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Journal Articles Physical Review Letters Year : 2018

Anti-Aging in Ultrastable Metallic Glasses

Abstract

As ultrastable metallic glasses (UMGs) are promising candidates to solve the stability issues of conventional metallic glasses, their study is of exceptional interest. By means of x-ray photon correlation spectroscopy, we have investigated the stability of UMGs at the atomic level. We find a clear signature of ultrastability at the atomic level that results in slower relaxation dynamics of UMGs with respect to conventional (rapidly quenched) metallic glasses, and in a peculiar acceleration of the dynamics by near Tg annealing. This surprising phenomenon, called here anti-aging, can be understood in the framework of the potential energy landscape. For all samples, the structural relaxation process can be described with a highly compressed shape of the density fluctuations, unaffected by thermal treatments and regardless of the ultrastability of the glass.
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Dates and versions

hal-02290273 , version 1 (20-01-2021)

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M. Luttich, Valentina Giordano, Sylvie Le Floch, E. Pineda, F. Zontone, et al.. Anti-Aging in Ultrastable Metallic Glasses. Physical Review Letters, 2018, 120 (13), pp.135504. ⟨10.1103/PhysRevLett.120.135504⟩. ⟨hal-02290273⟩
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