关键词: 固体推进剂火箭发动机;耐热涂层;热防护;烧蚀

Abstract: research in formulation design,heating calculation,coating preparation and examining test for thermal protection of the common dome and ring ignitor is presented. An advanced 3500K high temperature coating is first used in a powerplant,which is made of epoxy organosilicon resin substrate, special resin curing system and multi-shape silicate filler. The performances of the coating in high temperature resisting, thermal insulating and ablation resisting are excellant. Also, the coating can be cured and shaped at a room temperature. It solves successfully the difficult problems of thermal protection and overablation for the parts which have large dimension, thin wall and complex geometric shape in the medium solid rocket motor,and increases effectively the operating reliability of motors.

Key words: Solid propellant rocket engine;Heat resistant coating;Thermal protection;Ablation