Suspension Plasma Spray (SPS) process was used for the deposition of cobalt-nickel oxide solid solutions as potential coatings for inert anodes in primary aluminum production. The effects of SPS process parameters (plasma power, standoff distance, gas mixture, and substrate temperature) on the structure and composition of coatings were investigated. X-ray diffraction measurements, coupled with Rietveld refinement analysis, and scanning electron microscope (SEM) coupled with energy-dispersive X-ray spectroscopy (EDX) analyses were performed. It was shown that substrate temperature is the single most important parameter affecting the nature of the coating, and that uniform, adherent and non-porous Co_xNi_1-xO coatings made of a single solid solution phase are obtained when the substrate temperature is above 950 °C. Metallic Ni is observed in coatings prepared at lower temperatures and, in that case, the composition of the solid solution phase deviates from that of the starting materials. This work also discusses possible causes for the formation of metallic nickel during spraying.

悬浮等离子喷涂（SPS）工艺用于沉积钴-镍氧化物固溶体，作为原铝生产中惰性阳极的潜在涂层。研究了SPS工艺参数（等离子功率，支座距离，气体混合物和基材温度）对涂层结构和成分的影响。进行了X射线衍射测量，Rietveld精细分析以及扫描电子显微镜（SEM）以及能量色散X射线光谱（EDX）分析。结果表明，基材温度是影响涂层性质的唯一最重要的参数，并且均匀，附着和无孔的Co _x Ni _1-x当基材温度高于950°C时，将获得由单一固溶体相制成的O涂层。在较低温度下制备的涂层中观察到金属镍，在这种情况下，固溶相的成分与起始原料的成分有所不同。这项工作还讨论了在喷涂过程中形成金属镍的可能原因。