Relaxation processes of two glass transitions for a Zr sub(60)Al sub(15)Ni sub(25) amorphous alloy

The relaxation behavior for the glass transition of a Zr sub(60)Al sub(15)Ni sub(25) amorphous alloy with a wide supercooled liquid region is investigated through the changes of dynamic mechanical properties. Temperature-dependent storage and loss moduli reveal two relaxation systems suggesting two...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE 1992-01, Vol.31 (10), p.3403-3407
Main Authors: Okumura, Hiroshi, Inoue, Akihisa, Masumoto, Tsuyoshi
Format: Article
Language:English
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Summary:The relaxation behavior for the glass transition of a Zr sub(60)Al sub(15)Ni sub(25) amorphous alloy with a wide supercooled liquid region is investigated through the changes of dynamic mechanical properties. Temperature-dependent storage and loss moduli reveal two relaxation systems suggesting two glass transitions. The activation energies are 400 and 420 kJ/mol for the lower and the higher temperature relaxations, respectively. Both of these relaxations have wider distribution of the relaxation time than that of the single relaxation of the Debye peak. The appearance of the two relaxation systems is attributed to the phase separation in the amorphous phase observed in the electron micrograph.
ISSN:0021-4922