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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >The effect of Mn and Al dopants on the beta-FeSi_2 stabilization by a two-step route: Mechanical alloying and annealing
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The effect of Mn and Al dopants on the beta-FeSi_2 stabilization by a two-step route: Mechanical alloying and annealing

机译：Mn和Al掺杂剂通过两步路线对β-FeSi_2稳定的影响：机械合金化和退火

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摘要

Al and Mn dopant influence on beta-FeSi_2 phase formation was studied using X-ray diffraction and Mossbauer spectroscopy. Samples of Fe_(1-x)R_xSi_2 (R = Al, Mn with 0.00 < = x < = 0.12) were prepared by the simultaneous mill of pure Si, Fe and R, under Ar atmosphere followed by an annealing at 1123 K during 4h at 1.33 X 10~(-5) Pa. The results indicate that the addition of Al improved the stabilization of beta-FeSi_2 phase, reducing the amount of s-FeSi from 20 percent to 6 percent. Also a preferential substitution at the Fe- site II by Mn atoms in beta-FeSi_2 can be inferred from the present study. The sequence of phase formation is summarised by two reactions that account for the milling and the annealing effects.
机译：利用X射线衍射和莫斯鲍尔光谱研究了铝和锰掺杂剂对β-FeSi_2相形成的影响。 Fe_（1-x）R_xSi_2（R = Al，Mn = 0.00 <= x <= 0.12）样品是通过在Ar气氛下同时研磨纯Si，Fe和R，然后在1123 K下进行4h退火制备的结果表明，在1.33 X 10〜（-5）Pa时，Al的添加改善了β-FeSi_2相的稳定性，使s-FeSi的含量从20％降低至6％。从本研究中还可以推断出β-FeSi_2中的Fe位点II被Mn原子优先取代。相形成的顺序由两个反应总结，这两个反应说明了研磨和退火效应。

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