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

XING Liqian , CHEN Xichen , Institute of Physics , Academia Sinica , Beijing , ChinaYANG Gencang , ZHOU Yaohe , Northwestern Polytechnic University , Xi'an , ChinaGUO Zhenqi , Northwestern University , Xi'an , China XING Liqian , Postdoctoral , Institute of Physics , Academia Sinica , Beijing 100080 , China

金属学报(英文版)

The glass formability of Ni_(75)B_(17)Si_8 melt and the thermostability of this metallic glass formed from the the melt can be enhanced by eliminating the heterogeneous catalystg. The purification was done by cyclical superheating melt in special glasses and subsequently cyclically superheating it in an electromagnetic levitation apparatus. The purified Ni_(75)B_(17)Si_8 amorphous sample sized up to 20 ~ I0 x 0.5 mm was prepared as four times the thickness of unpurified ones.

关键词: metallic glass , null , null , null

熔体过热度对Nd9Fe85-xTi4C2Bx(x=10,12)磁性合金过冷度和非晶形成的影响

杨梦琳 , 潘晶 , 刘新才 , 肖晓燕 , 詹玉勇

中国有色金属学报(英文版) doi:10.1016/S1003-6326(16)64389-3

采用差热分析及凝固组织研究Nd9Fe85?xTi4C2Bx(x=10,12)合金熔体过热度对其过冷度以及凝固组织的影响。结果表明:Nd9Fe85?xTi4C2Bx(x=10,12)合金的过冷度随熔体过热度的增大而显著增大,且每种合金均出现两个对应于平均过冷度急剧增大的临界过热度。两个平均过冷度转折点的存在与过热熔体中的结构转变有关,这最终导致凝固组织中非晶相体积分数的增加。

关键词: 磁性合金 , 熔体过热 , 过冷度 , 结构转变 , 非晶形成能力

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