Structure Formation in Equimolar Mixture of HfC-ZrC-TiC-NbC Carbides

被引：5

作者：

Wang, D. ^{[1
]}

Mirovoy, Yu A. ^{[1
]}

Burlachenko, A. G. ^{[1
]}

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

Dedova, E. S. ^{[1
]}

Buyakova, S. P. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Strength Phys & Mat Sci, Siberian Branch, Tomsk, Russia

来源：

RUSSIAN PHYSICS JOURNAL | 2021年 / 64卷 / 07期

关键词：

transition metal carbides; solid solution; entropy stabilization; structure formation; hot pressing; ENTROPY; MULTICOMPONENT; STABILITY; SYSTEM;

D O I：

10.1007/s11182-021-02443-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Structure formation during hot pressing of an equimolar powder mixture HfC-ZrC-TiC-NbC in the temperature range from 1400 to 1900 degrees C is investigated. It is found that a monophase substitutional solid solution (Hf, Zr, Ti, Nb)C based on hafnium carbide forms at a temperature of 1700 degrees C. It is shown that the formation of the ceramic solid solution (Hf, Zr, Ti, Nb)C proceeded in many stages with the formation of intermediate two- and three-component ceramic solid solutions (Hf, Zr)C, (Nb, Zr)C, and (Hf, Zr, Ti)C and their subsequent dissolution. The resulting ceramic multicomponent substitutional solid solution (Hf, Zr, Ti, Nb)C has improved mechanical properties compared to similar properties of initial carbides: E = (616 +/- 77) GPa, H = (36 +/- 8) GPa, and K1C = ( 3.4 +/- 0.5) MPa center dot m(1/2).

引用

页码：1191 / 1197

页数：7

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