Phase evolution and properties of (VNbTaMoW)C high entropy carbide prepared by reaction synthesis

被引：134

作者：

Liu, Diqiang ^{[1
,2
]}

Zhang, Aijun ^{[1
]}

Jia, Jiangang ^{[3
]}

Meng, Junhu ^{[1
]}

Su, Bo ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2020年 / 40卷 / 08期

关键词：

High entropy carbides; Reaction synthesis; Phase evolution; Microstructure; Thermal conductivity; THERMAL-CONDUCTIVITY; MICROSTRUCTURE;

D O I：

10.1016/j.jeurceramsoc.2020.03.020

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(VNbTaMoW)C high entropy carbide was fabricated by reaction synthesis using the constituent metal and graphite powders as raw materials. Phase formation and composition uniformity are analyzed using XRD, EDS and SEM. The phase composition for samples sintered at 1600 degrees C includes TaC, NbC, WC, MoC and VC according to XRD peak fitting and deconvolution. Samples sintered at 1850 degrees C form a single phase high entropy carbides, which exhibit high microhardness and relatively lower thermal conductivity of 9.2 W/m.K-1 at room temperature compared with binary carbides. Severe lattice distortion and high concentration of point defects are responsible for the low thermal conductivity of the high entropy (VNbTaMoW)C.

引用

页码：2746 / 2751

页数：6