APFIM studies of nanocrystallizations of amorphous alloys

K. Hono, Y. Zhang, A. Inoue, T. Sakurai

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    This paper reports recent atom probe analysis results of Fe-Zr-B(-Cu) and Al-Ni-Ce(-Cu) amorphous alloys, in which nanocrystalline microstructures develop by primary crystallization. In these alloy systems, enrichment of slow diffusing solute was found at the interfaces between primary crystals and amorphous matrix during the nucleation and growth stage. In the case of ternary Fe-Zr-B, no evidence for compositional heterogeneities were found prior to the onset of crystallization reaction. On the other hand, clustering of Cu atoms was observed in quaternary Fe-Zr-B-Cu alloy prior to the crystallization reaction. In the ternary Fe-Zr-B alloy, nucleation sites seem to be provided by the quenched-in nuclei which were observed as medium range ordered (MRO) domains by HREM. In the as-quenched Al-Ni-Ce(-Cu) alloy, compositional fluctuations were present from the as-quenched state. These observations suggest that nuclei for primary crystallization are provided in various forms such as MRO domains, solute clusters and compositional heterogeneities.

    Original languageEnglish
    Title of host publicationMaterials Research Society Symposium - Proceedings
    EditorsRudiger Bormann, Giorgio Mazzone, Robert D. Shull, Robert S. Averback, Ronald F. Ziolo
    PublisherMaterials Research Society
    Pages203-208
    Number of pages6
    Volume400
    Publication statusPublished - 1996
    EventProceedings of the 1995 Fall MRS Symposium - Boston, MA, USA
    Duration: 1995 Nov 271995 Nov 30

    Other

    OtherProceedings of the 1995 Fall MRS Symposium
    CityBoston, MA, USA
    Period95/11/2795/11/30

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials

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