秦晓英
,
张立德
,
侯碧辉
,
梁任又
,
纪小丽
金属学报
用Ｘ射线衍射及透射电镜研究用惰性气体凝聚法制备纳米ＮｉＡｌ合金固体的结构结果表明，纳米ＮｉＡｌ合金晶体结构与常规ＮｉＡｌ结构一致，平均粒度为８．６ｎｍ，具有较大的晶格（显微）畸变（ε＝１．２％），长程有序度有所降低。退火实验显示，当温度低于８００Ｋ时晶粒不明显长大，具有较好的抗晶粒生长能力。磁共振及磁化研究表明，当ＮｉＡｌ合金制成纳米结构后由弱（或非）磁性转变为强磁性，这种磁性转变可能与具较大的晶格畸变及长程有序度的破坏有关。
关键词:
纳米固体
,
NiAl alloy
,
structure
,
magnetism
J.T. Guo
,
L.Z. Zhou
,
Z.G. Liu and W.M. Yin(Institnte of Metal Research
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China Manuscript received 26 August 1996)
金属学报(英文版)
Ternary Ni-Al-Fe alloys with different Fe-additions have been synthesized by mechan ical alloying.The results show that 5 and 10 at% Fe-additions prolong the milling time prior to the explosive formation of NiAl(Fe) compound, 15 at.% Fe-addition results in the formation of an "amorphous-like" phase,20 at.% Fe-addition turns the final products to Ni(Al, Fe)supersaturated solid solution with fcc structure,and the increase of Fe-addition can speed up the formation of the solid solution.The addition of Fe improves the plastic deformation ability of the alloys.
关键词:
:mechanical alloying
,
null
,
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