S. Ariharan, Milan Parchovianský, Pushpender Singh, Pooja Rani, Rita Maurya, Anusha Sekar, Anup Kumar Keshri, Amirhossein Pakseresht
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引用次数: 0
Abstract
La2Ce2O7 (LC) has been identified as a promising thermal barrier coating (TBC) for use up to 1250 °C. In this study, a TBC system was deposited on grit-blasted Inconel 738 using atmospheric plasma spraying (APS) with NiCrAlY as the bond coat, followed by YSZ, and then LC as the top layer. The coatings were exposed to a mixture of molten Na2SO4 (45 wt.%) and V2O5 (55 wt.%) at 950 °C for hot corrosion. On the top LC layer, LaVO4, CeVO4 and CeO(1.66–2.00) formed as hot corrosion products after 4 h exposure. A reaction between YSZ and the corrosion products could not be observed due to the absence of YVO4. The hot corrosion mechanism of the LC-based TBC is also discussed in this study.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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