A kind of preparation method of high-entropy alloy binder phase tungsten-based high specific gravity alloy

Abstract

The invention discloses a preparing method of a high-entropy alloy binding phase tungsten base high gravity alloy. The method is characterized in that intermittent planetary ball milling is adopted for preparing amorphous-state high-entropy alloy binding phase powder with the Cu:Co:Cr:Fe:Ni being 0.5 to 1.5:1:1:1:1, the amorphous-state high-entropy alloy binding phase powder and hard phase powderare subjected to roller type ball milling mixing, and a prepared mixture is still in the amorphous-state; finally, the rapid temperature rise and short-time heat preservation vacuum high-frequency induction pressure sintering process is adopted to enable the amorphous-state high-entropy alloy binding phase in the high gravity alloy to be subjected to structural relaxation to finish crystallization, the process of converting the amorphous state to the crystalline state and the hysteresis element diffusion effect of the high-entropy alloy enable dissolution of the hard phase into the bonding phase to be restrained, the bonding phase is the single-phase face-centered cubic high-entropy alloy, and therefore the high-entropy alloy binding phase tungsten base high gravity alloy is prepared. Theproblem that at present, when the manner that the bonding phase and the hard phase are jointly mixed to be subject to conventional sintering is adopted for preparing the tungsten base high gravity alloy, W hard phase grains grow, and the relative content is reduced can be solved, and the method can be applied to preparing of the tungsten base high gravity alloy in the fields of aerospace, nationaldefense, military, mechanical engineering and the like.

Description

technical field [0001] The invention relates to a preparation method of a high specific gravity alloy, in particular to a preparation method of a high entropy alloy binder phase tungsten-based high specific gravity alloy, which belongs to the field of composite materials. Background technique [0002] Tungsten-based high specific gravity alloy is a composite material with W as the matrix and Ni, Fe, Co, Mn, Cu and other elements as the binder phase. High specific gravity alloy has small thermal expansion coefficient, good corrosion resistance and oxidation resistance, good electrical and thermal conductivity, high strength, good ductility, good impact toughness, and good ray absorption ability. It is widely used in national defense industry, aerospace and other fields. In order to meet the increasing performance requirements, people use various means to improve the performance of tungsten-based high specific gravity alloys. [0003] ZL201110269574.5 discloses a high-densit...

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Problems solved by technology

[0005] The present invention aims at the problem that the W hard phase grain grows and the relative content decreases when the tungsten-based high specific gravity alloy is prepared by mixing the binder phase and the hard phase together and then performing conventional sintering. High-entropy alloy binder phase powder, and finally a technical solution for vacuum high-frequency induction pressure sintering

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