环氧树脂及其复合材料的固体颗粒冲蚀磨损

Solid Particle Erosive Wear of Epoxy and Its Composites

摘要:

针对戈壁风沙流环境特点，采用气流挟砂喷射法, 对环氧树脂及其复合材料进行冲蚀试验，研究了冲蚀速率、角度、冲蚀方位、纤维类型等对冲蚀的影响.结果表明：环氧树脂及其复合材料的冲蚀行为表现出半塑性材料的冲蚀特征，最大冲蚀率的冲蚀角为45°～60°，其冲蚀率随冲蚀速率的增加而增大，冲蚀率与冲蚀速率呈指数关系，速率指数为2.1～2.8.冲蚀方位对冲蚀有重要的影响，在相同的冲蚀条件下，垂直冲蚀的冲蚀率比平行冲蚀高.用扫描电子显微镜观察了复合材料冲蚀后的表面形貌，并讨论了可能的冲蚀机制.

Abstract:

Based on the characteristics of Gobi wind sand flow environment, the erosive wear tests of epoxy and its composites were carried out by sediment air injection method to investigate the effects of wind sand flow velocity, impingement angles, impacting orientation and fiber type on the erosion rate of epoxy and its composite. Results show that epoxy and its composites show semi ductile erosion behaviour, with peak erosion rate at 45°60° impingement angle. Erosion rate increases with increasing of wind sand flow velocity. Exponential relationship is observed with wind sand flow velocity, and the velocity index is 2.12.8. The impacting orientations have a significant influence on erosion, under the same condition, the erosion rate of perpendicular impacting is higher than that of parallel erosion. The morphology of eroded surfaces was examined by using scanning electron microscopy（SEM）. Possible erosion mechanisms are discussed.