A high-entropy alloy coating for improving mechanical properties and biocompatibility of titanium alloys and a preparation method thereof

The TiTaNbMoFe high-entropy alloy coating prepared by mechanical alloying solves the problems of biocompatibility, wear resistance and corrosion resistance of Ti6Al4V alloy, realizes a low-cost high-performance coating, avoids the release of harmful elements, and improves biocompatibility and wear resistance.

CN118109773BActive Publication Date: 2026-06-30CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGZHOU UNIV
Filing Date
2023-12-06
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing high-entropy alloy coatings present challenges in improving the biocompatibility, wear resistance, and corrosion resistance of Ti6Al4V alloys, and are also costly. Furthermore, common medical metal materials release harmful elements into the human body, affecting health.

Method used

TiTaNbMoFe high-entropy alloy powder was prepared by mechanical alloying and then deposited onto the surface of Ti6Al4V substrate by plasma spraying technology to form a high-entropy alloy coating. This avoids the segregation of low-melting-point elements and ensures compositional uniformity and biocompatibility.

Benefits of technology

It achieves improved wear resistance, corrosion resistance and biocompatibility of Ti6Al4V alloy at low cost, avoids the release of harmful elements, and the cell proliferation effect on the coating surface is better than that of Ti6Al4V, and the cost is lower.

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Abstract

This invention relates to the field of bioalloys, disclosing a high-entropy alloy coating for improving the mechanical properties and biocompatibility of titanium alloys and its preparation method, particularly suitable for coatings of orthopedic implants. The high-entropy alloy coating is composed of five metallic elements: Ti, Ta, Nb, Mo, and Fe. Powders are weighed in different molar ratios and milled using stainless steel grinding balls as the milling medium in a stainless steel container to prepare high-entropy alloy powder. The high-entropy alloy powder prepared by this invention is produced using a mechanical alloying method, resulting in a large amount of solid solution (BCC phase) in the alloy powder phase. The powder composition is uniformly distributed, and the powder particle size is small, with the smallest particle size being only a few micrometers. The preparation process is simple. Using this powder as raw material, it is deposited onto a Ti6Al4V substrate using plasma spraying technology. This coating exhibits excellent biocompatibility, high wear resistance, and corrosion resistance, compensating for the shortcomings of commonly used clinical metallic materials.
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