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Hot-corrosion behavior of Ti3SiC2 in a eutectic mixture of LiCl-KCl salts in air

机译:Ti3sic2在空气中LiCl-Kcl盐的共晶混合物中的热腐蚀行为

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摘要

High-corrosion-resistant materials are required for the pyrochemical reprocessing of spent fuels. Towards this end, the hot-corrosion behavior of polycrystalline Ti3SiC2 in a eutectic mixture of LiCl-KCl melts was investigated for 100 h at 550 degrees C, 650 degrees C, and 750 degrees C in air. The results indicate that Ti3SiC2 exhibits excellent corrosion resistance in LiCl-KCl at 550 degrees C. However, it undergoes hotcorrosion at 650 degrees C and 750 degrees C, with the mass gains per unit area being approximately 0.4 and 1.6 mg cm(-2), respectively. The main corrosion products at 650 degrees C and 750 degrees C were found to be TiO2 and Li2TiO3, respectively. It was surmised that Ti3SiC2 exhibits good corrosion resistance at 550 degrees C and is partly corrosion resistant because the oxide products form a stable protective film on the specimen surface at 650 degrees C and 750 degrees C. Finally, the microstructures and phase compositions of the corroded samples were investigated using scanning electron microscopy/energy-dispersive X-ray spectroscopy and X-ray diffraction analysis.
机译:燃料燃料的热化学重新处理需要高耐腐蚀材料。朝向该目的,在550℃,650℃和750℃的空气中研究了LiCl-KCl熔体的共晶混合物中的多晶Ti3SIC2的热腐蚀行为。结果表明,Ti3SIC2在550℃下在LiCl-Kcl中表现出优异的耐腐蚀性。然而,它在650℃和750℃下进行热腐殖,每单位面积的质量增益约为0.4和1.6mg cm(-2) , 分别。发现650℃和750℃的主要腐蚀产物分别为TiO 2和Li2TiO3。它被抑制了Ti3SIC2在550℃下表现出良好的耐腐蚀性,并且是部分腐蚀性的,因为氧化物产物在650℃和750℃下在样品表面上形成稳定的保护膜。最后,腐蚀的微观结构和相组合物使用扫描电子显微镜/能量分散X射线光谱和X射线衍射分析来研究样品。

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  • 来源
    《RSC Advances》 |2015年第28期|共5页
  • 作者单位

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

    China Acad Engn Phys Inst Nucl Phys &

    Chem Mianyang 621999 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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