摘要
研究了净化Ni_(75)B_(17)Si_(8)合金液的方法以及净化对非晶形成能力的影响,通过净化工艺消除合金液内的异质质点可提高合金液的非晶形成能力;釆用净化和急冷相结合的工艺制备出了20×10×0.5(mm^3)的Ni-(75)B_(17)Si_(8)非晶合金试样。
Ni.sB17Si8 alloy melt is undercooled by more then 400 K at a cooling rate of 10-20K/s by means of cyclically superheating within a suitable slag and subsequently cyclically superheating at levitation state and under vacuum. The purified melt is quenched into copper slots to form metallic glass sheets. It is found that purification increased the critical thickness of the sheets at which metallic glass could be formed. Ni75B17Si8 metallic glass sheets of a thickness of 0.5 mm are formed by quenching the purified melt which can be undercooled by more than 400 K at a cooling rate 10 - 20 K/s.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1992年第5期A283-A287,共5页
Acta Aeronautica et Astronautica Sinica
关键词
合金净化
非晶形成能力
金属玻璃
purification of liquid alloy, metallic glass, glass forming ability
