Possibility of obtaining refractory high-entropy AlTiZrVNb alloys from metal oxides

被引：6

作者：

Zhilina, E. M. ^{[1
]}

Russkih, A. S. ^{[1
]}

Osinkina, T. V. ^{[1
]}

Ignatieva, E. V. ^{[1
]}

Petrova, S. A. ^{[1
]}

Krasikov, S. A. ^{[1
]}

Dolmatov, A. V. ^{[1
]}

Rempel, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met, Ural Branch, 101 Ul Amundsena, Ekaterinburg 620016, Russia

来源：

RUSSIAN CHEMICAL BULLETIN | 2023年 / 72卷 / 04期

基金：

英国科研创新办公室;

关键词：

refractory high-entropy alloys; aluminothermic reduction; microhardness; phase formation; MECHANICAL-PROPERTIES; AL; MICROSTRUCTURE; CR; STRENGTH;

D O I：

10.1007/s11172-023-3852-7

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We consider a new method for the preparation of refractory high-entropy alloys (HEAs) AlTiZrVNb, which consists in the joint aluminothermic reduction of metals from their oxides. It was determined that V and Nb undergo reduction to a greater extent, and about 90% of their amounts transfer into the metal phase. Metals Ti and Zr undergo reduction to a lesser extent, with 76 and 50% of their amounts transitioning into the metal phase, respectively. The obtained alloy has a multiphase structure consisting of C14 Laves phases, Zr5Al3-type phases, and a B2-type ordered phase, which plays the role of a matrix. The microhardness of the alloy is 6.37 GPa, which is similar to the values of refractory HEAs. The structure of the obtained alloy has a similar structure throughout its bulk, namely, coarse-grained with a number of pores, partly filled with non-metallic inclusions of aluminum oxide.

引用

页码：895 / 901

页数：7

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