Effect of microgravity on the solidification of aluminum-bismuth-tin immiscible alloys
文献类型：期刊论文
| 作者 | Jiang, Hongxiang1; Li, Shixin1,2; Zhang, Lili1; He, Jie1; Zhao, Jiuzhou1 |
| 刊名 | NPJ MICROGRAVITY
 |
| 出版日期 | 2019-11-18 |
| 卷号 | 5页码:9 |
| DOI | 10.1038/s41526-019-0086-z |
| 通讯作者 | Jiang, Hongxiang(hxjiang@imr.ac.cn) ; Zhao, Jiuzhou(jzzhao@imr.ac.cn) |
| 英文摘要 | Directional solidification experiment was carried out with Al-Bi-Sn immiscible alloy under microgravity environment onboard the Tiangong 2 space laboratory of China. Sample with a well-dispersed microstructure was obtained by properly designing the experimental scheme, the matrix shows equiaxed morphology, and there is no visible gas cavity or pinhole in the sample. In contrast, the reference samples solidified on earth show phase-segregated structure and contain some gas cavities or pinholes. The grain morphology of the terrestrial sample depends on the solidification direction, it is equiaxed when the sample ampoule was withdrawn against the gravity direction, while it is columnar when the sample ampoule was withdrawn along the gravity direction. The solidification process and affecting mechanisms of microgravity on the microstructure formation are discussed. The results indicate that the microgravity conditions can effectively diminish the convective flow of the melt and the Stokes motions of the minority phase droplets and gas bubbles, which are helpful for suppressing the occurrence of macro-segregation and preventing the formation of porosity. The results also demonstrate that the microgravity conditions favor the detachment between the melt and the wall of crucible, thus increasing the nucleation undercooling of alpha-Al nuclei and promoting the formation of equiaxed grain. |
| 资助项目 | China's Manned Space Station Project[TGJZ800-2-RW024] ; Chinese Academy of Sciences Strategic Priority Program on Space Science[XDA15013800] ; National Natural Science Foundation of China[51771210] ; National Natural Science Foundation of China[51574216] ; National Natural Science Foundation of China[51774264] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000496834200001 |
| 资助机构 | China's Manned Space Station Project ; Chinese Academy of Sciences Strategic Priority Program on Space Science ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/136931]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Jiang, Hongxiang; Zhao, Jiuzhou |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Hongxiang,Li, Shixin,Zhang, Lili,et al. Effect of microgravity on the solidification of aluminum-bismuth-tin immiscible alloys[J]. NPJ MICROGRAVITY,2019,5:9. |
| APA | Jiang, Hongxiang,Li, Shixin,Zhang, Lili,He, Jie,&Zhao, Jiuzhou.(2019).Effect of microgravity on the solidification of aluminum-bismuth-tin immiscible alloys.NPJ MICROGRAVITY,5,9. |
| MLA | Jiang, Hongxiang,et al."Effect of microgravity on the solidification of aluminum-bismuth-tin immiscible alloys".NPJ MICROGRAVITY 5(2019):9. |
入库方式： OAI收割
来源：金属研究所
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