Intrinsic correlation between β-relaxation and spatial heterogeneity in a metallic glass

F. Zhu; H. K. Nguyen; S. X. Song; Daisman P.B. Aji; A. Hirata; H. Wang; K. Nakajima; M. W. Chen

doi:10.1038/ncomms11516

Intrinsic correlation between β-relaxation and spatial heterogeneity in a metallic glass

F. Zhu, H. K. Nguyen, S. X. Song, Daisman P.B. Aji, A. Hirata, H. Wang, K. Nakajima, M. W. Chen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

185 Citations (Scopus)

Abstract

β-Relaxation has long been attributed to localized motion of constituent molecules or atoms confined to isolated regions in glasses. However, direct experimental evidence to support this spatially heterogeneous scenario is still missing. Here we report the evolution of nanoscale structural heterogeneity in a metallic glass during β-relaxation by utilizing amplitude-modulation dynamic atomic force microscopy. The successive degeneration of heterogeneity during β-relaxation can be well described by the Kohlrausch-Williams-Watts equation. The characteristic relaxation time and activation energy of the heterogeneity evolution are in accord with those of excess enthalpy release by β-relaxation. Our study correlates β-relaxation with nanoscale spatial heterogeneity and provides direct evidence on the structural origins of β-relaxation in metallic glasses.

Original language	English
Article number	11516
Journal	Nature communications
Volume	7
DOIs	https://doi.org/10.1038/ncomms11516
Publication status	Published - 2016 May 9
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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abstract = "β-Relaxation has long been attributed to localized motion of constituent molecules or atoms confined to isolated regions in glasses. However, direct experimental evidence to support this spatially heterogeneous scenario is still missing. Here we report the evolution of nanoscale structural heterogeneity in a metallic glass during β-relaxation by utilizing amplitude-modulation dynamic atomic force microscopy. The successive degeneration of heterogeneity during β-relaxation can be well described by the Kohlrausch-Williams-Watts equation. The characteristic relaxation time and activation energy of the heterogeneity evolution are in accord with those of excess enthalpy release by β-relaxation. Our study correlates β-relaxation with nanoscale spatial heterogeneity and provides direct evidence on the structural origins of β-relaxation in metallic glasses.",

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AU - Zhu, F.

AU - Nguyen, H. K.

AU - Song, S. X.

AU - Aji, Daisman P.B.

AU - Hirata, A.

AU - Wang, H.

AU - Nakajima, K.

AU - Chen, M. W.

PY - 2016/5/9

Y1 - 2016/5/9

N2 - β-Relaxation has long been attributed to localized motion of constituent molecules or atoms confined to isolated regions in glasses. However, direct experimental evidence to support this spatially heterogeneous scenario is still missing. Here we report the evolution of nanoscale structural heterogeneity in a metallic glass during β-relaxation by utilizing amplitude-modulation dynamic atomic force microscopy. The successive degeneration of heterogeneity during β-relaxation can be well described by the Kohlrausch-Williams-Watts equation. The characteristic relaxation time and activation energy of the heterogeneity evolution are in accord with those of excess enthalpy release by β-relaxation. Our study correlates β-relaxation with nanoscale spatial heterogeneity and provides direct evidence on the structural origins of β-relaxation in metallic glasses.

AB - β-Relaxation has long been attributed to localized motion of constituent molecules or atoms confined to isolated regions in glasses. However, direct experimental evidence to support this spatially heterogeneous scenario is still missing. Here we report the evolution of nanoscale structural heterogeneity in a metallic glass during β-relaxation by utilizing amplitude-modulation dynamic atomic force microscopy. The successive degeneration of heterogeneity during β-relaxation can be well described by the Kohlrausch-Williams-Watts equation. The characteristic relaxation time and activation energy of the heterogeneity evolution are in accord with those of excess enthalpy release by β-relaxation. Our study correlates β-relaxation with nanoscale spatial heterogeneity and provides direct evidence on the structural origins of β-relaxation in metallic glasses.

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Intrinsic correlation between β-relaxation and spatial heterogeneity in a metallic glass

Abstract

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