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Mechanism and kinetics of nano-crystallization of the thermally stable NiNb(ZrTi)Al metallic glasses

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Abstract

The structure and crystallization of melt spun ribbons of composition Ni58Nb x (ZrTi)1−x Al y , (x = 5, 10, 20, and 25, y = 3, 7 at%) were investigated. It was found that the crystallization of the amorphous phase proceeded with different phase composition and kinetics in case of the alloys containing more than 15 at% Nb. In case of the smaller content of Nb, cubic NiTi(Zr) phase crystallized rapidly. The alloy crystallized completely. In alloys with higher Nb content, a smaller volume, up to 50% of the amorphous phase crystallized much slower. The resulting phase composition contained cubic NiTi(Zr) and orthorhombic Ni6.5Nb6.5 phases. The activation energies resulting from the Kissinger and Ozawa equations were determined.

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  1. Institute of Metallurgy and Materials Sciences, Polish Academy of Sciences, Reymonta 25 St, 30-059, Krakow, Poland

    Tomasz Czeppe

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  1. Tomasz Czeppe
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Correspondence to Tomasz Czeppe.

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Czeppe, T. Mechanism and kinetics of nano-crystallization of the thermally stable NiNb(ZrTi)Al metallic glasses. J Therm Anal Calorim 101, 615–622 (2010). https://doi.org/10.1007/s10973-010-0938-y

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  • DOI: https://doi.org/10.1007/s10973-010-0938-y

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