脉冲电子束与喷砂复合处理对MCrAlY涂层表面粗糙度及结合强度的影响

发布时间：2018-03-25 22:30

本文选题：强流脉冲电子束　切入点：喷砂处理　出处：《焊接学报》2015年04期

【摘要】：采用强流脉冲电子束(high-current pulsed electron beam,HCPEB)技术与喷砂技术对MCr Al Y金属粘结层表面进行复合处理,考察处理前后MCr Al Y涂层形貌和表面粗糙度的变化及其对粘结层与YSZ陶瓷层之间结合强度的影响.结果表明,HCPEB轰击处理后,涂层表面发生重熔,形成大量的连续起伏的胞状凸起结构,重熔层组织较为致密.HCPEB与喷砂复合处理后,凸起结构最表层发生粗化,涂层表面形成大量的连续均匀的锯齿状凹凸点,进而使涂层表面进一步粗化,表面粗糙度增加.拉伸试验结果显示,经过复合处理的MCr Al Y涂层与YSZ陶瓷层之间的结合强度明显提高.HCPEB与喷砂复合技术不仅强化了陶瓷面层与粘结层之间的结合,同样也保证了涂层界面的完整性及均匀性.
[Abstract]:High current pulsed electron beam-HCPEB) and sand blasting were used to compound the surface of MCr Al Y metal bond layer. The change of morphology and surface roughness of MCr Al Y coating before and after treatment and its influence on the bonding strength between bonding layer and YSZ ceramic layer were investigated. The results showed that the surface of MCr Al Y coating remelted after bombardment. A large number of continuous undulating cellular protrusions were formed, and the microstructure of the remelting layer was relatively compact. HCPEB and sand blasting combined treatment, the surface of the bulge structure was coarser, and a large number of continuous uniform serrated concave and convex spots were formed on the coating surface. Further coarsening the coating surface and increasing the surface roughness. The tensile test results show that, The bonding strength between the MCr Al Y coating and the YSZ ceramic layer is improved obviously. The bonding between the ceramic surface layer and the bonding layer is strengthened, and the integrity and uniformity of the coating interface are also ensured.
【作者单位】：中国民航大学天津市民用航空器试航与维修重点实验室;江苏大学材料科学与工程学院;
【基金】：中央高校基金资助项目(ZXB2011A005)
【分类号】：TG174.4

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