Cu-Zr-Al-Sm非晶合金的γ射线屏蔽性能研究  

γ-ray shielding properties of Cu-Zr-Al-Sm bulk metallic glasses

作　　者：钟鹏 刘超卓 王殿生 石志强[2] 王彦芳[2] 

机构地区：[1]中国石油大学(华东)理学院物理与光电工程系,青岛266580 [2]中国石油大学(华东)材料科学与工程系,青岛266580

出　　处：《核技术》2015年第1期29-33,共5页Nuclear Techniques

基　　金：863计划(No.2012AA09A203);中央高校基本科研业务费专项资金(No.11CX04032A)资助

摘　　要：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。Background： Amorphous alloy has special application prospects in nuclear reactors and electromagnetic fields because of its excellent shielding properties. Purpose： This paper attempts to study the effects of minor addition Sm on the microstructure, glass-forming ability and thermal stability of the Cu-based Cu50Zr45A15 bulk metallic glass （BMG） and the γ-ray shielding properties of the Cu-Zr-A1-Sm amorphous alloys. Methods： （CusoZr45A15）100-xSmx （x=0, 1, 2, 3 and 4） alloys plates are prepared by copper mold suction casting. The microstructure, thermal stability and the γ-ray shielding properties of the prepared samples are carried out by X-ray diffraction （XRD）, differential scanning calorimeters （DSC）, differential thermal analysis （DTA） and NaI（T1） scintillation gamma spectrometer. Results： The experimental results show that the Cu10Zr7 and ZrCu phases are precipitated when Sm addition exceeds 3%（at%）, otherwise the alloys are fully amorphous state. Minor addition Sm improved the thermal stability of the base alloy. The linear absorption coefficient of （CusoZr45A15）99Sm1 amorphous alloys against 137Cs and 60C0 γ-ray are 0.49 cm-1 and 0.69 cm l, respectively. Conclusion： The shielding property of （Cu50Zr45A15）99Sm1 BMG is between Pb and A1, and has potential application value.

关 键 词：非晶态合金 铜模吸铸法 Γ射线 屏蔽性能 

分 类 号：TL77[核科学技术—辐射防护及环境保护]