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Devitrification behavior around supercooled liquid region of an Al85Ni5Y8Co2 metallic glass

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Abstract

Melt-spun and annealed Al85Ni5Y8Co2 metallic glass, with a large supercooled liquid region, were investigated by means of differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and small-angle x-ray scattering (SAXS). TEM studies revealed that the as-quenched ribbons were fully amorphous. Further, the SAXS measurements showed that no evidence for compositional inhomogeneities associated with amorphous phase separation was found in the as-quenched state and the early stage annealing prior to devitrification. The primary crystallization of this glass was characterized, intriguingly, which appeared to be proceeded with an initial thermal relaxation, then α-Al nanocrystal nucleation with a limited number, finally a high density of nanocrystals nucleation and growth.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    H. W. Yang & J. Q. Wang

  2. National Institute for Materials Science, Tsukuba, 305-60047, Japan

    M. Ohnuma

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  1. H. W. Yang
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  2. M. Ohnuma
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  3. J. Q. Wang
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Correspondence to J. Q. Wang.

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Yang, H.W., Ohnuma, M. & Wang, J.Q. Devitrification behavior around supercooled liquid region of an Al85Ni5Y8Co2 metallic glass. Journal of Materials Research 21, 2215–2223 (2006). https://doi.org/10.1557/jmr.2006.0295

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