Method for preparing Cu doped TiN alloy layer on surface of titanium alloy

Abstract

The invention discloses a method for preparing a Cu doped TiN alloy layer on the surface of a titanium alloy, which comprises the following steps of: firstly, placing a base material and a target material into a plasma surface alloying furnace, carrying out pre-sputtering processing on the surface of the titanium alloy, and removing surface stains and a passivation layer; then, simultaneously, starting a source electrode and a workpiece voltage, carrying out sputtering on the source electrode through argon ions and carrying out deposition and diffusion on metal ions so as to form a Cu-containing alloy layer on the surface of the titanium alloy; and finally, feeding nitrogen gas into the furnace, and carrying out thermal insulation on the obtained product so as to form a Cu doped TiN alloy layer on the surface of the titanium alloy. A modified layer on the surface of a titanium alloy has a good sterilization effect, the surface hardness is significantly improved, and the wear resistance is significantly improved; and the method is simple in operation, good in repeatability and low in cost, and can be widely used for improving the antibacterial and wear-resisting properties of the surface of the titanium alloy.

Description

technical field [0001] The invention relates to a method for preparing an alloy layer on the surface of a titanium alloy, in particular to a method for preparing a Cu-doped TiN alloy layer on the surface of a titanium alloy, which belongs to the surface modification of metal materials. Background technique [0002] Titanium alloys have the advantages of low density, high specific strength, corrosion resistance, and good biocompatibility, and are widely used in biomedical fields, such as medical devices, implants for bone replacement materials, etc. However, the infection problem during the clinical use of titanium alloy is one of the most concerned issues for scientific researchers, and its low hardness and poor wear resistance also limit its application to a certain extent. Therefore, how to make titanium alloy have antibacterial properties and improve its wear resistance has become one of the hot spots of domestic and foreign scholars' attention and research. [0003] In ...

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Problems solved by technology

However, the modified layer prepared by ion implantation is generally thin, and it is easy to be worn during use, so that the titanium alloy loses its antibacterial properties.

The properties of antibacterial and wear-resistant films, coatings and substrate materials are very different, and the cooperative deformation ability is weak, and cracking and peeling of the modified layer are prone to occur

[0005] In the prior art, plasma surface alloying is adopted. For example, the publication number is CN10267698A, which discloses a "preparation method of copper-infiltrated layer on the surface of titanium alloy", which uses pure Cu as the source, and can form a certain thickness of Cu alloy on the surface of titanium alloy. layer, but the Cu sputtering rate is high, and a high content of Cu coating is often formed on the surface of the titanium alloy during the alloying process, which deteriorates the corrosion resistance of the titanium alloy surface

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