| Al_2O_3颗粒对Al-Zn合金激光快凝组织的影响 |
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| 引用本文： | 张坤,纪全,陈光南.Al_2O_3颗粒对Al-Zn合金激光快凝组织的影响[J].应用激光,1999(5). |
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| 作者姓名： | 张坤 纪全 陈光南 |
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| 作者单位： | 中国科学院力学研究所材料中心!北京 100080 |
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| 基金项目： | 国家自然科学基金重点项目资助!（No59836220） |
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| 摘 要： | 通过比较Ａｌ－Ｚｎ合金和Ａｌ_２Ｏ_（３ｐ）／Ａｌ－Ｚｎ复合材料的激光重熔组织。分析Ａｌ_２Ｏ_３颗粒对Ａｌ－Ｚｎ合金激光快凝组织的影响规律。实验结果表明，Ａｌ_２Ｏ_３颗粒可以显著细化激光熔区的晶粒。基于凝固界面与颗粒交互作用的理论分析，给出了晶粒细化的临界条件。
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| 关 键 词： | 激光快凝 颗粒复合材料 晶粒细化 |
Effect of Al_2O_3 Particles on Microstructure of AL-Zn Alloy During Laser Rapid Solidification |
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| Zhang Kun,Ji Quan,Chen Guangnan.Effect of Al_2O_3 Particles on Microstructure of AL-Zn Alloy During Laser Rapid Solidification[J].Applied Laser,1999(5). |
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| Authors: | Zhang Kun Ji Quan Chen Guangnan |
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| Abstract: | in order to understand the effect of particles on solidfication behavior of matrix alloy during laser processing,resolidified microstructures of Al-Zn alloy and Al_2O_3/Al-Zn composite have been comparatively investigated. Refined grain structure exhibits in laser remelted composite compared to coarse epitaxial grain structure in laser remelted alloy. The condition of grain refinement is rationalized based on the interaction between the particle and the solidification interface. |
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| Keywords: | laser rapid solidification particle composite grain refinement |
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