非晶状态下两相分离的X射线测定新方法

非晶状态下两相分离的X射线测定新方法 A NEW METHOD FOR THE INVESTIGATION OF PHASE SEPARATION IN AMORPHOUS STATE BY X-RAY SCATTERING 黄胜涛 Huang Shengtao first-author 用约化径向分布函数X射线散射测定法研究了Co 42.0 Ni 27.3 Fe 7.8 Si 8 B 14 金属玻璃在非晶状态下的两相分离,分析了两个新析出非晶相的结构。这种非晶状态下的两相分离可能是Spinodal分解机制产生的。我们提议用金属玻璃退火时相分离开始出现的温度和时间作为该金属玻璃热稳定性参数,以衡量该金属玻璃发生原子种类偏聚的难易程度。 The phase separation of Co 42.9 Ni 27.3 Fe 7.8 Si 8 B 14 metal glass in amor phous state is investigated by X-ray scattering method through the determin-ation of reduced radial distribution functions, and the structures of the se-parated amorphous phases are analysed. This phase separation in amorphous state is produced probably by the mechanism of spinodal decomposition. We suggest that the temperature and time of phase separation just appearing dur-ing annealing are taken as the parameters of the thermal stability of metal glasses, to judge the degree of difficulty for clustering of atomic species in annealed metal glasses. 中国科学院科学基金 1984-03-01 2021-04-01 3