| abstract |
[PROBLEMS] To manufacture a ceramic film by thermal spraying using ceramic powder, and in the case of using plasma spraying, the flame temperature becomes 15000 ° C to 30000 ° C. Further, in the conventional flame spraying, the flame temperature is increased from 2200 ° C. to 3400 ° C., and the powder is easily melted and sublimated and decomposed to form a transformed film and a composition whose composition is different from that of the sprayed powder. Provided is an inexpensive method for obtaining an excellent film having a function satisfying a requirement by thermal spraying at a low temperature. Unlike conventional flame spraying, after a gun combustion chamber, sprayed powder and combustion gas are sprayed from a supply nozzle toward the axis of the flame, and the combustion gas and slurry sprayed fine powder are injected into the combustion chamber. The amount of oxygen and the volume of the combustion gas introduced from the supply nozzle are adjusted to control the temperature of the ceramic fine powder present in the frame, and the coating is accelerated by the combustion product gas to have the required functional characteristics and adhesion. It is formed. [Selection figure] None |