Oxidation behaviour of a fluorinated beta-stabilized γ-TiAl alloy with thermal barrier coatings in H2O- and SO2-containing atmospheres
Oxidation behaviour of a fluorinated beta-stabilized γ-TiAl alloy with thermal barrier coatings in H2O- and SO2-containing atmospheres
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DOI：
10.1016/j.corsci.2014.11.045
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发表时间：
2015-03
影响因子：
8.3
通讯作者：
S. Friedle;N. Laska;R. Braun;H. Zschau;M. Galetz;M. Schütze
中科院分区：
文献类型：
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作者：
S. Friedle;N. Laska;R. Braun;H. Zschau;M. Galetz;M. Schütze
研究了β稳定TiAl合金表面新型热障涂层（TBC）在900 °C含水蒸气和二氧化硫的空气中的氧化行为。这种最近开发的体系由7重量%的聚乙烯醇组成。氧化钇部分稳定的氧化锆顶涂层沉积在氟处理和预氧化的TNM-B1基底材料上。在900 °C的热循环过程中，在含有10体积% H2O或0.5体积% SO2，对于超过1000个循环的1 h停留时间，未观察到TBC的飞溅。没有TBC的氟化样品显示出类似的氧化行为，而未处理的TNM-B1合金显示出显著的氧化。
The oxidation behaviour of a novel thermal barrier coating (TBC) system on a β-stabilized TiAl alloy was investigated at 900 °C in air containing water vapour and sulphur dioxide. This recently developed system consists of a 7 wt.% yttria partially stabilized zirconia topcoat deposited on fluorine-treated and pre-oxidized TNM-B1 substrate material. During thermal cycling at 900 °C in atmospheres containing either 10 vol.% H2O or 0.5 vol.% SO2, no spallation of the TBCs was observed for exposure periods exceeding 1000 cycles of 1 h dwell time. Fluorinated samples without TBCs showed similar oxidation behaviour, whereas the untreated TNM-B1 alloy revealed significant oxidation.