表面涂Na2SO4盐膜的改性Ti3Al基合金在910和950°C空气中的热腐蚀行为

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Bibliographic Details
Published in	中国有色金属学报：英文版 Vol. 27; no. 4; pp. 954 - 961
Main Author	钱余海;李希超;李美栓;徐敬军;卢斌
Format	Journal Article
Language	English
Published	2017
Subjects	改性Ti3Al基金属间化合物;热腐蚀;腐蚀产物瘤;Na2SO4盐膜
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ISSN	1003-6326

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Bibliography:	modified Ti3Al-based intermetallics; hot corrosion; corrosion product nodule; Na2SO4 melt 43-1239/TG The hot corrosion behaviour of a modified Ti3Al-based alloy under thin Na2SO4deposit film was investigated at910and950°C in air.The corrosion product was identified by XRD and its morphologies on the surface and cross-section were observed bySEM.The alloy suffered from considerable hot corrosion attack.The mass gain versus time curves obtained by TGA exhibited tworegions of different kinetics.The whole corroded layer consisted of loose and porous mixture oxides of TiO2,Nb2O5and Al2O3.Numerous small nodules of corrosion product were observed.An illustrative schematic was established to describe the formationprocess of such nodules.It seemed that the refractory oxides played a significantly important role in determining the development ofhot corrosion attack.
ISSN:	1003-6326