Method for preparing praseodymium-doped titanium nitride coating on surface of medical titanium alloy

Abstract

The invention discloses a method for preparing a praseodymium-doped titanium nitride coating on the surface of a medical titanium alloy. The method comprises the following steps: preparing a titanium nitride coating on the surface of the medical titanium alloy by utilizing a magnetron sputtering method; transferring the medical titanium alloy with the titanium nitride coating into a vacuum chamber A of a plasma-immersion-type ion implanter under the condition that a praseodymium target and a sample disk A are respectively arranged at two ends of the inside of the vacuum chamber A; fixing the medical titanium alloy with the titanium nitride coating on the sample disk A; regulating the vacuum degree of the vacuum chamber A under the condition that the praseodymium target is taken as an ion source of a cathode; regulating the rotating speed of the sample disk A and cooling the sample disk A in a water-cooling manner; and then, carrying out praseodymium ion implantation at a room temperature, thereby obtaining the praseodymium-doped titanium nitride coating prepared on the surface of the medical titanium alloy. According to the method disclosed by the invention, the corrosion resistance of the prepared praseodymium-doped titanium nitride coating is obviously superior to that of a common titanium nitride coating; the breeding and the spreading of a large quantity of vascular endothelial cells in the praseodymium-doped titanium nitride coating can be carried out, so that the biological performance of the medical titanium alloy is obviously improved.

Description

【Technical field】 [0001] The invention belongs to the field of preparation of coating materials, in particular to a method for preparing a praseodymium-doped titanium nitride coating on the surface of a medical titanium alloy. 【Background technique】 [0002] Cardiovascular system diseases are a kind of diseases that seriously threaten human life. At present, due to the limitation of the number of suitable organ transplants and the regeneration technology of human organs, the medical field mainly relies on titanium alloy materials such as vascular stents, artificial heart valves, and kidney filters. Implants to help patients treat diseases, these titanium alloy materials are also known as medical titanium alloy biomaterials. Biomaterials must possess good cell compatibility, corrosion resistance, and appropriate mechanical strength. The above-mentioned properties can be influenced by the surface characteristics of biomaterials. Surface chemical and physical characteristics,...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a praseodymium-doped titanium nitride coating on the surface of a medical titanium alloy for the deficiencies of the prior art. The praseodymium-doped titanium nitride coating prepared by the method fundamentally solves the problem of Solved the problems of blood corrosion resistance and insufficient biological performance on the surface of medical titanium alloy

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