Mössbauer and X-ray Study of Fe1−xAlx, 0.2⩽x⩽0.5, Samples Produced by Mechanical Alloying

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• 作者：Oyola Lozano ; D. ; Mart&Iacute ; nez ; Y. Rojas ; Bustos ; H. ; Pé ; rez Alcá ; zar ; G. A.
• 刊名：Hyperfine Interactions
• 出版年：2004
• 出版时间：2004
• 年：2004
• 卷：156
• 期：1
• 页码：569-574
• 全文大小：135 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Nuclear Physics, Heavy Ions and Hadrons
  Atoms, Molecules, Clusters and Plasmas
  Condensed Matter
  Surfaces and Interfaces and Thin Films
  
• 出版者：Springer Netherlands
• ISSN：1572-9540

文摘

In this work we report the magnetic and structural properties obtained by Mössbauer spectroscopy and X-ray diffraction, of the Fe_1−xAl_x, 0.2⩽x⩽0.5, alloys produced by mechanical alloying. Alloys with x=0.2, 0.3, 0.4 and 0.5, were for milled 12, 24, 36, and 48 hours. All the obtained alloys are in the bcc phase. The obtained Mössbauer spectra are characteristic of disordered ferromagnetic system. The lattice parameter remains nearly constant (∼2.91 Å) for all the milling times and compositions. The mean grain sizes in the (110) and (211) direction are nearly constants with the milling time but vary from 15.5 to 11 nm and from 10.5 to 8.5 nm when Al content grow between x=0.2 to x=0.4, respectively. The difference between the mean grain sizes in these two directions shows that the grains are of prolate spheroid form.