Precipitation of Fe-rich intermetallic phases in liquid Al-13.58Si-11.59Fe-1.19Mn alloy

P. Orozco-González, M. Castro-Román, Arturo I. Martínez, M. Herrera-Trejo, A. A. López, J. Quispe-Marcatoma

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7 Scopus citations

Abstract

To contribute to the understanding of the Al-Fe-Mn-Si system, an exhaustive analysis of the intermetallic phases formed during thermal analysis experiments and specific isothermal treatments was carried out. In this work, three different phases were identified: the extensively reported β and α phases and the τh phase. The τh phase has been reported for the ternary Al-Fe-Si system, but not for the quaternary Al-Fe-Mn-Si system. Nonetheless, the present results suggest that the formation of the τh phase upon solidification of the alloy can be stabilized in the quaternary Al-Fe-Mn-Si system, with respect to the monoclinic θ-Al3Fe phase in the ternary Al-Fe-Si system, due to the Mn addition. The τh phase was unambiguously identified with the help of complementary techniques such as SEM/EDS, X-ray diffraction and Mössbauer spectroscopy.

Original languageEnglish
Pages (from-to)1617-1622
Number of pages6
JournalIntermetallics
Volume18
Issue number8
DOIs
StatePublished - Aug 2010

Bibliographical note

Funding Information:
The authors are grateful to the National Council for Science and Technology of Mexico (Conacyt) for the financial support provided to carry out this work (project no. 84966 ).

Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.

Keywords

  • A. Aluminides
  • B. Crystallography
  • C. Crystal growth
  • F. Diffraction
  • Phase identification

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