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本文以扫描电镜(带X射线波长谱仪)为主要工具,对Fe-23Cr-6Al合金(不含稀土及加La,Ce和Y)1300℃高温氧化进行了研究.阐明了不含稀土合金氧化皮粘附性极差的根源,是部分向外扩散的阳离子留在氧化皮/基体界面处的空位聚集成空腔,使氧化皮和基体产生部分脱离的缘故.并认为添加稀土改变氧化皮的生长机制,是稀土改善Fe-Cr-Al合金高温氧化皮粘附性的主要原因.
In this paper, the scanning electron microscopy (with X-ray wavelength spectrometer) as the main tool for the Fe-23Cr-6Al alloy (rare earth and La, Ce and Y) 1300 ℃ high temperature oxidation was studied. The root cause of poor skin adhesion is that some of the outwardly diffused cations are trapped in the vacancies at the scale / matrix interface and become cavities, resulting in the partial detachment of scale from the matrix. It is also believed that the addition of rare earths Growth mechanism is the main reason for the rare earth to improve the adhesion of high temperature scale of Fe-Cr-Al alloy.