AlCuMgZn单晶合金的空间凝固
Solidification of AlCuMgZn Single Crystal in Space
查看参考文献26篇
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文摘
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重力对合金凝固过程与缺陷形成具有重要影响.在常规地面条件下难以清晰揭示凝固过程中的重力效应及其作用规律,而在微重力环境中重力对熔体的作用以及对凝固过程的影响大大降低.利用天宫二号空间实验并结合地面对比实验,研究AlCuMgZn单晶合金在微重力和重力环境下枝晶生长形貌和特征参数差异以及成分偏析和缺陷形成的异同,揭示重力对枝晶生长过程和成分偏析等现象的影响及其在凝固缺陷形成中的作用. |
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其他语种文摘
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Gravity plays an important role in alloy solidification process and defect formation. However, it is difficult to reveal the effects of gravity and study the mechanisms through traditional ground-based solidification experiments. Under microgravity conditions, the effects of gravity on molten melt and solidification process will be significantly diminished. Therefore, in order to explore the role of gravity in dendrite growth process and solute segregation as well as solidification defect formation, by using the microgravity environment in space, and combining with ground-based comparison experiments, the dendritic morphologies, characteristics sizes as well as solute segregation and defect formation under normal gravity and microgravity of AlCuMgZn single crystal alloy are planning to be comparatively investigated during Tiangong-2 mission. In this paper, the progress of the project, such as the research contents, sample and ampoule design, space experimental scheme and main ground-based tests and results are introduced. |
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来源
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空间科学学报
,2016,36(4):445-449 【核心库】
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DOI
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10.11728/cjss2016.04.445
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关键词
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Al合金
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单晶合金
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空间微重力
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定向凝固
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地址
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中国科学院金属研究所, 中国科学院核用材料与安全评价重点实验室, 沈阳, 110016
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语种
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中文 |
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ISSN
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0254-6124 |
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学科
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航天(宇宙航行) |
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基金
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中国载人空间站工程项目资助
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文献收藏号
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CSCD:5752232
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