Fabrication of ultra-fine grained Hf-based materials with superior hardness and temperature-independent electrical conductivity by a combination of high-energy ball milling and spark plasma sintering

doi:10.1016/j.jallcom.2022.166719

	Fabrication of ultra-fine grained Hf-based materials with superior hardness and temperature-independent electrical conductivity by a combination of high-energy ball milling and spark plasma sintering
	Hao, Liyu 2; Fan, Yong 2; Shen, Shangkun 2; Liu, Xing 2; Wu, Zefeng 2; Xie, Zhuoming 3; Liu, Peng 1,4; Fu, Engang 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2022-12-05
卷号	925
关键词	UFG Hf SPS Superior hardness Temperature -independent electrical conductivity
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2022.166719
通讯作者	Liu, Peng(pengliu@sdu.edu.cn) ; Fu, Engang(efu@pku.edu.cn)
英文摘要	Ultra-fine grained (UFG) hexagonal-close-packed (HCP) hafnium (Hf) and Hf-5 wt%Y2O3 (HYO) were pre-pared by a combination of high-energy ball milling and spark plasma sintering (SPS), and both possess high relative density (95-99%), high hardness, and low electrical conductivity. The HYO sample shows superior hardness of 12.11 GPa, which is about 6-7 times of that of coarse-grained Hf, and electrical conductivity of 2 x 10(5 )S/m, which keeps constant and is almost independent of temperature. It is very possible for HYO with these good properties to become an excellent plasma torch cathode. The analysis of the microstructure under transmission electron microscope (TEM) and scanning electron microscope (SEM) shows that the superior hardness of the samples originates from the grain boundary (GB) strengthening and the pinning effects of the Y2O3 particles, while their almost temperature-independent electrical conductivity originates from the combining effects of the dispersion of large electrical resistivity particles Y2O3 and the dense high -angle grain boundaries (GBs). (C) 2022 Elsevier B.V. All rights reserved.
资助项目	National Magnetic Confinement Fusion Energy Research Project from the Ministry of Science and Technology of China[2022YFE03030000] ; National Magnetic Confinement Fusion Energy Research Project from the Ministry of Science and Technology of China[2019YFE03120003] ; National Magnetic Confinement Fusion Energy Research Project from the Ministry of Science and Technology of China[2018YFE0307100] ; National Natural Science Foundation of China[11921006] ; National Natural Science Foundation of China[11975034] ; National Natural Science Foundation of China[11375018] ; National Natural Science Foundation of China[U20B2025] ; National Natural Science Foundation of China[U21B2082] ; Beijing Municipal Natural Science Foundation[1222023] ; Science Fund for Creative Research Groups of NSFC ; Peking University ; Collaborative Innovation Center of Quantum Matter at Peking University
WOS关键词	MECHANICAL-PROPERTIES ; MICROSTRUCTURE ; TRANSFORMATION ; TRANSITION
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000848433000003
资助机构	National Magnetic Confinement Fusion Energy Research Project from the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; Science Fund for Creative Research Groups of NSFC ; Peking University ; Collaborative Innovation Center of Quantum Matter at Peking University
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131820]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Peng; Fu, Engang
作者单位	1.Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China 2.Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Dept Techn Phys, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China 4.Shandong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Hao, Liyu,Fan, Yong,Shen, Shangkun,et al. Fabrication of ultra-fine grained Hf-based materials with superior hardness and temperature-independent electrical conductivity by a combination of high-energy ball milling and spark plasma sintering[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,925.
APA	Hao, Liyu.,Fan, Yong.,Shen, Shangkun.,Liu, Xing.,Wu, Zefeng.,...&Fu, Engang.(2022).Fabrication of ultra-fine grained Hf-based materials with superior hardness and temperature-independent electrical conductivity by a combination of high-energy ball milling and spark plasma sintering.JOURNAL OF ALLOYS AND COMPOUNDS,925.
MLA	Hao, Liyu,et al."Fabrication of ultra-fine grained Hf-based materials with superior hardness and temperature-independent electrical conductivity by a combination of high-energy ball milling and spark plasma sintering".JOURNAL OF ALLOYS AND COMPOUNDS 925(2022).