Deng Wen, Hou Guoliang, Li Shuangjian, Han Jiesheng, Zhao Xiaoqin, Liu Xia, An Yulong, Zhou Huidi, Chen Jianmin
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Ultrason Sonochem. 2018 Jun;44:115-119. doi: 10.1016/j.ultsonch.2018.02.018. Epub 2018 Feb 9.
A simple, scalable and economical method was proposed to obtain ceramic-organic composite coating with excellent comprehensive properties include hardness, toughness, elastic recovery, lamellar interfacial bonding and anti-cavitation erosion: introducing epoxy resin into the pores and micro-cracks of plasma sprayed ceramic coating. The results indicate that the epoxy resin was successfully penetrated into the whole ceramic coating and filled almost all defects by vacuum impregnation, which greatly enhanced its compactness and mechanical properties. The bonding strength between top coating and metal interlayer significantly increased from 17.3 MPa to 53.0 MPa, and the hardness (H) of top coating greatly increased from 11.07 GPa to 23.57 GPa. Besides, the value of H/E also increased from 0.06 GPa to 0.15 GPa, meaning the toughness of ceramic coating had been obviously improved. The pure ceramic coating had been punctured only after 4 h of cavitation test. However, the resin with high elasticity and toughness can effectively absorb impact energy, prevent cracks propagation and delay splats spallation during the cavitation erosion process. The novel composite coating displayed far better cavitation erosion resistance than pure ceramic coating, and it was still intact after 10 h of test.
提出了一种简单、可扩展且经济的方法来获得具有优异综合性能（包括硬度、韧性、弹性恢复、层状界面结合和抗空蚀性能）的陶瓷-有机复合涂层：将环氧树脂引入等离子喷涂陶瓷涂层的孔隙和微裂纹中。结果表明，通过真空浸渍，环氧树脂成功渗透到整个陶瓷涂层中并填充了几乎所有缺陷，这大大提高了其致密性和机械性能。面涂层与金属中间层之间的结合强度从17.3MPa显著提高到53.0MPa，面涂层的硬度（H）从11.07GPa大幅提高到23.57GPa。此外，H/E值也从0.06GPa增加到0.15GPa，这意味着陶瓷涂层的韧性得到了明显改善。纯陶瓷涂层在空蚀试验仅4小时后就被刺穿。然而，具有高弹性和韧性的树脂能够有效吸收冲击能量，防止裂纹扩展，并在空蚀过程中延迟薄片剥落。这种新型复合涂层表现出比纯陶瓷涂层更好的抗空蚀性能，在试验10小时后仍然完好无损。
