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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(Differential scanning calorimetry,DSC)、差热分析(Differential thermal analysis,DTA)和X射线衍射分析(X-ray diffraction,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Na I(T1)单晶γ闪烁能谱仪测定了(Cu50Zr45Al5)99Sm1非晶合金对γ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Zr Cu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γ射线的线性吸收系数分别为0.49 cm-1和0.69 cm-1。其屏蔽性能介于Pb和Al之间,具有潜在的应用价值。
(Cu50Zr45Al5) 100-xSmx (x = 0,1,2,3,4) plate alloy samples were prepared by copper mold suction casting. The effect of Sm microalloying on the microstructure of Cu50Zr45Al5 amorphous alloy was studied by differential scanning calorimetry (DSC), differential thermal analysis (DTA) and X-ray diffraction (XRD) Effect of thermal stability. The linear absorption coefficient of (Cu50Zr45Al5) 99Sm1 amorphous alloy to γ-ray was measured by Na I (T1) single crystal γ-ray scintillation spectrometer. The results show that when the content of Sm is less than 3% (at%), the prepared plate-shaped alloy is a completely amorphous structure. When more than 3%, intermetallic compounds such as Cu10Zr7 and ZrCu are precipitated. The trace addition of Sm increases the thermal stability of the alloy. The linear absorption coefficients of γ-ray of 137Cs and 60Co prepared by (Cu50Zr45Al5) 99Sm1 amorphous alloy were 0.49 cm-1 and 0.69 cm-1, respectively. Its shielding performance lies between Pb and Al, which has potential application value.