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利用气流喷砂型试验机 ,对 Si C和 Al2 O3颗粒增强的有机硅基复合材料涂层 (SMCC)的冲蚀磨损行为进行了研究 .发现合适的基体组成、增强体颗粒种类及含量使 SMCC冲蚀率较纯有机硅树脂涂层降低了 1个数量级 .冲蚀表面形貌 SEM分析表明 :低速冲蚀时涂层冲蚀磨损机理以显微犁耕为主 ,并伴有显微切削 ;而高速冲蚀时的磨损机理主要是微裂纹的产生和扩展造成涂层的大块剥落 ,并伴有微切削和微犁耕 .
The erosive wear behavior of SiC and Al 2 O 3 particles reinforced silicone-based composites coatings (SMCC) was studied by using an air blasting tester and found that a suitable matrix composition, increased body particle type and content enabled SMCC The erosion rate was reduced by one order of magnitude compared with the pure silicone resin coating.The SEM analysis of erosion surface morphology showed that the erosion and erosion mechanism of the coating was dominated by micro plowing and accompanied by micro-cutting. The wear mechanism of high-speed erosion is mainly due to the generation and expansion of microcracks, which cause the coating to peel off, accompanied by micro-cutting and micro-plowing.