Establishment of a novel methodology for the determination of the solubility limits in metallic solid solutions.

建立了一种测定金属固溶相溶解度极限的新方法。所提出的方法包括将C和/或B溅射到抛光良好的试样上，然后通过辉光放电光学发射光谱从表面获得向内浓度分布。对已建立的Ni-C二元合金体系进行了可行性验证，所得数据与文献数据一致，证实了该方法的有效性。在此基础上，本研究确定了C在Pt中的溶解度极限，这是迄今为止未知的。

A novel method has been established for the determination of the solubility limits of metallic solid solusion phase. The proposed method includes the sputtering of C and/or B on to the well-polished specimen, followed by aquision of inward concentration profiles from the suface by glow discharge optical emission spectroscopy. A feasibility check was done on a well-established alloy system of the Ni-C binary, and the present method was confimed to be effective, since the obtained data agreed with the data in literature. Based on this knowledge, the solubility limit of C in Pt, which had been unknown so far, was determined in this study.