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Nickel-titanium memory patella claw and preparation method thereof

A patella and memory technology, applied in ion implantation plating, coating, medical science, etc., can solve the problems of low hardness of the film, easy peeling of the film, poor bonding force of pure zirconium and pure titanium films to the substrate, etc., to achieve High bonding strength, improved biocompatibility and corrosion resistance, strong bonding effect

Inactive Publication Date: 2010-08-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion between pure zirconium and pure titanium films and the substrate is not very good, and the films are easy to peel off; in addition, the hardness of the films is also low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The surface of the metal substrate of the nickel-titanium memory patella claw of the invention has a layer of Ti / ZrTiN gradient coating with good biocompatibility and corrosion resistance. The mentioned Ti / ZrTiN gradient coating has a double-layer structure, which is composed of a Ti layer and a ZrTiN surface layer in contact with the surface of the nickel-titanium memory patella claw. The thickness of the Ti bottom layer is 0.15-0.2 μm; the thickness of the ZrTiN surface layer is 2-2.5 μm , the phases in the ZrTiN film mainly include ZrN and TiN, and a small amount of (Zr, Ti)N solid solution, ZrO 2 and TiO 2 . According to the scratch test, the film-substrate bonding force of the Ti / ZrTiN film is 146N. Its preparation steps are as follows:

[0022] 1) First, process the patella claw with nickel-titanium memory alloy;

[0023] 2) the preparation method of the nickel-titanium memory patella claw of described surface magnetron sputtering Ti / ZrTi (C, N) gradient coati...

Embodiment 2

[0028] The surface of the metal substrate of the nickel-titanium memory patella claw of the invention has a layer of Ti / ZrTiC gradient coating with good biocompatibility and corrosion resistance. The Ti / ZrTiC gradient coating mentioned has a double-layer structure, which is composed of a Ti layer and a ZrTiC surface layer in contact with the surface of the nickel-titanium memory patella claw. The thickness of the Ti bottom layer is 0.15-0.2 μm; the thickness of the ZrTiC surface layer is 2-2.5 μm μm, the phase in the ZrTiC film is a mixture of ZrC and TiC. According to the scratch test curve, the film-substrate bonding force of the Ti / ZrTiC film is 176N. Its preparation steps are as follows:

[0029] 1) First, process the patella claw with nickel-titanium memory alloy;

[0030] 2) the preparation method of the nickel-titanium memory patella claw of described surface magnetron sputtering Ti / ZrTi (C, N) gradient coating, it is characterized in that surface pretreatment adopts ...

Embodiment 3

[0035] The metal substrate surface of the nickel-titanium memory patella claw of the invention has a layer of Ti / ZrTiCN gradient coating with good biocompatibility and corrosion resistance. The Ti / ZrTiCN gradient coating mentioned has a double-layer structure, which is composed of a Ti layer and a ZrTiCN surface layer in contact with the surface of the nickel-titanium memory patella claw, and the thickness from the bottom layer of Ti is 0.15-0.2 μm; the thickness of the ZrTiCN surface layer is 1-1.5 μm. μm, the phases in the ZrTiCN film are ZrCN and TiCN. According to the scratch test curve, the film-substrate bonding force of Ti / ZrTiCN film is 123N. Its preparation steps are as follows:

[0036] 1) First, process the patella claw with medical nickel-titanium memory alloy;

[0037] 2) the preparation method of the nickel-titanium memory patella claw of described surface magnetron sputtering Ti / ZrTi (C, N) gradient coating, it is characterized in that surface pretreatment ado...

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Abstract

The invention relates to a nickel-titanium memory patella claw with a Ti / ZrTi(C,N) gradient coating on the surface through magnetron sputtering, in particular to a nickel-titanium memory patella claw with a Ti / ZrTi(C,N) gradient coating having good biocompatibility on the surface and a preparation method thereof. The surface of a metal matrix of the nickel-titanium memory patella claw is provided with the Ti / ZrTi(C,N) gradient coating with good biocompatibility, wherein the Ti / ZrTi(C,N) gradient coating has a double-layer structure and consists of a Ti intermediate layer which is contacted with the surface of the nickel-titanium memory patella claw and a ZrTi(C,N) surface layer; the thickness of the Ti intermediate layer is 0.1 to 0.5 mu m; and the thickness of the ZrTi(C,N) surface layer is 1.0 to 5.0 mu m. The preparation method comprises the following steps: 1) processing the patella claw with a nickel-titanium memory alloy; and 2) performing surface treatment on the nickel-titanium memory patella claw, and performing two-step magnetron sputtering treatment to obtain the Ti / ZrTi(C,N) gradient coating consisting of the Ti intermediate layer and the ZrTi(C,N) surface layer in sequence on the surface of the patella claw.

Description

technical field [0001] The invention relates to a nickel-titanium memory patellar claw and a preparation method thereof, in particular to a nickel-titanium memory patellar claw with a Ti / ZrTi(C, N) gradient coating on the surface with good biocompatibility and wear resistance The preparation method thereof belongs to the technical field of medical equipment. Background technique [0002] At present, nickel-titanium memory patellar claws are widely used in the fixation of patella fractures. However, because nickel-titanium memory alloys contain nearly 50% atomic percentage of carcinogenic Ni elements, the medical community has no choice but to use nickel-titanium alloys as human implants. There are widespread concerns about the safety of Ni, which will cause allergic reactions and tissue necrosis. Recently, there have also been clinical reports of sensitization of nickel-titanium alloy medical devices. In addition, the appearance of the currently used nickel-titanium memory...

Claims

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Application Information

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IPC IPC(8): A61L31/08A61L31/02C23C14/35C23C14/16
Inventor 储成林苏理成余凤丹郭超盛晓波董寅生林萍华
Owner SOUTHEAST UNIV
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