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Title: Air-oxidation of a Zr50Cu43Al7 bulk metallic glass at 400-500oC
Authors: W. Kai;P.C. Lin;W.S. Chen;C.P. Chuang;P.K. Liaw;H.H. Huang;H.H. Hsieh
Contributors: NTOU:Institute of Materials Engineering
Keywords: B. XRD;B. SEM;B. TEM;C. Oxidation
Date: 2012-07
Issue Date: 2013-10-07T02:02:28Z
Publisher: Corrosion Science
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.
Relation: 64(November 2012), pp.98-104
Appears in Collections:[Institute of Materials Engineering] Periodical Articles

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