Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure

doi:10.1557/s43577-021-00055-x

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	Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure
	Schuh, Christopher A.1; Lu, Ke 2
刊名	MRS BULLETIN
	2021-03-08
页码	11
ISSN号	0883-7694
DOI	10.1557/s43577-021-00055-x
通讯作者	Schuh, Christopher A.(schuh@mit.edu)
英文摘要	Nanocrystalline metals are transitioning from laboratory curiosities to engineering materials, in large part due to advances in improving their stability, making their exceptional properties more predictable and accessible. Nanoscale grains typically have a very strong innate tendency to coarsen, but the grain-boundary structure can be designed and tuned to lower its excess energy, reducing both the driving force for coarsening and the grain-boundary mobility. This article reviews two major strategies for achieving low-energy grain boundaries in nanocrystalline structures. First, grain-boundary alloying is discussed, including grain-boundary segregation and its energetic competition with the formation of second phases; with sufficient grain-boundary segregation tendency it is possible to stabilize nanostructures to high temperatures. Second, methods of achieving low-energy crystallographic grain-boundary structures are discussed, including the formation of nanotwinned structures and relaxing grain boundaries into low-energy structures through their interactions with partial dislocations. Both of these strategies have led to effective and implementable stable nanocrystalline materials, and point to many directions for future advancements.
资助项目	Ministry of Science and Technology of China[2017YFA0204401] ; Chinese Academy of Sciences ; US Department of Energy, Office of Basic Energy Sciences[DE-SC0020180]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000626480100001
资助机构	Ministry of Science and Technology of China ; Chinese Academy of Sciences ; US Department of Energy, Office of Basic Energy Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161710]
专题	金属研究所_中国科学院金属研究所
通讯作者	Schuh, Christopher A.
作者单位	1.MIT, Dept Mat Sci & Engn, Boston, MA 02138 USA 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Schuh, Christopher A.,Lu, Ke. Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure[J]. MRS BULLETIN,2021:11.
APA	Schuh, Christopher A.,&Lu, Ke.(2021).Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure.MRS BULLETIN,11.
MLA	Schuh, Christopher A.,et al."Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure".MRS BULLETIN (2021):11.