The mechanism of high temperature oxidation of a SmCo-based magnetic alloy
The mechanism of high temperature oxidation of a SmCo-based magnetic alloy
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DOI：
10.1016/j.corsci.2012.04.028
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发表时间：
2012-08-01
影响因子：
8.3
通讯作者：
Wang, F.
中科院分区：
文献类型：
--
作者：
Yang, Z.;Peng, X.;Wang, F.
研究了Sm(CobalFe0.22Cu0.08Zr0.02)(7.5)磁性合金在500、600和700℃空气中的氧化行为。温度升高极大地促进了外氧化和内氧化。外层由较薄的CuO外层和较厚的(Co-x，Fe1-x，)Fe2O4组成，内层分布有α-Fe2O3。氧化钐在氧化膜中看不到，但主要是内氧化产物。在较高温度下观察到剥离氧化现象。在详细分析了合金氧化区的成分和组织特征的基础上，提出了外氧化、内氧化和剥离氧化的机理。(C)2012爱思唯尔有限公司。保留所有权利。
The oxidation of a Sm(CobalFe0.22Cu0.08Zr0.02)(7.5) magnetic alloy in air at 500,600 and 700 degrees C has been studied. The temperature increase greatly promotes the external and internal oxidation. The external scale consists of a thin outer layer of CuO and a thicker inner layer of (Co-x, Fe1-x,)Fe2O4 with distribution of alpha-Fe2O3. Samarium oxide is not seen in the scale but it is mainly internal oxidation product. Breakaway oxidation is observed at higher temperatures. The mechanisms of external and internal oxidation as well as breakaway oxidation are presented, based on detailed compositional and microstructural characterization of the oxidized zone of the alloy. (C) 2012 Elsevier Ltd. All rights reserved.