Preparation method of high-performance eutectic high-entropy alloy composite material

CN118223020BActive Publication Date: 2026-07-14JIANGSU UNIV

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: JIANGSU UNIV
Filing Date: 2024-03-21
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Traditional methods for preparing eutectic high-entropy alloys are complex and difficult to form stable two-phase structures. In particular, the preparation of ceramic-reinforced eutectic high-entropy alloy composites is even more difficult, which limits their application in industrial production.

Method used

Ceramic-reinforced FeCoCr and AlNi slabs were prepared by combining hot pressing sintering and laser melting with large plastic deformation hot rolling. They were then laminated by laser melting and multiple large plastic deformation hot rolling processes to form a stable eutectic high-entropy alloy composite material.

Benefits of technology

The prepared eutectic high-entropy alloy composite material has a uniform microstructure, a room temperature tensile strength of 1150–1260 MPa, and an elongation of 14.8%–17.3%, exhibiting good strength and toughness properties, and is suitable for practical working conditions.

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Abstract

The application provides a method for preparing a eutectic high-entropy alloy composite material. In the application, a ceramic-reinforced FeCoCr slab and a ceramic-reinforced AlNi slab are prepared by using a hot-pressing sintering method respectively, then the ceramic-reinforced FeCoCr slab and the ceramic-reinforced AlNi slab are subjected to surface treatment by using a laser melting method, and then the ceramic-reinforced FeCoCr slab and the ceramic-reinforced AlNi slab are stacked together by using a multi-pass large plastic deformation hot rolling to obtain the eutectic high-entropy alloy composite material. Since the ceramic-reinforced FeCoCr slab and the ceramic-reinforced AlNi slab are prepared respectively, the FeCoCr and the AlNi do not affect each other during the formation process, and the influence of the ceramic phase on the simultaneous formation of the dual-phase structure can also be avoided. In addition, the surface treatment of the slab by using the laser melting technology and the large deformation rolling technology can fully combine the ceramic-reinforced FeCoCr slab and the ceramic-reinforced AlNi slab without affecting the phase composition. Therefore, the eutectic high-entropy alloy composite material prepared by the application has stable microstructure and good strength and toughness.

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