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Magnetism and high magnetic-field-induced stability of alloy carbides in Fe-based materials
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2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, no 1Article in journal (Refereed) Published
Abstract [en]

© 2018 The Author(s). Understanding the nature of the magnetic-field-induced precipitation behaviors represents a major step forward towards unravelling the real nature of interesting phenomena in Fe-based alloys and especially towards solving the key materials problem for the development of fusion energy. Experimental results indicate that the a pplied high magnetic field effectively promotes the precipitation of M 23 C 6 carbides. We build an integrated method, which breaks through the limitations of zero temperature and zero external field, to concentrate on the dependence of the stability induced by the magnetic effect, excluding the thermal effect. We investigate the intimate relationship between the external field and the origins of various magnetics structural characteristics, which are derived from the interactions among the various Wyckoff sites of iron atoms, antiparallel spin of chromium and Fe-C bond distances. The high-magnetic-field-induced exchange coupling increases with the strength of the external field, which then causes an increase in the parallel magnetic moment. The stability of the alloy carbide M 23 C 6 is more dependent on external field effects than thermal effects, whereas that of M 2 C, M 3 C and M 7 C 3 is mainly determined by thermal effects.

Place, publisher, year, edition, pages
2018. Vol. 8, no 1
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Metallurgy and Metallic Materials
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URN: urn:nbn:se:kth:diva-227676DOI: 10.1038/s41598-018-20910-3OAI: oai:DiVA.org:kth-227676DiVA, id: diva2:1205123
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QC 20180604

Available from: 2018-05-10 Created: 2018-05-10 Last updated: 2018-06-04Bibliographically approved

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