High-speed-shearing-resistant low-density multi-principal-element intermetallic compound and preparation method thereof

By developing multi-main intermetallic compounds composed of Ti, Al, Nb and V, and using high-vacuum arc smelting and vacuum hot pressing sintering processes, low-density and high-strength materials with a single B2 phase are prepared, which solves the problem of high brittleness in extreme environments and improves the resistance to high-speed shearing ability and strength on the basis of low density.

CN119736519APending Publication Date: 2025-04-01NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202411357046.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-27
Filing Date
2024-09-27
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

Existing intermetallic compounds are highly brittle in extreme environments with high temperature, high pressure and high strain rates, and are difficult to meet the higher requirements of new weapons and equipment and industrial production for the comprehensive mechanical properties of high-temperature materials.

Method used

A multi-main intermetallic compound composed of Ti, Al, Nb and V was developed, and a low-density high-strength intermetallic compound composed of a single B2 phase was prepared by non-consumable high-vacuum arc smelting and vacuum hot pressing sintering.

Benefits of technology

It has achieved the improvement of the material's high-speed shear resistance and strength on the basis of low density, and is suitable for advanced weapons and equipment and high-speed impact protection and other fields.

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Abstract

The invention discloses a high-speed shearing resistant and low-density multi-principal-element intermetallic compound and a preparation method thereof. The multi-principal-element intermetallic compound is composed of a B2 phase, the alloy comprises Ti, Al, Nb and V, according to the atomic percent being 100%, the alloy comprises 40%-60% of Ti, 10%-20% of Al, 10%-20% of Nb and 10%-20% of V, and the atomic percent of Al, the atomic percent of Nb and the atomic percent of V are equal. The multi-principal-element intermetallic compound provided by the invention is a multi-principal-element alloy taking a high-temperature B2 phase as a main component, has relatively low density, relatively high strength and high-speed shearing resistance, and is expected to have important applications (such as body armor, armored car, artillery, supersonic aircraft and the like) in the fields of advanced weaponry, high-speed impact protection and the like.
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