The oxidation behavior of several Ti-Al alloys at 900°C in air
The oxidation behavior of several Ti-Al alloys at 900°C in air
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DOI：
10.1023/a:1018839511102
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发表时间：
1999-10-01
影响因子：
2.2
通讯作者：
Schütze, M
中科院分区：
文献类型：
--
作者：
Schmitz-Niederau, M;Schütze, M
Ti-23Al;Ti-50Al和Ti-50Al- 2nb （at.%）在900℃的空气中氧化1130小时。通过金相和显微观察对氧化皮的结构进行了详细分析，发现复合氧化皮中Al2O3的结构与热重曲线的走向有关。由此可见，为了实现水垢的长期保护行为，有必要在水垢-金属界面处刺激形成一层薄薄的Al2O3屏障，而不是在水垢的外部位置。Nb效应似乎主要是由于界面处的Al2O3层的刺激。
Ti-23Al; Ti-50Al and Ti-50Al-2Nb (at.%) were oxidized in air at 900 degrees C for times up to 1130 hr. The resulting oxide scale structures were analyzed in great detail by metallographic and microprobe investigations and the Al2O3 structures in the complex oxide scales were correlated with the course of the thermogravimetric curves. It appears that in order to achieve long-term protective behavior of the scales, it is necessary to stimulate the formation of a thin Al2O3 barrier at the scale-metal interface and not at a position in the outer part of the scale. The Nb effect seems to be mostly due to this stimulation of an Al2O3 layer at the interface.