To protect Nb substrate from oxidation at elevated temperatures and make better use of the industrial solid wastes, spent MoSi heating elements, ZrSi and SiC were applied as raw materials to prepare MoSi and MoSi–ZrSi–SiC coatings by Spark Plasma Sintering (SPS). After high-temperature sintering, cracks were found in a single MoSi coating while MoSi–ZrSi–SiC coating was crack-free without any defects by the CTE mismatch reduction. Diffusion layers formed on the substrate and it strengthened the bonding in the coating system with good metallurgical combination. The oxide scale of the composite coatings possessed compact and crack-free morphologies with fractional consumption after oxidation at 1500 °C. Circular MoSi phases that possessed pores and cracks generated in the silica layer of MoSi coating at 1700 °C while MoSi–ZrSi–SiC composite coating still kept crack-free oxide scale, thus showing excellent 1700 °C anti-oxidation properties.

中文翻译：

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MoSi2基工业固体废物的回收用于MoSi2-ZrSi2-SiC复合涂层的制备和高温氧化行为

为了保护铌基体在高温下不被氧化，并更好地利用工业固体废物，以废MoSi加热元件、ZrSi和SiC为原料，通过火花等离子烧结（SPS）制备MoSi和MoSi-ZrSi-SiC涂层。高温烧结后，在单个 MoSi 涂层中发现裂纹，而 MoSi-ZrSi-SiC 涂层则无裂纹，因 CTE 失配降低而没有任何缺陷。在基体上形成扩散层，增强了涂层体系的结合力，具有良好的冶金结合。复合涂层的氧化皮具有致密、无裂纹的形貌，并且在1500 ℃氧化后消耗分数很小。在1700℃时，MoSi涂层的二氧化硅层中产生了具有孔隙和裂纹的圆形MoSi相，而MoSi-ZrSi-SiC复合涂层仍然保持无裂纹的氧化皮，从而表现出优异的1700℃抗氧化性能。