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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23512

Title: Oxidation Behavior of a Pd43Cu27Ni10P20 Bulk Metallic Glass and Foam in Dry Air
Authors: W. Kai;I.F. Ren;B. Barnard;P.K. Liaw;M.D. Demetriou;W.L. Johnson
Contributors: NTOU:Institute of Materials Engineering
國立臺灣海洋大學:材料工程研究所
Date: 2010-07-01
Issue Date: 2011-10-20T08:06:28Z
Publisher: Metallurgical and Materials Transactions A
Abstract: Abstract:The oxidation behavior of both Pd43Cu27Ni10P20 bulk metallic glass (Pd4-BMG) and its amorphous foam containing 45 pct porosity (Pd4-AF) was investigated over the temperature range of 343 K (70 °C) to 623 K (350 °C) in dry air. The results showed that virtually no oxidation occurred in the Pd4-BMG at T < 523 K (250 °C), revealing the alloy’s favorable oxidation resistance in this temperature range. In addition, the oxidation kinetics at T ≥ 523 K (250 °C) followed a parabolic-rate law, and the parabolic-rate constants (k p values) generally increased with temperature. It was found that the oxidation k p values of the Pd4-AF are slightly lower than those of the Pd4-BMG, indicating that the porous structure contributes to improving the overall oxidation resistance. The scale formed on the alloys was composed exclusively of CuO at T ≥ 548 K (275 °C), whose thickness gradually increased with increasing temperature. In addition, the amorphous structure remained unchanged at T ≤ 548 K (275 °C), while a triplex-phase structure developed after the oxidation at higher temperatures, consisting of Pd2Ni2P, Cu3P, and Pd3P.
Relation: 41(7), pp.1720-1725
URI: http://ntour.ntou.edu.tw/handle/987654321/23512
Appears in Collections:[材料工程研究所] 期刊論文

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