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Ti-22Al-26Nb合金的高溫氧化行為
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遼寧省高等學校科學研究項目（05L 342）和沈陽化工學院博士科研啟動基金(200603206)


Oxidation Behavior of Ti-22Al-26Nb Alloy at High Temperatures
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    摘要:

    采用熱重法研究Ti-22Al-26Nb合金在800和900 ℃的高溫氧化行為。利用X射線衍射分析(XRD)、掃描電鏡(SEM)對氧化膜的相組成和形貌進行分析。結果表明：在氧化初期該合金遵循拋物線規(guī)律，而20 h以后，合金的氧化動力學符合直線規(guī)律。氧化后的產(chǎn)物主要由TiO2、AlNbO4和Nb2TiO7組成，氧化膜出現(xiàn)了分層結構且氧化溫度愈高，分層愈明顯。

    Abstract:

    High-temperature oxidation behavior of Ti-22Al-26Nb alloy was studied by thermogravimetry at 800 and 900℃. X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) were employed to characterize the phase composition and morphology of oxide films. Results show that the oxidation of the alloy was parabolic at the transient stage, while it was approximately linear from 20 h to the end of the oxidation. Oxides mainly composed of TiO2, AlNbO4 and Nb2TiO7, and the oxide scale was stratified, which became more obvious with oxidation temperature increasing.

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張學軍,趙書彥,高春香,王 蕾,王淑菊,張 英. Ti-22Al-26Nb合金的高溫氧化行為[J].稀有金屬材料與工程,2009,38(12):2183~2186.[Zhang Xuejun, Zhao Shuyan, Gao Chunxiang, Wang Lei, Wang Shuju, Zhang Ying. Oxidation Behavior of Ti-22Al-26Nb Alloy at High Temperatures[J]. Rare Metal Materials and Engineering,2009,38(12):2183~2186.]
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  • 收稿日期:2008-11-25
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