INFLUENCE OF PURIFICATION ON GLASS FORMABILITY AND THERMOSTABILITY OF METALLIC GLASS Ni_(75)B_(17)Si_8

The glass formability of NiBSimelt and the thermostability of this metallic glass formedfrom the the melt can be enhanced by eliminating the heterogeneous catalystg. The purificationwas done by cyclical superheating melt in special glasses and subsequently cyclicallysuperheating it in an electromagnetic levitation apparatus. The purified NiBSiamorphoussample sized up to 20 ~ I0 x 0.5 mm was prepared as four times the thickness of unpurifiedones.

净化对非晶形成能力和非晶热稳定性的影响

采用玻璃熔体净化法和电磁悬浮循环过热法消除Ni_(75),B_(17)Si_R合金液内的异质核心,研究了净化对该合金液非晶形成能力和所形成的非晶合金热稳定性的影响。采用净化和忽冷相结合的工艺制备出了20×10×0.5mm的Ni_(75)B_(17)Si_8非晶试样,试样的厚度较净化前提高了4倍。