期刊
ACTA MATERIALIA
卷 94, 期 -, 页码 134-142出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.04.038
关键词
Oxidation; Amorphous oxide; Thermodynamics; Al-Zr; Auger depth profiling
During thermal oxidation of binary amorphous AlxZr1-x solid solutions over wide alloy-composition (0.26 <= x <= 0.68) and oxidation-temperature (350-560 degrees C) ranges, a single amorphous ternary oxide phase of well-defined stoichiometry, (Al0.33Zr0.67)O-1.83, emerges. The composition of this unexpectedly stoichiometric ternary amorphous oxide phase, that develops instead of the crystalline oxide phases Al2O3 and ZrO2, under conditions far away from genuine thermodynamic equilibrium, is governed by thermodynamics, as demonstrated by thermodynamic assessment, adopting the amorphous (Al0.33Zr0.67)O-1.83 phase as a supercooled liquid oxide oxide (Al2O3-ZrO2) solution phase. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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