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利用机械合金化制备出Nd60Fe20Al10Co10非晶粉末, 采用示差扫描量热仪(DSC), X射线衍射(XRD)和振动样品磁强计(VSM)考察了Nd60Fe20Al10Co10非晶的晶化转变过程及其对磁性能的影响规律, 用Kissinger方程计算了Nd60Fe20Al10Co10的晶化激活能, 从晶化动力学的角度讨论了玻璃形成能力与晶化反应速率常数的关系. 结果表明, Nd60Fe20Al10Co10合金的晶化过程为: 非晶+α-Fe→非晶+α-Fe+Nd→非晶+α-Fe+Nd+未知相Mx→α-Fe+Nd+未知相Mx+Co2Nd+AlCo. 晶化激活能E约为173 kJ*mol-1. 非晶相的的弛豫无序结构是Nd60Fe20Al10Co10具有硬磁性的原因. 完全晶化后硬磁性迅速消失.

参考文献

[1] Inoue A .Stabilization of metallic supercooled liquid and bulk amorphous alloys[J].Acta Materialia,2000,48:279.
[2] ZHANG Tao;Inoue A;Masumoto T .Amorphous Zr-Al-TM (TM=Co,Ni,Cu) alloys with significant supercooled liquid region of over 100 K[J].MATERIALS TRANSACTIONS,1991,32(11):1005.
[3] Masato Otsuki;Koichi Yuri .Consolidation and Mechanical Properties of High Strength Rapidly Solidified Al-TM-Ln Alloy Powder[J].粉体および粉末冶金,1996(10):1183-1187.
[4] Akihisa Inoue;Tao Zhang .Hard Magnetic Bulk Amorphous Nd-Fe-Al Alloys of 12 mm in Diameter Made by Suction Casting[J].Materials transactions,1996(4):636-640.
[5] K. Q. Qiu;H. F. Zhang;A. M. Wang;B. Z. Ding;Z. Q. Hu .Glass-forming ability and thermal stability of Nd_(70-x)Fe_(20)Al_(10)Y_x alloys[J].Acta materialia,2002(14):3567-3578.
[6] Akihisa Inoue;Tao Zhang .Bulk Nd-Fe-Al Amorphous Alloys with Hard Magnetic Properties[J].Materials transactions,1996(2):99-108.
[7] Peker A;Johnson W L .Highly processable metallic gla-ss:Zr41.2Ti31.8Cu12.5Ni10.0Be22.5[J].Applied Physics Letters,1993,63:2342.
[8] Ding J.;Wang X.Z.;Li Y. .Coercivity of rapidly quenched Nd60Fe30Al10 alloys[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1999(6):713-716.
[9] 魏炳忱,汪卫华,赵德乾,张勇,闻平,潘明祥,胡文瑞.硬磁性Nd60Al10Fe20Co10大块金属玻璃的 玻璃转变和晶化过程[J].中国科学A辑,2001(04):373-378.
[10] Kissinger H E .Variation of peak temperature with heating rate in differential thermal analysis[J].Res Nat Bur Standars,1956,36(07):866.
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