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 2,3; Zhang, Aijun 2; Jia, Jiangang 1; Zhang, Junyan 2; Meng, Junhu 2
刊名	Materials Science and Engineering A
	2021-02-15
卷号	804
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
ISSN号	09215093
DOI	10.1016/j.msea.2020.140520
英文摘要	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.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000616000900003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147157]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 2.Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou; 730000, China; 3.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, 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).