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Stability of nanocrystalline metals: The role of grain-boundary chemistry and structure
Schuh, Christopher A.1; Lu, Ke2
Corresponding AuthorSchuh, Christopher A.(schuh@mit.edu)
2021-03-08
Source PublicationMRS BULLETIN
ISSN0883-7694
Pages11
AbstractNanocrystalline 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.
Funding OrganizationMinistry of Science and Technology of China ; Chinese Academy of Sciences ; US Department of Energy, Office of Basic Energy Sciences
DOI10.1557/s43577-021-00055-x
Indexed BySCI
Language英语
Funding ProjectMinistry of Science and Technology of China[2017YFA0204401] ; Chinese Academy of Sciences ; US Department of Energy, Office of Basic Energy Sciences[DE-SC0020180]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000626480100001
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161711
Collection中国科学院金属研究所
Corresponding AuthorSchuh, Christopher A.
Affiliation1.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
Recommended Citation
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.
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