Paper Title:
A Study on the Optimization of Reduction-Diffusion Process for Synthesis of Sm2Fe17Nx Nanopowder
  Abstract

The present investigation attempted to optimize the R-D (reduction-diffusion) process for fabricating Sm2Fe17 nanoscale powder from ball-milled powders of samarium oxide and iron oxide using a solid reducing agent of calcium hydrides (CaH2). It was found that the target alloy phase of Sm2Fe17 can be produced by controlling the gas atmosphere in the process of powder preparation to R-D reaction. Powder handling of CaH2 in a protective atmosphere is essential to avoid the formation of Ca(OH)2 which suppresses calcium formation. A switching gas atmosphere of H2 to Ar-H2 during the R-D process at 350oC resulted in a reduction of Fe2O3 and alloying of Sm-Fe, consequently forming nanocrystalline Sm2Fe17.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
1796-1801
DOI
10.4028/www.scientific.net/MSF.638-642.1796
Citation
J.C. Yun, S.S. Jung, J. G. Lee, C.J. Choi, J. S. Lee, "A Study on the Optimization of Reduction-Diffusion Process for Synthesis of Sm2Fe17Nx Nanopowder", Materials Science Forum, Vols. 638-642, pp. 1796-1801, 2010
Online since
January 2010
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