NING Yuantao Institute of Precious Metals
,
Kunming
,
China Associate Professor
,
Institute of Precious Metals
,
Kunming
,
Yunnan
,
China
金属学报(英文版)
A criterion of the metastable extension of solid solubility was proposed.When the eutectic concentration arm ratio parameter of an alloy,J>10,the hypereutectic extension and the metastable solid solubility limit beyond eutectic concentration may be obtained.When J≤10, the hypoeutectic extension may be obtained.The extension parameter,C_(eq)~s/C_(cu),is directly proportional to the parameter J.Thus,it seems easy to predict the tendency of the solid solu- hility extension under rapid solidification on the basis of the eutectic phase diagram.
关键词:
eutectic system
,
null
,
null
NING Yuantao LI Yongnian Kunming Institute of Precious Metals
,
China Ning Yuantao
,
Professor
,
Institute of Precious Metals
,
Kunming
,
Yunnan
,
China
金属学报(英文版)
The influence of rare-earth elements,La,Ce,Pr,Nd,Sm,Eu,Gd,Dy,Ho,Er and Yb on the thermal stability of PdSi_(16.5) glass was studied systematically by means of DSC.All rare-earth elements,especially heavy ones,increase obviously the thermal stability parameters,including T_θ(T_g ,T_x ,T_g),T_(rg) and ΔE etc.The crystallization temperatures T_(p1) and T_(p2) increase linearly with the lanthanide constriction increasing,but Eu shows an anomalous influence:Pd-Si-Eu metallic glass possesses the highest thermal stability and the lowest concentration limit of glass forming among Pd-Si-R glasses.
关键词:
thermal stability
,
null
,
null
,
null
