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Method for preparing diamond-like coating on surface of biological medical NiTi alloy

A diamond coating, biomedical technology, applied in metal material coating process, coating, ion implantation plating and other directions, can solve the problems of insufficient surface mechanics and biological properties of biomedical NiTi alloys

Inactive Publication Date: 2009-09-16
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] Based on the deficiencies of the above-mentioned various surface modification and coating preparation methods, the object of the present invention is to provide a new method for preparing a diamond-like coating with strong bonding force and excellent mechanical and biological properties on the surface of the biomedical NiTi alloy. method, the diamond-like coating prepared by this method is expected to fundamentally solve the problem of insufficient surface mechanical and biological properties of biomedical NiTi alloys

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  • Method for preparing diamond-like coating on surface of biological medical NiTi alloy
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  • Method for preparing diamond-like coating on surface of biological medical NiTi alloy

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[0024] The present invention is described in further detail below in conjunction with accompanying drawing:

[0025] see figure 1 , 2 , 3, 4, 5, a method for preparing a diamond-like coating on the surface of a biomedical NiTi alloy:

[0026] (1) Cut the NiTi alloy plate with the last cold rolling deformation of 10% and the annealing process of 450 ° C × 30 min into a rectangular parallelepiped sample of 15 mm × 15 mm × 1.5 mm (length 15 mm, width 15 mm, height 1.5 mm) as the substrate , after surface degreasing and polishing, immerse in acetone for ultrasonic cleaning, and alcohol dehydration.

[0027] (2) Put the pretreated substrate as the substrate material into the arc-enhanced magnetron sputtering ion coating equipment. Such as figure 1 As shown, the arc-enhanced magnetron sputtering coating equipment at least includes a vacuum chamber 1, a turret 2, a bias voltage 3, a turret rod 4, a flat C (carbon) target 5, a permanent magnet 6, a column arc Ti target 7, a heatin...

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Abstract

The invention discloses a method for preparing a diamond-like coating on the surface of biological medical NiTi alloy. The method comprises the following steps that: a pre-treated basal body is put on a rotary hack lever of electrical arc reinforced magnetron sputtering ion filming equipment, and a planar C target is arranged on the inner wall of a furnace body in a mode of planar target; a vacuum chamber is introduced into argon gas to clean the vacuum chamber and the pre-treated basal body; the surface of the basal body is plated with a Ti base layer after cleaning, and a TiC transition layer is prepared; and the diamond-like coating is prepared and obtained on the TiC transition layer on the surface of the basal body. For the diamond-like coating prepared by the method, the hardness reaches 25 to 30Gpa, the film base binding force reaches 48 to 60N, and the corrosion resisting property is obviously better than that of the NiTi alloy; moreover, the method can obviously improve the mechanical and biological properties of the biological medical NiTi alloy.

Description

Technical field: [0001] The invention belongs to the field of coating material preparation, and relates to a method for preparing a diamond-like coating with excellent mechanical and biological properties on the surface of a biomedical NiTi alloy. Background technique: [0002] Near equiatomic NiTi (50.8at.%Ni) alloy (hereinafter referred to as NiTi alloy) has unique shape memory effect and superelastic behavior, so it has broad application prospects in minimally invasive interventional medicine, orthopedic surgery and other medical fields. However, after the exposed NiTi alloy is implanted into the human body, there are problems such as high friction coefficient with human tissue, poor blood compatibility and corrosion performance. [0003] In order to solve the above problems, the commonly used method at home and abroad is to modify the surface of NiTi alloy. Common methods of surface modification include ion implantation, high temperature oxidation, and deposition coatin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/02C23C14/06
Inventor 马胜利杭瑞强
Owner XI AN JIAOTONG UNIV
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