National Tsing Hua University Institutional Repository:Air oxidation of an Fe72B22Y6 bulk amorphous alloy at 600-700 degrees C
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    National Tsing Hua University Institutional Repository > 工學院  > 材料科學工程學系 > 期刊論文 >  Air oxidation of an Fe72B22Y6 bulk amorphous alloy at 600-700 degrees C


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    題名: Air oxidation of an Fe72B22Y6 bulk amorphous alloy at 600-700 degrees C
    作者: Hsieh HH;Kai W;Huang RT;Lin CY;Chin TS
    教師: 金重勳
    日期: 2006
    出版者: Elsevier
    關聯: INTERMETALLICS,Volume: 14,Issue: 8-9,Special Issue: Sp. Iss. SI,Pages: 917-923,Published: AUG-SEP 2006
    關鍵詞: MAGNETIC-PROPERTIES
    GLASS
    摘要: The oxidation behavior of the Fe72B22Y6 bulk metallic glass and its crystalline counterpart was studied over the temperature range of 600-700 degrees C in dry air. The results showed that the oxidation kinetics of both glassy and crystalline alloys in general follow a parabolic rate law although a two-stage kinetics was noted at 700 C for the glassy alloy. The oxidation rates of the two alloys increased with increasing temperature, and the parabolic rate constants of the glassy alloy are much lower than those of the crystalline counterpart. The scales formed on the glassy alloy consisted mainly of boron oxide (B2O3) and minor amounts of iron oxides (Fe3O4/FeO). Conversely, duplex scales formed on the crystalline counterpart were composed of an outer layer of Fe2O3 and an inner layer of Fe3O4-YBO3 mixture. The formation of B2O3 is responsible for the reduced oxidation rates of the glassy alloy as compared to those of crystalline counterpart. (c) 2006 Elsevier Ltd. All rights reserved.
    URI: http://www.elsevier.com/wps/find/homepage.cws_home
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/53226
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