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Air‐Oxidation of a Cu 45 Zr 45 Al 5 Ag 5 Bulk Metallic Glass
Author(s) -
Kai Wu,
Ren I Fei,
Kao Pei Chin,
Wang Rui Fang,
Chuang ChihPin,
Freels Matthew W.,
Liaw Peter K.
Publication year - 2009
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200800366
Subject(s) - amorphous metal , materials science , amorphous solid , alloy , diffusion , substrate (aquarium) , kinetics , oxygen , metallurgy , metal , analytical chemistry (journal) , thermodynamics , crystallography , chemistry , physics , oceanography , organic chemistry , chromatography , quantum mechanics , geology
This work studied the oxidation behavior of a Ag‐containing Cu–Zr–Al‐based amorphous alloy (CZA4‐BMG) in dry air at 375–500 °C. The oxidation kinetics of CZA4‐BMG obeyed a multi‐stage parabolic‐rate law, and its steady‐state oxidation‐rate constants were slightly lower than those of Ag‐free amorphous alloy (CZA3‐BMG) at the temperature below 450 °C, indicating that the addition of Ag played a partly blocking effect in reducing the available cross‐sections of the substrate, which in turn reduced inward diffusion of oxygen, thereby leading to the reduction of oxidation rates for CZA4‐BMG.