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Some structural and magnetic properties of Fe-Al-C and Fe-Mn-Al-C alloys

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Abstract

The remanence and coercivity of Fe-Al-C and Fe-Mn-Al-C alloys have been measured and studied as a function of ageing at 623 K. The resulting formation and growth of carbide precipitates of Fe3AlC and Mn3AlC in the same samples have been investigated by transmission and scanning electron micoscope techniques. The addition of Manganese to the Fe-Al-C alloy is shown to be severely deleterious to the magnetic properties of the resulting quaternary alloy; however, simultaneously, the electron diffraction and microscopic studies demonstrate that the structural order of the carbide precipitates is considerably improved. It is concluded that this observed decline in the magnetic properties of this alloy system is related to the formation of Mn3AlC in preference to Fe3AlC carbide precipitates.

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Authors and Affiliations

  1. Magnet Centre, Sunderland Polytechnic, Langham Tower, Ryhope Road, Sunderland, UK

    I. Briggs, G. J. Russell & A. G. Clegg

  2. Department of Applied Physics and Electronics, University of Durham, South Road, DH1 3LE, Durham, UK

    G. J. Russell

Authors
  1. I. Briggs
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  2. G. J. Russell
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  3. A. G. Clegg
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Briggs, I., Russell, G.J. & Clegg, A.G. Some structural and magnetic properties of Fe-Al-C and Fe-Mn-Al-C alloys. J Mater Sci 20, 668–673 (1985). https://doi.org/10.1007/BF01026541

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  • DOI: https://doi.org/10.1007/BF01026541

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