热喷涂陶瓷涂层的耐磨应用及涂层结构调控方法

因涂层材料适用范围广、基材适应性强、工艺灵活等特点,热喷涂陶瓷涂层作为一类新型耐磨涂层已经在很多领域获得成功应用。然而,现代工业发展对耐苛刻条件下严酷磨损的高性能耐磨涂层提出了越来越高的需求,如何通过材料?工艺的整体技术体系进行涂层结构的有效调控,成为涂层技术领域的重要研究课题之一。本文在简要介绍热喷涂陶瓷涂层作为耐磨涂层应用现状的基础上,提取出对涂层耐磨性具有普遍意义的层内扁平粒子间界面结合这一重要的涂层结构本质特征,明确了涂层内扁平粒子间界面强化的基本思路,阐述了基于界面同质强化和界面异质强化的两条思路进行层间结合界面强化的研究进展,以期为面向更高耐磨性能的热喷涂陶瓷涂层的材料选择、结构设计以及工艺优化提供有益参考。

Thermally Sprayed Ceramic Coatings for Wear-Resistant Application and Coating Structure Tailoring Towards Advanced Wear-Resistant Coatings

Thermal spraying has been widely applied to prepare wear-resistant ceramic coatings due to its flexibility to coating materials, substrate materials and processing. However, with the development of modern industry, the wear-resistant performance of coatings is required to be further improved to fulfill the increasingly harsh wear condition. How to effectively tailor coating structure towards a high wear resistance becomes a key issue. In this paper, the application of thermally sprayed wear-resistant ceramic coatings was briefly summarized, and a most important structural factor, inter-lamellar bonding state, influencing the wear resistance was proposed in this paper. The methods to strengthen the inter-lamellar bonding via homogeneous interface strengthening and heterogeneous interface strengthening were discussed towards a higher wear-resistant performance based on the material selection, structure design and processing parameter optimization.