面向连铸结晶器铜板对防护涂层的结合强度、抗冲蚀磨损、抗高温氧化和耐腐蚀性能非常苛刻的需求，提出包含NiAl过渡层、NiAl-NiCr-Cr3C2复合梯度层、Ce(NO3)3自修复铝硅复合硅氧烷封孔处理层的新型HVOF多层梯度复合涂层的设计方法。研究复合涂层-基体界面、陶瓷-金属梯度喷涂层、无机-有机高分子封孔层微观结构和界面结构的生成规律，阐明复合涂层高结合强度、承载能力、断裂韧性、耐磨性等力学性能的本质；研究载荷与温度、腐蚀介质耦合作用下，自修复硅氧烷涂层-金属陶瓷梯度涂层/基体中各相晶体结构演变、界面原子扩散和重构规律，及其对摩擦磨损、腐蚀冲蚀的影响规律，探索复合涂层在荷温耦合作用下的跨尺度损伤机制及失效机理。研究成果将获得适宜于连铸结晶器铜板的复合梯度涂层的制备理论和制备工艺，对丰富表面工程和硬质防护涂层理论具有重要学术贡献，为解决相关行业难题提供理论和应用基础。

To meet the requirements of the protective coatings on mold copper plate for slab in continuous casting with the adhesion strength, erosion resistance, high temperature oxidation resistance and corrosion resistance, the design of a new HVOF multilayer gradient composite coating containing NiAl transition layer, NiAl-NiCr-Cr3C2 composite gradient layer and Ce(NO3)3 self-repairing Al-Si silicone sealing composite film was proposed. The research on the interfaces between coatings and substrates, ceramic-metal gradient spraying layers, microstructures and interface structures of inorganic-organic polymer sealing layer was used to clarify the nature of the composite coatings with the strong bonding strength, loading capacity, fracture toughness and other mechanical properties. To make clear the effects of structural evolution of each phase, diffusion and reconstruction of interface atoms on the friction and wear, erosion behavior and on the mechanism of muti-scale damage and failure mechanism of the composite coatings under both load and temperature, the research was carried out on the self-repairing silicone coating-metal ceramic gradient composite coating under the condition of load, temperature and the interaction of corrosion media. The results will obtain the suitable preparation theory and technology for composite gradient coating on mold copper plate, which will make a contribution to enrich the theory of surface engineer and hard protective coating and provide the base of the theory and application.