【摘要】 对电弧炉熔炼的Nd2 (Mn1 -x,Alx) 1 7(x =1～ 10 )化合物进行了X射线衍射研究。结果表明 ,Nd2 (Mn1 -x,Alx) 1 7(x =1～ 10 )化合物具有Th2 Zn1 7型结构 ,随着Al替代量的增加 ,Nd2 (Mn1 -x,Alx) 1 7(x =1～ 10 )化合物的晶格常数a ,c及单胞体积V都增加。对样品的时效研究表明 ,Nd2 (Mn1 -x,Alx) 1 7(x =1～ 10 )化合物在自然环境中十分稳定 ,这表明Al比C更能使富锰的 2∶17相 (Th2 Zn1 7)稳定。更多还原

【Abstract】 The Nd 2(Mn 1- x Al x ) 17 ( x =1～10) compounds were prepared by arc melting in an argon atmosphere of high purity. The structure properties of these compounds were investigated by X ray diffraction. It was found that the Nd 2(Mn 1- x Al x ) 17 ( x =1～10) compounds have single phase with Th 2Zn 17 type structure. With increasing x, the unit cell volume V , the lattice constants a and c of Nd 2(Mn 1- x Al x ) 17 compounds are increased. The Nd 2(Mn 1- x Al x ) 17 compound is very stable in air. This shows that the aluminum can help the formation and stabilization of the Nd 2(Mn 1- x Al x ) 17 compounds much better than carbon.更多还原