Abstract
The devitrification sequences and mechanism are reported for a series of Al-Ni-Rare Earth amorphous alloys containing addition of Zr. The primary precipitation of a primitive cubic intermetallic occurs on continuous heating of amorphous alloys containing at least 6 at. % La as shown in A187Ni7La6 and Al87Ni6La6Zr, whereas Al is formed in A187Ni7La5Zr. The transformation can turn eutectic-like in both the above alloys with formation of the intermetallic and Al when it is accomplished on isothermal annealing. This induces a surprising effect on the subsequent matrix crystallization which is shifted to high temperature with respect to conventional scans made on continuous heating. The implications of the findings for diffusion in the matrix, nucleation and growth mechanisms are discussed.
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Battezzati, L., Ronto, V., Kusý, M. (2005). On Different Mechanisms of Primary Crystallization in Al-Ni-La-Zr Amorphous Alloys. In: Idzikowski, B., Švec, P., Miglierini, M. (eds) Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors. NATO Science Series, vol 184. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2965-9_25
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DOI: https://doi.org/10.1007/1-4020-2965-9_25
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-2963-9
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