Air-oxidation of a Zr50Cu43Al7 bulk metallic glass at 400–500°C
Source abstract
Abstract
Abstract Air-oxidation behavior of a Zr 50 Cu 43 Al 7 bulk metallic glass (ZCA7-BMG) was studied over the temperature range of 400–500 °C. The oxidation kinetics of the ZCA7-BMG generally followed a multiple-stage parabolic-rate law with its steady-state parabolic-rate constants ( k p values) decreasing with increasing temperature, indicative of the occurrence of kinetics inversion. The scales formed on the ZCA7-BMG were strongly dependent on temperature, consisting mostly of tetragonal ZrO 2 and CuO, and minor amounts of monoclinic ZrO 2 and Cu 2 O at 400 °C, while Cu 2 O was completely absent at T ⩾ 450 °C. In addition, a minor amount of Al 2 O 3 was further observed after the oxidation at 500 °C, whose formation is responsible for the lowest oxidation rate, as compared to those at T ⩽ 450 °C.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Material Dynamics and Properties · Glass properties and applications
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References (20)
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