The effect of Mn and Al dopants on the β-FeSi2 stabilization by a two-step route: Mechanical alloying and annealing

Autor:	J. A. Martínez, S.M. Cotes, Judith Desimoni, J. Runco, Marcela Andrea Taylor
Rok vydání:	2009
Předmět:	Diffraction Materials science Mössbauer effect Dopant business.industry Annealing (metallurgy) Mechanical Engineering Doping Metallurgy Metals and Alloys Semiconductor Mechanics of Materials Mössbauer spectroscopy X-ray crystallography Materials Chemistry Physical chemistry business
Zdroj:	Journal of Alloys and Compounds. 477:789-794
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2008.10.113
Popis:	Al and Mn dopant influence on β-FeSi 2 phase formation was studied using X-ray diffraction and Mossbauer spectroscopy. Samples of Fe 1− x R x Si 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 4 h at 1.33 × 10 −5 Pa. The results indicate that the addition of Al improved the stabilization of β-FeSi 2 phase, reducing the amount of ɛ-FeSi from 20% to 6%. Also a preferential substitution at the Fe- site II by Mn atoms in β-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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::74e168c7213cc331c13ad2d312e5b9de https://doi.org/10.1016/j.jallcom.2008.10.113 Zobrazit plný text záznamu Full Text from ScienceDirect