Method for preparing bioactive coating on titanium alloy surface

Abstract

The invention discloses a method for preparing a bioactive coating on a titanium alloy surface, which comprises the following steps of: taking the titanium alloy as a matrix, and then putting titanium alloy into micro-arc oxidation electrolyte for micro-arc oxidation, later implementing alkali heat treatment on the titanium alloy after micro-arc oxidation treatment, and finally obtaining the titanium alloy with the bioactive coating attached on the surface. The method has the advantages that by learning from the strong points of others and making up self-deficiencies, and then directly preparing a film with high matrix combination strength on the titanium alloy surface by micro-arc oxidation, and later conducting alkali heat treatment for improving the biological activity of the micro-arc oxidation film, the coating better solves the problems of combination strength, wear resistance, decay resistance, biological activity and the like.

Description

Technical field:

[0001] The invention belongs to a method for preparing a bioactive coating on the surface of a titanium alloy, and in particular relates to a method for preparing a bioactive coating rich in Ca and P on the surface of a titanium alloy by using micro-arc oxidation technology, and further improving the micro-arc oxidation by an alkali heat treatment process. The bioactivity of the film, the prepared coating can rapidly grow the hydroxyapatite coating in the simulated body fluid. Background technique:

[0002] Titanium and titanium alloys are currently the most attractive metals due to their excellent mechanical properties such as low density and low elastic modulus, excellent biocompatibility, high corrosion resistance, and good integration with organisms. biomaterials. However, due to the fact that the composition of titanium and its alloys is completely different from that of human tissues, when they are used as hard tissue implants, they are mechanically i...