热喷涂涂层孔隙结构表征研究进展

Progress of Pore Structure Characterization of Thermal Sprayed Coatings

摘要:

孔隙在热喷涂制备的涂层中较为常见,孔隙的形貌、大小、分布特征等对涂层的性能有着重要影响。因此,对热喷涂涂层孔隙结构特征的表征显得尤为重要。本文对热喷涂涂层孔隙结构的表征方法进行了综合评述,常用的图像分析法包括通过光学显微镜、扫描电子显微镜、透射电子显微镜组织图像中的孔隙结构特征进行分析,浸渗压入法,气体吸附与解吸附,原子力探针接触式测量,射线三维扫描成像(X射线、中子射线等),超声波成像分析等。分析比较了各类方法的优缺点以及适用范围等,并对热喷涂涂层孔隙结构表征技术的发展进行了展望。

Abstract:

The pores existed commonly in the thermal sprayed coatings. The pore morphology, size and distribution took great effects on the performance of coatings. Therefore, it is very important to characterize pore structures of thermal sprayed coatings. In this work, the characterization means of thermal sprayed coatings’ pore structure were comprehensively reviewed. The often-used image analysis means of pore structure characterization included optical microscope, scanning electrical microscope and transmission electron microscope. Besides these, there were infiltration compression method, gas adsorption and desorption, contact measurement of atomic force probe, 3D ray scanning imaging including X-ray and neutron ray, ultrasonic imaging analysis, and so. The advantage and disadvantage of all kinds of pore characterization means were discussed. The application scopes of each mean were analyzed. The future characterization technology of thermal sprayed pore structure was prospected.