Título:
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Anti-aging in ultrastable metallic glasses
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Autor/a:
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Lüttich, Martin; Giordano, Valentina; LeFloch, Sylvie; Pineda Soler, Eloi; Zontone, Federico; Luo, Yuansu; Samwer, Konrad; Ruta, Beatrice
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
Abstract:
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This is the author final draft version of article https://doi.org/10.1103/PhysRevLett.120.135504 |
Abstract:
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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 T g 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. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Física::Termodinàmica -Metallic glasses -Collective dynamics -Glasses -Metallic glasses -Coherent X-ray scattering -Vidres metàl·lics |
Derechos:
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Tipo de documento:
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Artículo - Versión actualizada Artículo |
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