A high-strength rhenium alloy material and a method for manufacturing the same

By adding modified tantalum carbide and high-entropy rare earth elements to rhenium alloys, the problems of insufficient high-temperature performance and mechanical properties of rhenium alloys were solved, and high-strength rhenium alloy materials were prepared, which are suitable for extreme working conditions such as aerospace.

CN121555877BActive Publication Date: 2026-04-21HUNAN YUANJI NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202610076380.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-21
Publication Date
2026-04-21
Estimated Expiration
2046-01-21

AI Technical Summary

Technical Problem

Existing rhenium alloy materials are difficult to meet the requirements of extreme working conditions such as aerospace in terms of high-temperature performance and mechanical properties, and there are problems in the preparation process such as scarcity of rhenium resources, difficulty in controlling the uniformity of powder mixing, and coarse grains.

Method used

High-strength rhenium alloy materials are prepared by adding modified tantalum carbide and high-entropy rare earth elements as reinforcing and binding phases to rhenium alloys, and by ball milling, molding, pre-sintering and high-temperature sintering. Modified tantalum carbide improves high-temperature strength, and high-entropy rare earth elements improve strength and hardness.

Benefits of technology

It significantly improves the high-temperature strength, hardness, and bending strength of rhenium alloys, enhances sintering quality and overall mechanical properties, and makes them suitable for applications in high-temperature environments.

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Abstract

This invention belongs to the technical field of rhenium alloy materials, specifically relating to a high-strength rhenium alloy material and its preparation method. The rhenium alloy material is composed of the following raw materials in the indicated mass percentages: molybdenum 12-24 wt%, niobium 6-9 wt%, cobalt 2-5 wt%, tungsten 1-3 wt%, modified tantalum carbide 0.5-1.2 wt%, high-entropy rare earth elements 3-6 wt%, with the balance being rhenium and other unavoidable impurities. The modified tantalum carbide is prepared by the following process: tantalum chloride, zirconium oxychloride, and phenolic resin are added to a mixed solution of acetylacetone and n-butanol, stirred for 1-2 h under heating conditions, ammonia is added dropwise, and stirring continues for 0.5-1 h. After drying, a precursor is obtained; the precursor is calcined and cooled to obtain modified tantalum carbide. The rhenium alloy prepared by this invention exhibits high hardness, good bending strength, and excellent high-temperature mechanical properties.
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