Wide-temperature-range self-adaptive anti-friction and anti-wear chromium-containing refractory high-entropy alloy material and preparation method thereof

By introducing chromium into refractory high-entropy alloys to form a protective oxide film, the problem of insufficient oxidation resistance at high temperatures is solved, and the adaptive friction reduction and wear resistance are improved, making it suitable for aerospace components.

CN121472678APending Publication Date: 2026-02-06NORTHWESTERN POLYTECHNICAL UNIV
0 Cites 0 Cited by

Patent Information

Application Number
CN202511651138.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-12
Publication Date
2026-02-06

AI Technical Summary

Technical Problem

Existing refractory high-entropy alloys have insufficient oxidation resistance at high temperatures, which leads to easy powdering and failure of the material surface, increased friction coefficient, and increased surface roughness of the worn surface, thus limiting their application in aerospace propulsion systems.

Method used

By introducing chromium into a refractory high-entropy alloy, a BCC-structured matrix phase and a titanium-rich precipitate phase are formed, generating a protective oxide film. The adaptive friction-reducing and wear-resistant chromium-containing refractory high-entropy alloy material is prepared by spark plasma sintering.

Benefits of technology

It significantly improves the oxidation resistance of alloys over a wide temperature range, generates a continuous and dense oxide layer, reduces the coefficient of friction and wear rate, and is suitable for key components in the aerospace field.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a wide-temperature-range self-adaptive friction-reducing and wear-resistant chromium-containing refractory high-entropy alloy material and a preparation method thereof, and belongs to the technical field of wear-resistant alloy materials, and the high-entropy alloy material comprises the following raw materials in percentage by mass: Ta, Mo, Ti and Cr. The preparation method comprises the steps that Ta powder, Mo powder, Ti powder and Cr powder are weighed by mass, ball milling is conducted, then sintering is conducted through a spark plasma sintering method, and the wide-temperature-range self-adaptive anti-friction and anti-wear chromium-containing refractory high-entropy alloy material is obtained. By introducing the chromium element, the alloy can adaptively form an oxide layer with lubrication and protection effects in a wide temperature range from room temperature to ultrahigh temperature, so that the alloy shows excellent tribological performance and has extremely low friction coefficient and wear rate. The material has a wide application prospect in the fields of wear-resistant lubricating materials and high-temperature wear-resistant parts.
Need to check novelty before this filing date? Find Prior Art