present, most studies focus on the construction of biologically active coatings on the surface of titanium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 马晓丽伍来智李雪璞陈秋龙王立强吕维洁
Owner SHANGHAI JIAOTONG UNIV