以点阵参数法测定了轻稀土金属La,Ce,Pr,Nd和Gd于熔体淬火条件下在Ag中固溶度的扩展.在10~5—10~6 K/s冷却速度下,它们在Ag中的亚稳极限固溶度分别为1.0,1.5,2.5,3.0和6.0at.-％。这些合金的固溶度扩展与镧系收缩成正比,并且符合作者早先对α(A)-A_mB_n型共晶系所提出的扩展机理和规律,还进一步讨论了平衡态固溶度的规律。
The metastable extension of solid solubility of certain light rare-earth, i.e. La, Ce, Pr, Nd and Gd, in Ag has evaluated by measurement of the lattice parameters of the quenched melts, made of separate metal with Ag. It was resulted that at the cooling rate about 10~5—10~6 K/s, their metastable limit solid solubility is 1.0, 1.5, 2.5, 3.0 and 6.0 at.-% respectively, which is directly proportional to the contractions of the lanthanide and conform to the authors' proposal on a(A)-A_mB_n eutectic systems. The solid solubility in equilibrium has been discussed.
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