TiO2纳米管阵列/Ti基体的界面特征与失效机制

项目名称： TiO2纳米管阵列/Ti基体的界面特征与失效机制

项目编号： No.51274248

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 邹俭鹏

作者单位： 中南大学

项目金额： 80万元

中文摘要： 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。

中文关键词： TiO2纳米管；生长特性；界面结合机理；退火；界面失效行为

英文摘要： 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 co

英文关键词： TiO2 nanotube；growing characteristics；interfacial bonding mechanism；annealing；interfacial destroying behavior