Effect of repeated melting of the mother ingot on the thermal stability of a Zr6oAl15Ni25 bulk glassy alloy  

作　　者：YAN Zhijie , LI Jinfu WANG Honghua HE Shunrong and ZhOU Yaohe1) State Key Lab. of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200030, China2) Taiyuan Heavy Machinery Institute, Taiyuan 030024, China 

出　　处：《Rare Metals》2003年第3期206-209,共4页稀有金属（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No. 50071032)

摘　　要：The effect of repeated melting of the mother ingot on the thermal stabilityof a Zr_(60)Al_+(15)Ni_(25) glassy alloy was investigated by differential scanning calorimetry(DSC). Experimental results indicate that after the repeated melting of the ingots at 1300 and 1580K, the glass transition temperature T_g increases from 686.4 to 690.7 and 696.8 K and the onsettemperature of crystallization T_x from 757.9 to 758.6 and 763.4 K, respectively, indicating thatthe thermal stability becomes higher after the repeated arc melting of the mother ingot and that itis more effective at higher temperature. Within the framework of structure heredity, the origin ofthe improvement of the thermal stability of Zr_(60)Al_+(15)Ni_(25) bulk glassy alloy is discussed.The effect of repeated melting of the mother ingot on the thermal stabilityof a Zr_(60)Al_+(15)Ni_(25) glassy alloy was investigated by differential scanning calorimetry(DSC). Experimental results indicate that after the repeated melting of the ingots at 1300 and 1580K, the glass transition temperature T_g increases from 686.4 to 690.7 and 696.8 K and the onsettemperature of crystallization T_x from 757.9 to 758.6 and 763.4 K, respectively, indicating thatthe thermal stability becomes higher after the repeated arc melting of the mother ingot and that itis more effective at higher temperature. Within the framework of structure heredity, the origin ofthe improvement of the thermal stability of Zr_(60)Al_+(15)Ni_(25) bulk glassy alloy is discussed.

关 键 词：bulk glassy alloy thermal stability differential scanning calorimetry structure heredity ZrAlNi alloy 

分 类 号：TG139[一般工业技术—材料科学与工程]