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

doi:10.1016/j.msea.2020.140520

	Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C
	Liu, Diqiang 1,2; Zhang, Aijun 1; Jia, Jiangang3 ; Zhang, Junyan 1; Meng, Junhu 1
	2021-02-15
发表期刊	Materials Science and Engineering A
ISSN	09215093
卷号	804
摘要	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. © 2020 Elsevier B.V.
关键词	Carbides Crystal structure Entropy Molybdenum compounds Niobium compounds Powder metals Solid solutions Tantalum compounds Thermal conductivity Average grain size Compositional uniformity High flexural strength Low thermal conductivity Partial solid solutions Randomly distributed Reaction synthesis Temperature range
DOI	10.1016/j.msea.2020.140520
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000616000900003
出版者	Elsevier Ltd
EI入藏号	20204709509486
EI主题词	Tungsten compounds
EI分类号	641.1 Thermodynamics - 804.2 Inorganic Compounds - 933 Solid State Physics - 933.1.1 Crystal Lattice
来源库	Compendex
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/147157
专题	材料科学与工程学院
通讯作者	Meng, Junhu
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Sci & Technol Wear & Protect Mat, 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
推荐引用方式 GB/T 7714	Liu, Diqiang,Zhang, Aijun,Jia, Jiangang,et al. Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C[J]. Materials Science and Engineering A,2021,804.
APA	Liu, Diqiang,Zhang, Aijun,Jia, Jiangang,Zhang, Junyan,&Meng, Junhu.(2021).Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C.Materials Science and Engineering A,804.
MLA	Liu, Diqiang,et al."Reaction synthesis and characterization of a new class high entropy carbide (NbTaMoW)C".Materials Science and Engineering A 804(2021).