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Thermally stable coherent domain boundaries in complex-structured Cr2Nb intermetallics
Zhang, Wei; Du, Kui; Chen, Xingqiu; Sheng, Liyuan; Ye, Hengqiang; kuidu@imr.ac.cn
2016
Source PublicationPHILOSOPHICAL MAGAZINE
ISSN1478-6435
Volume96Issue:1Pages:58-70
AbstractThe strength and hardness of nanostructured materials are significantly enhanced owing to the large amount of grain boundaries (GB) produced by a reduced grain size. The thermal stability of the GB is a key to maintaining the grain size and thus the strength/hardness in nanostructured materials at high temperatures. In this work, coherent domain boundaries (DB) were introduced by compressive processing to sub-divide a complex-structured intermetallic Cr2Nb into nanograins of size down to 2nm. These DB persisted after an annealing of 10h at 1273K. The coherent DB have been investigated by aberration-corrected high-resolution transmission electron microscopy and first-principles calculations. The high thermal stability is evidently a result of low formation energies of the DB.
description.department[zhang, wei ; du, kui ; chen, xingqiu ; ye, hengqiang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [zhang, wei ; du, kui] tsinghua univ, beijing natl ctr electron microscopy, beijing 100084, peoples r china ; [sheng, liyuan] peking univ, shenzhen inst, shenzhen key lab human tissue regenerat & repair, shenzhen, peoples r china ; [zhang, wei] brookhaven natl lab, upton, ny 11973 usa
KeywordNanostructured Materials Thermal Stability Domain Structure Atomic-resolution Electron Microscopy High-temperature Materials Cr2nb
Funding OrganizationNatural Sciences Foundation of China [51221264, 51371177, 51390473]; Special Funds for the Major State Basic Research Projects of China [2012CB619503]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75215
Collection中国科学院金属研究所
Corresponding Authorkuidu@imr.ac.cn
Recommended Citation
GB/T 7714
Zhang, Wei,Du, Kui,Chen, Xingqiu,et al. Thermally stable coherent domain boundaries in complex-structured Cr2Nb intermetallics[J]. PHILOSOPHICAL MAGAZINE,2016,96(1):58-70.
APA Zhang, Wei,Du, Kui,Chen, Xingqiu,Sheng, Liyuan,Ye, Hengqiang,&kuidu@imr.ac.cn.(2016).Thermally stable coherent domain boundaries in complex-structured Cr2Nb intermetallics.PHILOSOPHICAL MAGAZINE,96(1),58-70.
MLA Zhang, Wei,et al."Thermally stable coherent domain boundaries in complex-structured Cr2Nb intermetallics".PHILOSOPHICAL MAGAZINE 96.1(2016):58-70.
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