不同温度下Al-Si共晶合金与Zr-2合金的相容性研究  

Compatibility of Al-Si Eutectic Alloy and Zr-2 at Different Heat-Treatment Temperature

作　　者：刘锦云[1] 邹从沛[2] 查五生[1] 兰军[1] 燕顺[1] 颜燕[1] 

机构地区：[1]西华大学材料科学与工程学院,成都610039 [2]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2009年第2期51-54,共4页Nuclear Power Engineering

摘　　要：用粉末冶金工艺制备了Al-Si共晶合金与Zr-2合金扩散偶,研究了不同等温热处理温度和时间条件下扩散偶的相容性。采用扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)技术分析了扩散偶界面处的微观形貌和元素分布,讨论了扩散层形成机理。结果表明,环境温度及材料状态显著影响扩散偶之间的相容性。650℃时,液态Al-Si合金对Zr-2合金的浸润和扩散形成了较明显的以Zr3A1化合物为主的扩散层;560℃时,扩散元素之间仅产生固态扩散,形成的扩散层很薄;350℃时,扩散系数更小,几乎未发生扩散和形成扩散层,Al-Si共晶合金与Zr-2合金之间具有良好的相容性。To investigate the compatibility of Al-Si eutectic alloy and Zr-2 at different heat-treatment temperature for different time, the couple of them was prepared by powder-metallurgy method. The micro- structure and element distribution have been measured with SEM, EDS, and XRD. It is＇shown that the heat-treatment temperature and the state of Al-Si alloy greatly influence the compatibility. At 650℃× 40h, the dramatic diffusion layer has been formed due to the infiltration and diffusion of liquid Al-Si alloy. At 560℃ ×240h, the diffusion layer is very thin because there exists a solid state diffusion only. At 350℃×240h, due to a much smaller diffusion coefficient, almost no diffusion layer occurs, which means a good compatibility between Al-Si eutectic alloy and Zr-2 at this temperature.

关 键 词：中子吸收材料 铝硅共晶合金 锆合金 相容性 扩散 

分 类 号：TG164.2[金属学及工艺—热处理]