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DOI | 10.1126/science.aar6941 |
Enhanced thermal stability of nanograined metals below a critical grain size | |
Zhou, X.1,2; Li, X. Y.1; Lu, K.1 | |
2018-05-04 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 360期号:6388页码:526-529 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The limitation of nanograined materials is their strong tendency to coarsen at elevated temperatures. As grain size decreases into the nanoscale, grain coarsening occurs at much lower temperatures, as low as ambient temperatures for some metals. We discovered that nanometer-sized grains in pure copper and nickel produced from plastic deformation at low temperatures exhibit notable thermal stability below a critical grain size. The instability temperature rises substantially at smaller grain sizes, and the nanograins remain stable even above the recrystallization temperatures of coarse grains. The inherent thermal stability of nanograins originates from an autonomous grain boundary evolution to low-energy states due to activation of partial dislocations in plastic deformation. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000431351500044 |
WOS关键词 | HIGH-PRESSURE TORSION ; HIGH-PURITY COPPER ; PURE COPPER ; NANOCRYSTALLINE MATERIALS ; BOUNDARY DISSOCIATION ; SOLUTE SEGREGATION ; TEMPERATURE ; EMISSION ; DEFORMATION ; EXTRUSION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/198568 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China; 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, X.,Li, X. Y.,Lu, K.. Enhanced thermal stability of nanograined metals below a critical grain size[J]. SCIENCE,2018,360(6388):526-529. |
APA | Zhou, X.,Li, X. Y.,&Lu, K..(2018).Enhanced thermal stability of nanograined metals below a critical grain size.SCIENCE,360(6388),526-529. |
MLA | Zhou, X.,et al."Enhanced thermal stability of nanograined metals below a critical grain size".SCIENCE 360.6388(2018):526-529. |
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