Improving the High-Temperature Oxidation Resistance of TiAl Alloy by Anodizing in Methanol/NaF Solution
Improving the High-Temperature Oxidation Resistance of TiAl Alloy by Anodizing in Methanol/NaF Solution
复制标题
甲醇/NaF溶液阳极氧化提高TiAl合金的高温抗氧化性能
DOI：
10.1007/s11085-018-9858-1
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发表时间：
2018-07
影响因子：
2.2
通讯作者：
Zheng Guo-Qu
中科院分区：
文献类型：
--
作者：
Wu Lian-Kui;Xia Jun-Jie;Cao Hua-Zhen;Liu Wen-Juan;Hou Guang-Ya;Tang Yi-Ping;Zheng Guo-Qu
在含NaF的甲醇溶液中，采用阳极氧化法在TiAl合金表面制备了富铝富氟阳极氧化膜。研究了钛铝合金阳极氧化膜的抗高温氧化性能及保护机理。结果表明，富铝氧化膜的形成源于卤素效应，较小的阳极氧化电流密度是提高高温抗氧化性能的必要条件。在850 °C下氧化100 h后，在阳极化的TiAl合金上没有显示出裂纹和/或剥落。XPS分析表明，当温度高于300 °C时，氟化钛发生升华，氟化铝转化为Al 2 O3保护层。该新生成的Al 2 O3层与阳极氧化形成的Al 2 O3层一起，可以有效地抑制Al的向外扩散和氧的向内扩散，从而提高TiAl的高温抗氧化性。
An aluminum- and fluorine-enriched anodic film was fabricated on TiAl alloy by anodizing in NaF-contained methanol solution. The high-temperature oxidation resistance and protection mechanism of the anodized TiAl alloy were investigated. It showed that the formation of aluminum-enriched oxide scale originates from halogen effect and quite small anodization current density is essential to improving the high-temperature oxidation resistance. Upon oxidation at 850 °C for 100 h, no cracks and/or spallation were exhibited on the anodized TiAl alloy. At temperature higher than 300 °C, titanium fluoride will sublimate, accompanying with the transformation of aluminum fluoride into protective Al2O3layer, as was indicated by XPS analysis. This freshly generated Al2O3layer, together with the anodization formed one, can efficiently inhibit the outward diffusion of Al and inward diffusion of oxygen, thereby improving the high-temperature oxidation resistance of the TiAl.
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影响因子：
2.2
作者：
Schmitz-Niederau, M;Schütze, M
通讯作者：
Schütze, M
影响因子：
4.4
作者：
A. Donchev;E. Richter;M. Schütze;R. Yankov
通讯作者：
A. Donchev;E. Richter;M. Schütze;R. Yankov
影响因子：
8.3
作者：
S. Friedle;N. Laska;R. Braun;H. Zschau;M. Galetz;M. Schütze
通讯作者：
S. Friedle;N. Laska;R. Braun;H. Zschau;M. Galetz;M. Schütze
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影响因子：
8.3
作者：
Lian-Kui Wu;Wei-Yao Wu;Jia-Lin Song;Guang-Ya Hou;Hua-Zhen Cao;Yi-Ping Tang;Guo-Qu Zheng
通讯作者：
Guo-Qu Zheng
影响因子：
5.4
作者：
M. Mo;Lian-Kui Wu;Huazhen Cao;Junpin Lin;D. Lu;G. Zheng
通讯作者：
M. Mo;Lian-Kui Wu;Huazhen Cao;Junpin Lin;D. Lu;G. Zheng