An enthalpy of solution of chromium in iron studied with ⁵⁷Fe M枚ssbauer spectroscopy

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• 作者：R. Idczak ; ^{ridczak@ifd.uni.wroc.pl} ; R. Konieczny ; J. Chojcan
• 关键词：Mossbauer spectroscopy ; Iron alloys ; Enthalpy of solution
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 June, 2012
• 卷：407
• 期：12
• 页码：2078-2081
• 文件大小：229 K

摘要

The room temperature M枚ssbauer spectra of ⁵⁷Fe were measured for iron-based solid solutions Fe_1鈭?em>xCr_x with x in the range 0.01鈮?em>x鈮?.05. The obtained data were analysed in terms of the binding energy E_b between two chromium atoms in the studied materials using the extended Hrynkiewicz-Kr贸las idea. It was found that the energy is positive or Cr atoms interact repulsively. The extrapolated value of E_b for x=0 was used for computation of an enthalpy of solution of Cr in Fe. The result was compared with corresponding data derived from calorimetric measurements and resulting from the cellular atomic model of alloys by Miedema as well as with the proper values given in the literature which were calculated on the basis of density functional theory (DFT). The comparison shows that our findings are in good agreement with the recent DFT computations for ferromagnetic Fe-Cr alloys.