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热喷涂层由扁平粒子组成，呈层状结构。气孔不可避免地存在于涂层中，而这些气孔包括通常所指的微米级气孔以及亚微米级的气孔。亚微米级气孔由扁平粒子间的未结合界面和扁平陶瓷粒子内所产生的显微裂纹构成。业已开发成功陶瓷涂层的电镀技术，并利用电镀的钢在涂层断面上的分布，揭示热喷涂Al2O3涂层的的真实气孔结构的方法。该方法的最重要之处在于直观地揭示热喷涂层的扁平陶瓷粒子间的未结合界面。本论文将电镀技术应用于传统的等离子、低气压等离子以及爆炸喷涂法喷制的Al2O3涂层，用扁平粒子间平均结合率和扁平粒子的平均厚度为结构参数定量地评价涂层结构。考察热喷涂方法对扁平粒子间结合的影响。
The thermal sprayed layer consists of flat particles in the form of a layered structure. Stomata are inevitably present in the coating, and these stomata include commonly referred to as micron-scale pores and submicron-sized pores. Submicron pores are composed of unbonded interfaces between flat particles and microcracks generated in the flat ceramic particles. Successful electroplating techniques have been developed for ceramic coatings, and the distribution of electroplated steel on the cross-section of the coating has been exploited to reveal the true pore structure of thermally sprayed Al2O3 coatings. The most important point of this method is to visually reveal the unbonded interface between the flat ceramic particles of the thermal sprayed layer. In this dissertation, electroplating technology was applied to Al2O3 plasma sprayed by plasma, low pressure plasma and explosive spray method. The average particle size of flat particles and the average bond of flat particles were selected as the structural parameters to evaluate the coating structure quantitatively. The effect of thermal spraying method on the interparticle bonding was investigated.