Formation of Al2O3 Scales on Single-Phase RuAl Produced by Reactive Sintering
Formation of Al2O3 Scales on Single-Phase RuAl Produced by Reactive Sintering
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反应烧结单相 RuAl 上 Al2O3 氧化皮的形成
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
F. Mücklich
中科院分区：
文献类型：
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作者：
F. Soldera;N. Ilić;S. Brännström;I. Barrientos;H. Gobran;F. Mücklich
研究了粉末冶金与电弧熔炼相结合制备的单相RuAl合金的氧化行为。在1000°C下进行氧化;使用扫描电子显微镜（SEM）和X射线衍射（XRD）研究氧化物皮生长和相形成。在氧化过程中形成了一个致密的保护层与铝耗尽的子层。氧化膜为稳定的α-Al 2 O3。氧化皮形态显示存在针状晶须，表明氧化皮的生长是由Al向外扩散产生的。开始时，氧化遵循抛物线规律，但经过100小时的氧化;生长速度比抛物线规律预期的要慢。
The oxidation behavior of single-phase RuAl produced by powder metallurgy combined with arc melting was investigated. Oxidation was conducted at 1000°C; oxide scale growth and phase formation were studied using scanning-electron microscopy (SEM) and x-ray diffraction (XRD). A dense protective scale with an Al–depleted sublayer was formed during oxidation. The oxide scale is the stable α-Al2O3. The oxide-scale morphology shows the presence of whiskers, with a needle-like form, which suggests that the growth of the oxide scale is produced by outward diffusion of Al. At the beginning, oxidation follows a parabolic law, but, after 100 hr of oxidation; the growth rate is slower than expected from a parabolic law.