实体膨胀管内涂层研究

On internal coating of solid expansion tubes

实体膨胀管内涂层的研究开发，是实体膨胀管膨胀成功与否的关键技术之一。利用石墨、双马来酰亚胺、酚醛改性环氧树脂研制的内涂层具有耐高温、减摩的效果。在给定的试验条件下，填充石墨能够有效地改善这种内涂层的摩擦性能，石墨填充量在40％～50％之间时，复合材料的摩擦学性能较好。该内涂层在其应用的环境温度（室温至150℃）下，具有良好的摩擦学性能，内涂层的寿命完全满足一次性使用的要求。

Research and development of internal coating of solid expansion tubes are one of the major techniques for the successful expansion of the solid expansion tubes, the internal coating made by graphite, bismaleimides and novalac epoxy has the effect of high temperature resistance and friction reduction. Under the given conditions, graphite packing can effectively improve the friction performance of the internal coating, when its packing volume is between 40%-50%, good frictional performance of composite materials is obtained, under operation ambient temperature (150℃), better frictional performance can be achieved. It indicates that the coating usage life can meet the requirements of single use.