Pt Schwarz crystals stabilized by minimal-surface grain boundaries and twins at the grain size limit
文献类型：期刊论文
| 作者 | Fu, H. L.1,2; Zhou, X.1; Gao, Z. P.1,2; Jin, Z. H.1; Li, X. Y.1; Lu, K.1,3 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 276页码:10 |
| 关键词 | Schwarz crystal Platinum Polycrystal Grain boundaries Mechanical twinning Structural stability Hall-petch relationship Molecular dynamics |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2024.120007 |
| 通讯作者 | Jin, Z. H.(zhjin@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn) |
| 英文摘要 | Schwarz crystals with uniformly distributed twins enclosed by general grain boundaries (GBs) resembling triply minimal-surfaces were observed in high stacking fault energy metal Pt which is believed not readily to twin. By refining the grains of pure Pt from 140 mu m to several nanometers via plastic deformation technique, deformation twins were found to emerge numerously and the structural morphologies of Schwarz crystals can be identified at grain sizes below 4 nm. Both experiments and atomistic simulations suggest that Pt Schwarz crystals are thermally stable at temperatures approaching the thermal equilibrium melting point. The measured room temperature microhardness as a function of grain size, on the other hand, may increase monotonically up to 12.9 GPa, revealing a sustained Hall-Petch relationship. The observed outstanding mechanical stabilities can be attributed to that, regardless of the critical twin size and the stacking fault energy of the material, the plastic deformation at the grain size limit is solely limited by twinning and both the nucleation and bowing-out of twinning partial dislocations from GB sources are notoriously difficult according to simulations and theory. |
| 资助项目 | National Natural Science Foundation of China[52225102] ; Chinese Academy of Sciences[XDB0510000] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001259103300001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; Chinese Academy of Sciences |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Jin, Z. H.; Li, X. Y. |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Liaoning Acad Mat, 280 Chuangxin Rd, Shenyang 110167, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, H. L.,Zhou, X.,Gao, Z. P.,et al. Pt Schwarz crystals stabilized by minimal-surface grain boundaries and twins at the grain size limit[J]. ACTA MATERIALIA,2024,276:10. |
| APA | Fu, H. L.,Zhou, X.,Gao, Z. P.,Jin, Z. H.,Li, X. Y.,&Lu, K..(2024).Pt Schwarz crystals stabilized by minimal-surface grain boundaries and twins at the grain size limit.ACTA MATERIALIA,276,10. |
| MLA | Fu, H. L.,et al."Pt Schwarz crystals stabilized by minimal-surface grain boundaries and twins at the grain size limit".ACTA MATERIALIA 276(2024):10. |
入库方式： OAI收割
来源：金属研究所
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