Pronounced slow β-relaxation in La-based bulk metallic glasses.

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Output type: Journal article

Author list: Wang, Yu, Wen, Bai, Wang

Publisher: IOP Publishing

Publication year: 2011

Volume number: 23

Issue number: 14

ISSN: 0953-8984

eISSN: 1361-648X

Languages: English-Great Britain (EN-GB)

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Open access status: closed

Abstract

Most metallic glasses (MGs) exhibit weak evidence of slow β-relaxation in their dynamic mechanical spectroscopy spectra. In contrast to other MGs, the La-based MGs we report here show a distinct slow β-relaxation peak in the mechanical relaxation measurements. We find that the slow β-relaxation behavior can be tuned by modification of the chemical composition and fragility. The structural origin of the slow β-relaxation and correlation between β-relaxation and α-relaxation in the MGs are also discussed. MGs with pronounced slow β-relaxation and tunable properties might provide a model system to investigate some long-standing issues in the glass field.

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