Mössbauer studies of phase separation in nanocrystalline Fe_0.55−xCr_0.45Sn_x alloys prepared by mechanical alloying

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• 作者：Costa ; B.F.O. ; Le Caë ; r ; G. ; Luyssaert ; B.
• 关键词：Transition metal alloys ; Nanocrystalline materials ; Mechanical alloying ; Mö ; ssbauer spectroscopy
• 刊名：Journal of Alloys and Compounds
• 出版年：2003
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：February 17, 2003
• 卷：350
• 期：1-2
• 页码：36-46
• 文件大小：908 K

摘要

Mössbauer spectrometry (⁵⁷Fe and ¹¹⁹Sn) was used to investigate phase separation in coarse-grained Fe_0.55Cr_0.45 and in mechanically-alloyed nanocrystalline Fe_0.55Cr_0.45, Fe_0.52Cr_0.45Sn_0.03 and Fe_0.49Cr_0.45Sn_0.06 alloys during isothermal annealing at 748 K. Phase separation occurs faster in nanocrystalline Fe–Cr than in cold-rolled coarse-grained alloys. The effect of the interconnected microstructure on room-temperature hyperfine magnetic field distributions of alloys aged for hundreds of hours is qualitatively discussed. Tin hinders grain growth of nanocrystalline alloys.