Abstract
The present study was conducted to evaluate and compare oxidation behavior of nanostructured and conventional MoSi2 plasma-sprayed coatings. For this purpose, the synthesized and conventional MoSi2 powders were deposited by argon-shrouded plasma spraying (ASPS). The results showed that the nanostructured coat consisted of nanoparticles of solid or semisolid state entrapped in a typical splat morphology. The nanostructured coat showed a high concentration of non-transformed α-MoSi2 phase. The formation of a continuous SiO2 layer revealed a protective effect of plasma-sprayed coatings at a high temperature of 1000 ℃. The adhesion strength, hardness, and roughness of nanostructured and conventional MoSi2 coatings were also determined in this work.
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