Amorphous Formation in an Undercooled Binary Ni-Si Alloy under Slow Cooling Rate  

作　　者：Yiping Lu Gencang Yang Xiong Li Yaohe Zhou 

机构地区：[1]State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xilan 710072, China

出　　处：《Journal of Materials Science & Technology》2009年第3期370-372,共3页材料科学技术（英文版）

基　　金：supported financially by the National Natural Science Foundation of China (No. 50395103);the Doctorate Foundation of North western Poly technical University (CX200506)

摘　　要：High undercooling up to 392 K was achieved in eutectic Ni70.2Si29.8 alloy melt by using glass fluxing combined with cyclic superheating. A small quantity of amorphous phase was obtained in bulk eutectic Ni70.2Si29.8 alloy when undercooling exceeds 240 K under slow cooling conditions （about 1 K/s）. The amorphous phase was confirmed by high-resolution transmission electron microscopy and differential scanning calorimetry.High undercooling up to 392 K was achieved in eutectic Ni70.2Si29.8 alloy melt by using glass fluxing combined with cyclic superheating. A small quantity of amorphous phase was obtained in bulk eutectic Ni70.2Si29.8 alloy when undercooling exceeds 240 K under slow cooling conditions （about 1 K/s）. The amorphous phase was confirmed by high-resolution transmission electron microscopy and differential scanning calorimetry.

关 键 词：Eutectic alloy Amorphous phase Rapid solidification 

分 类 号：TG111.4[金属学及工艺—物理冶金] TG139.8[金属学及工艺—金属学]