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Method for plating tantalum on TiNi alloy surface

A technology of alloy and coating machine, which is applied in the field of tantalum plating on the surface of alloys, and can solve problems such as poor corrosion resistance

Inactive Publication Date: 2009-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor corrosion resistance of existing TiNi alloys implanted in the human body for a long time, and to provide a method for plating tantalum on the surface of TiNi alloys

Method used

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  • Method for plating tantalum on TiNi alloy surface
  • Method for plating tantalum on TiNi alloy surface
  • Method for plating tantalum on TiNi alloy surface

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specific Embodiment approach 1

[0008] Specific Embodiment 1: The method for plating tantalum on the surface of TiNi alloy in this embodiment is realized according to the following steps: 1. Mechanically polish the TiNi alloy, then put it into acetone for ultrasonic cleaning for 20-60 minutes, and then dry it; 2. TiNi after drying The alloy is put into the multi-arc ion coating machine, and the vacuum is evacuated until the pressure of the multi-arc ion coating machine is 10 -4 ~10 -5 Pa, and then introduce argon gas until the pressure in the furnace is 0.2-0.3Pa, apply a negative bias voltage of 800-1100V to the TiNi alloy, and perform sputtering cleaning until the TiNi alloy reaches 300-400°C; Under the conditions of 70-80A and negative bias of 100-500V, bombard the TiNi alloy treated in step 2 with tantalum ions and deposit it. The deposition time is 30-160min, and then cool to room temperature; 4. Vacuum at 800-1000°C Anneal for 30 to 90 minutes to obtain a tantalum-plated TiNi alloy.

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, ultrasonic cleaning is performed for 30-50 minutes. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, ultrasonic cleaning is performed for 40 minutes. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for plating tantalum on the surface of TiNi alloy. The method solves the problem that the corrosion resistance property is poor when the TiNi alloy is implanted into the human body for a long time. The method comprises the follow steps: firstly, the TiNi alloy is mechanically polished, ultrasonically cleaned and dried; secondly, the sputter cleaning is carried out; thirdly, tantalum ions are used for bombarding the TiNi alloy which is then deposited and cooled to room temperature; and fourthly, the tantalum-plated TiNi alloy is just obtained after vacuum annealing. The tantalum-plated TiNi alloy prepared by the method has good corrosion resistance property, restricts Ni ions from dissolving out simultaneously and improves the biocompatibility. The invention has simple production process and convenient operation.

Description

technical field [0001] The invention relates to a method for plating tantalum on the surface of an alloy. Background technique [0002] TiNi alloy has been widely used in the field of biomedicine because of its excellent shape memory and superelastic properties, good corrosion resistance and biocompatibility, and has a very broad prospect. One of the most promising medical applications of TiNi alloys is cardiovascular stents. TiNi alloy stents are easy to achieve self-expansion and constant elastic support, and have the advantages of simple operation, easy fixation, good adhesion to the vessel wall, and uniform force. The corrosion performance and biocompatibility of biomaterials mainly depend on the surface properties of the materials. The reason why TiNi alloy has good corrosion resistance and biocompatibility is that a layer of dense TiO is spontaneously formed on its surface. 2 Passivation film, but the thickness of this spontaneously formed oxide film is only about 2-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/24C23C14/34C23C14/02C23C14/14C23C14/58
Inventor 高智勇成艳隋解和蔡伟吴冶
Owner HARBIN INST OF TECH
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