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核技术  2015 

Cu-Zr-Al-Sm非晶合金的r射线屏蔽性能研究

DOI: 10.11889/j.0253-3219.2015.hjs.38.010205, PP. 10205-10205

Keywords: 非晶态合金,铜模吸铸法,r射线,屏蔽性能

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Abstract:

采用铜模吸铸法制备了(Cu50Zr45Al5)100?xSmx(x?0,1,2,3,4)板状合金试样。用差热扫描量热分析(Differentialscanningcalorimetry,DSC)、差热分析(Differentialthermalanalysis,DTA)和X射线衍射分析(X-raydiffraction,XRD)研究了Sm微合金化对Cu50Zr45Al5非晶合金结构与热稳定性的影响。采用NaI(T1)单晶?闪烁能谱仪测定了(Cu50Zr45Al5)99Sm1非晶合金对?射线的线性吸收系数。结果表明,当Sm含量低于3%(at%)时制备的板状合金为完全的非晶结构,超过3%会有Cu10Zr7和ZrCu等金属间化合物析出。Sm的微量添加增加了合金的热稳定性。制备的(Cu50Zr45Al5)99Sm1非晶合金对137Cs和60Co两种?射线的线性吸收系数分别为0.49cm?1和0.69cm?1。其屏蔽性能介于Pb和Al之间,具有潜在的应用价值。

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