Oxidation behaviour of a fluorinated beta-stabilized γ-TiAl alloy with thermal barrier coatings in H2O- and SO2-containing atmospheres

被引：24

作者：

Friedle, Simone ^{[1
]}

Laska, Nadine ^{[2
]}

Braun, Reinhold ^{[2
]}

Zschau, Hans-Eberhard ^{[1
]}

Galetz, Mathias C. ^{[1
]}

Schuetze, Michael ^{[1
]}

机构：

[1] DECHEMA Forschungs Inst, D-60486 Frankfurt, Germany

[2] Inst Mat Res, German Aerosp Ctr, DLR, D-51170 Cologne, Germany

来源：

CORROSION SCIENCE | 2015年 / 92卷

关键词：

Intermetallics; Thermal cycling; Oxidation; RESISTANCE;

D O I：

10.1016/j.corsci.2014.11.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behaviour of a novel thermal barrier coating (TBC) system on a beta-stabilized TiAl alloy was investigated at 900 degrees 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 degrees 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. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：280 / 286

页数：7

共 15 条

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