Investigation of the oxidation of plasma sprayed silicon coating

The quality of plasma sprayed silicon coating determined by density and spreading condition lamella greatly influences its performance. oxidation deteriorates However, the investigators mostly focus on mechanism amorphous silicon, porous specific crystal planes single crystal. factors which influence has never be studied. helium secondary gas flow more than other spraying parameters. So, we prepare technology with different flow. relationship between coating's is investigated. Furthermore, discussed. We find that an adverse effect degree coating. With decrease flow, both oxygen content coatings increase. Besides, atoms heterogeneously concentrate at outermost layer lamellas. Components enrichment area (OEA) from outside to inside are Si + SiOx SiO2→Si Si2O SiOx→Si (1<x < 1.5). width OEA in lamellas top about 180 nm, obviously thicker inner results obtained research can provide support better understand behavior service process.