Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C

doi:https://doi.org/10.1016/j.msea.2020.140520

LICP OpenIR > 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心

	Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C
Department	中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
	Liu DQ(刘第强)1,2; Zhang AJ(张爱军)1 ; Jia JG(贾建刚)3; Zhang JY(张俊彦)1,2 ; Meng JH(孟军虎)1,2
The second department	金属陶瓷耐磨材料与先进制造课题组
	2021
Source Publication	Materials Science & Engineering A
Volume	804 Issue:2021 Pages:140520
Abstract	A new class of high entropy carbide (NbTaMoW)C was fabricated by reaction synthesis at temperatures as low as 1800 ◦C using metal powders and graphite as raw materials. Phase formation, compositional uniformity, and microstructure of the (NbTaMoW)C were investigated. The experimental results showed that partial solid solution phase was formed when sample sintered at 1600 ◦C, according to XRD peak fitting and deconvolution. The as-prepared (NbTaMoW)C with relative density of 97.3% possessed a single-phase rock-salt crystal structure, in which the four metal elements are randomly distributed on the cation sublattice while C occupies the anion sublattice. It was further revealed that (NbTaMoW)C had a high compositional uniformity and the average grain size is 9 ± 0.5 μm. By taking the advantage of these characteristics, the microhardness of (NbTaMoW)C was significantly improved as compared with the base monocarbides. The increase in hardness was attributed to the solid solution strength mechanism. Meanwhile, (NbTaMoW)C exhibited high flexural strength and a relatively low thermal conductivity of 3.19 ± 0.04 mm2/s at room temperature. With temperature increasing, the thermal conductivity of (NbTaMoW)C increases over the entire temperature range from 25 to 1000 ◦C.
Keyword	High entropy carbides Reaction synthesis Microstructure Mechanical properties Thermal properties
MOST Discipline Catalogue	工学::材料科学与工程（可授工学、理学学位）
DOI	https://doi.org/10.1016/j.msea.2020.140520
Indexed By	SCI
If	5.234
Language	英语
compositor	第一作者单位
Citation statistics	Cited Times:32[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.licp.cn/handle/362003/27900
Collection	中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心
Corresponding Author	Meng JH(孟军虎)
Affiliation	1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics 2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences 3.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology
Recommended Citation GB/T 7714	Liu DQ,Zhang AJ,Jia JG,et al. Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C[J]. Materials Science & Engineering A,2021,804(2021):140520.
APA	Liu DQ,Zhang AJ,Jia JG,Zhang JY,&Meng JH.(2021).Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C.Materials Science & Engineering A,804(2021),140520.
MLA	Liu DQ,et al."Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C".Materials Science & Engineering A 804.2021(2021):140520.

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