| Al-Pb合金粉末壳型组织形成过程 |
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| 引用本文： | 李海丽,赵九洲,何杰.Al-Pb合金粉末壳型组织形成过程[J].金属学报,2007,43(6):659-662. |
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| 作者姓名： | 李海丽 赵九洲 何杰 |
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| 作者单位： | 中国科学院金属研究所,沈阳,110016;中国科学院金属研究所,沈阳,110016;中国科学院金属研究所,沈阳,110016 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金
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辽宁省资助项目 |
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| 摘 要： | 对Al-Pb合金开展了高压气体雾化快速凝固实验,金相观察表明粉末表面具有一Pb富集层.建立了描述雾化液滴凝固组织演变的数学模型,模拟分析了液滴凝固过程,结果表明,富Pb表层的形成是因为在液-液相变过程中富Pb液相在雾化液滴表面发生异质形核导致的.
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| 关 键 词： | Al-Pb合金 雾化 凝固 模拟 |
| 文章编号： | 0412-1961（2007）06-0659-04 |
| 收稿时间： | 2006-10-30 |
| 修稿时间： | 2006-10-302007-02-01 |
Formation of theShell-type Structure in a Powder of Al-Pb Alloy |
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| LI Haili,ZHAO Jiuzhou,HE Jie.Formation of theShell-type Structure in a Powder of Al-Pb Alloy[J].Acta Metallurgica Sinica,2007,43(6):659-662. |
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| Authors: | LI Haili ZHAO Jiuzhou HE Jie |
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| Affiliation: | Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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| Abstract: | High pressure gas atomization experiments were done with Al-Pb immiscible alloy. A Pb-rich shell on the alloy powder surface as observed by metaUography. A model describing the microstructure evolution in Al-Pb atomized droplet was developed. The solidification process was calculated. The results indicate that the formation of the shell-type structure is due to the heterogeneous nucleation of the Pb-rich phase on the atomized drop surface. |
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| Keywords: | Al-Pb alloy atomization solidification modeling |
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