Excellent high-temperature strength and ductility of the ZrC nanoparticles dispersed molybdenum

doi:10.1016/j.actamat.2022.117725

	Excellent high-temperature strength and ductility of the ZrC nanoparticles dispersed molybdenum
	Jing, K.1,2; Liu, R.2; Xie, Z. M.2; Ke, J. G.1,2; Wang, X. P.2; Fang, Q. F.2; Liu, C. S.2; Wang, H.3; Li, G.3; Wu, X. B.2
刊名	ACTA MATERIALIA
	2022-04-01
卷号	227
关键词	Nanostructure Mechanical properties Strengthening Interface Zirconium carbide
ISSN号	1359-6454
DOI	10.1016/j.actamat.2022.117725
通讯作者	Liu, R.(liurui@issp.ac.cn) ; Wu, X. B.(xbwu@issp.ac.cn)
英文摘要	The interface control is critical in the development of high-performance molybdenum (Mo) alloys for high-temperature applications like space reactors. In this work, nanostructured Mo-ZrC alloy with excellent mechanical properties at both room temperature and high temperatures was fabricated by nanoscale ZrC dispersion and interface control. The average grain size of Mo-ZrC alloy is only 0.67 mu m owing to the homogeneous dispersion of nanoscale ZrC particles. At room temperature, the ultimate tensile strength (UTS) and total elongation (TE) of the Mo-ZrC alloy are 928 MPa and 34.4%, respectively. At 1000 & nbsp;C, the UTS is still as high as 562 MPa, which is significantly higher than those reported in oxide dispersion-strengthened Mo alloys, while the TE remains a high value of 23.5%. Additionally, the recrystallization start temperature of Mo-ZrC alloy is about 1400 & nbsp;& nbsp;C, indicating remarkable thermal stability. First-principles calculations revealed that the interstitial oxygen reduces grain boundary cohesion, while C and ZrC could increase the fracture strength of the boundaries owing to the strong Mo-C bonds. The excellent mechanical properties and thermal stability of the Mo-ZrC alloy can be attributed to a synergistic effect of nanoscale ZrC particles dispersion strengthening, fine-grain strengthening, and grain boundary purification. The strategy could be applied to design other refractory alloys with both high strength and ductility for high-temperature applications.(C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2019YFE03120001] ; National Key Research and Development Program of China[2017YFE0302400] ; National Key Research and Development Program of China[2017YFA0402800] ; National Natural Science Foundation of China[51671184] ; National Natural Science Foundation of China[51971213] ; National Natural Science Foundation of China[52173303] ; National Natural Science Foundation of China[52171084] ; Foundation of Science and Technology on Reactor Fuel and Materials Laboratory[STRFML-2018-22] ; HFIPS Director's Fund, Chinese Academy of Sciences[YZJJ202102] ; HFIPS Director's Fund, Chinese Academy of Sciences[YZJJZX202012]
WOS关键词	PLASMA-FACING COMPONENTS ; MECHANICAL-PROPERTIES ; ODS MOLYBDENUM ; ENVIRONMENTAL EMBRITTLEMENT ; STRUCTURAL-MATERIALS ; THERMAL-STABILITY ; GRAIN-BOUNDARIES ; ALLOYS ; MICROSTRUCTURE ; FRACTURE
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000789652100004
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Foundation of Science and Technology on Reactor Fuel and Materials Laboratory ; HFIPS Director's Fund, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130835]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, R.; Wu, X. B.
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 3.Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Jing, K.,Liu, R.,Xie, Z. M.,et al. Excellent high-temperature strength and ductility of the ZrC nanoparticles dispersed molybdenum[J]. ACTA MATERIALIA,2022,227.
APA	Jing, K..,Liu, R..,Xie, Z. M..,Ke, J. G..,Wang, X. P..,...&Wu, X. B..(2022).Excellent high-temperature strength and ductility of the ZrC nanoparticles dispersed molybdenum.ACTA MATERIALIA,227.
MLA	Jing, K.,et al."Excellent high-temperature strength and ductility of the ZrC nanoparticles dispersed molybdenum".ACTA MATERIALIA 227(2022).