本课题拟进行TiO2纳米管阵列/Ti基体的界面结构、界面性能、界面结合机理、失效机制及热处理影响的研究。首先阐明TiO2纳米管长度、直径、壁厚及密度分布等生长特性与界面厚度、相结构、扩散层等界面结构的内在关系；其次测量与评价不同热处理条件下残余应力、界面剪切强度、能量释放率、断裂韧性等界面性能并形成与热处理参数间的定量关系，构建热处理对TiO2纳米管阵列界面性能的影响规律，提出热处理影响界面性能的物理机制；然后根据弯曲梁应力分布理论并结合有限元分析，提出TiO2纳米管阵列的界面结合机理；最后通过横向拉伸法，结合界面剪滞力学模型，建立TiO2纳米管阵列基于裂纹的失效机制，并将屈曲、脱层、裂纹与应变的关系相关联，提出基于屈曲和脱层的失效机制。旨在掌握TiO2纳米管阵列的界面基础理论和失效机制，为TiO2纳米管阵列制备技术的改良与实际应用提供理论依据。

In this project, the interfacial structure, interfacial properties, interfacial bonding mechanism, failure mechansim and annealing effects of TiO2 nanotube array will be studied. .Firstly, the relationship of growing characteristics including length, diameter, wall thickness and density distribution of TiO2 nanotube array to the interfacial structure will be elucidated. The interfacial structure consists of interface thickness, phase structure and diffusion layer. .Secondly, the interfacial properties including residual stress, interfacial shear strength, energy release rate, and fracture toughness under different conditions will be evaluated. The quantitative relationship between annealing parameters and interfacial properties will be given. The influencing rule of annealing to the interfacial properties of TiO2 nanotube array will be established. Moreover, physical mechanism of annealing influence to the interfacial properties will be raised..Thirdly, the interfacial bonding mechanism of TiO2 nanotube array/Ti substrate will be proposed according to the finite element analysis and stress distribution theory of bending beam..Fourthly, the failure mechanism of TiO2 nanotube array from crack consideration will be raised based on the transverse tensile test method and interfacial shear-lag model.On the basis of correlation among crack, buckling, debonding and tensile strain, the failure mechanism from buckling and debonding consideration will be presented..The purpose of this project is to achieve the interfacial fundamental theories and failure mechanism and to provide theoretical basis of fabricating technology and practical applications of TiO2 nanotube array.