Role of bond coat deposition method in the hot corrosion behavior of CSZ thermal barrier coatings

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Emerging Materials Research Pub Date : 2023-11-07 DOI:10.1680/jemmr.22.00187

Babak Mousavi, Mohammad Farvizi, Ali Shamsipoor, Mohammad Reza Rahimipour, Ahmad Keyvani

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引用次数: 0

Abstract

In this research, a NiCrAlY bond coat was applied using two methods – namely, conventional air plasma spraying (APS) and new spark plasma sintering (SPS) technique – on an Inconel-738 substrate. The ceria-stabilized zirconia (CSZ) topcoat was similar in both samples and deposited using the APS method. The hot corrosion performance of the fabricated thermal barrier coatings (TBCs) was studied at 950°C in a sodium sulfate (Na₂SO₄)–55 wt.% vanadium (V) oxide (V₂O₅) corrosive salt environment. The results showed that the hot corrosion resistance of the coating system with an SPS-processed NiCrAlY bond coat and a CSZ topcoat was much better than that of the conventional TBC sample because the adhesion of the bond coat to the substrate was very good in this sample, and the interface was free of any defects such as cracks and porosities. According to these results, no spallation was observed in the SPS-processed coating up to 38 h, while for the CSZ topcoat with an APS-processed bond coat, spallation occurred after 24 h.

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粘结层沉积方法在CSZ热障涂层热腐蚀行为中的作用

在这项研究中，NiCrAlY结合涂层采用两种方法-即传统的空气等离子喷涂(APS)和新的火花等离子烧结(SPS)技术-在Inconel-738基板上。两种样品的铈稳定氧化锆(CSZ)面漆相似，采用APS法沉积。在硫酸钠(Na2SO4) -55 wt.%钒(V)氧化物(V2O5)腐蚀盐环境中，在950℃下研究了制备的热障涂层(tbc)的热腐蚀性能。结果表明:sps处理NiCrAlY结合层和CSZ面涂层的涂层体系的耐热腐蚀性能明显优于常规TBC样品，因为该样品中结合层与基体的附着力非常好，并且界面没有任何裂纹和孔隙等缺陷。根据这些结果，sps处理的面漆在38 h内没有出现剥落现象，而带有aps处理的粘结层的CSZ面漆在24 h后就出现了剥落现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Emerging Materials Research MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

9.10%

发文量

期刊介绍： Materials Research is constantly evolving and correlations between process, structure, properties and performance which are application specific require expert understanding at the macro-, micro- and nano-scale. The ability to intelligently manipulate material properties and tailor them for desired applications is of constant interest and challenge within universities, national labs and industry.