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- W2068221427 abstract "In this article, we examine the unusual plastic deformation under uniaxial compression of an Al 2 O 3 -15 mol.% Y 2 O 3 (A15Y) glass synthesized by a wet chemical route. At a low temperature of 650-725 °C, plastic deformation of this glass is largely non-viscous through shear instabilities. In contrast, deformation near the crystallization temperature (850 °C) occurs homogeneously with work hardening and with a monotonic increase in the true density of the glass by 10-12%, accompanied by an increase in hardness (H) and elastic modulus (E) of up to 100%. We hypothesize a phenomenon of molecular densification of the amorphous structure through a hierarchy of multiple phases, analogous to density- or entropy-driven amorphous-to-amorphous phase transitions (polyamorphism). These results suggest that the present method of preparation and the unusual behavior can trigger a search for many more systems that display such behavior." @default.
- W2068221427 created "2016-06-24" @default.
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- W2068221427 date "2011-01-01" @default.
- W2068221427 modified "2023-09-27" @default.
- W2068221427 title "Deformation and structural densification in Al2O3–Y2O3 glass" @default.
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- W2068221427 doi "https://doi.org/10.1016/j.actamat.2010.09.010" @default.
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