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<p>In this work, two kinds of NiCrAlY coating with different porosities were prepared on the surface of 310S stainless steel using supersonic plasma spraying technology. The long-term field exposure test in the SOFC system revealed that the supersonic plasma-sprayed NiCrAlY coating exhibited excellent oxidation resistance in the SOFC environment containing O<sub>2</sub> and water vapor. The well-prepared coatings showed only slight interfacial oxidation after 10,000 h, indicating their potential as candidate materials in the SOFC system. The oxidation resistance and anti-stripping performance of the NiCrAlY coating in the SOFC environment is significantly influenced by the porosity of the coating. Coatings with higher porosity tend to form clusters of Cr- and Al-rich oxides in the coating, which led to interfacial delamination at the coating/substrate interface.</p>

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Long-Term Oxidation Behavior of Supersonic Plasma-Sprayed NiCrAlY Coatings in SOFC System

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Qinghu Ge,
  • Xuesong Shen,
  • Xianzeng Zhong,
  • Cuiwei Du,
  • Hongchi Ma,
  • Xiaogang Li

摘要

In this work, two kinds of NiCrAlY coating with different porosities were prepared on the surface of 310S stainless steel using supersonic plasma spraying technology. The long-term field exposure test in the SOFC system revealed that the supersonic plasma-sprayed NiCrAlY coating exhibited excellent oxidation resistance in the SOFC environment containing O2 and water vapor. The well-prepared coatings showed only slight interfacial oxidation after 10,000 h, indicating their potential as candidate materials in the SOFC system. The oxidation resistance and anti-stripping performance of the NiCrAlY coating in the SOFC environment is significantly influenced by the porosity of the coating. Coatings with higher porosity tend to form clusters of Cr- and Al-rich oxides in the coating, which led to interfacial delamination at the coating/substrate interface.