微弧氧化陶瓷层的断裂行为研究

项目名称： 微弧氧化陶瓷层的断裂行为研究

项目编号： No.51301047

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 高成

作者单位： 桂林电子科技大学

项目金额： 25万元

中文摘要： 微弧氧化陶瓷化技术广泛应用于提高轻金属机械构件的表面性能领域，陶瓷层与基体的结合强度成为评价陶瓷层适用性的重要指标。在摩擦和热震环境下，陶瓷层局部会发生断裂和剥离，其根本原因是陶瓷层与基体的材料属性差异大和界面处应力集中导致的裂纹扩展。申请人在前期研究的基础上，提出通过设计陶瓷层/基体界面的晶相和结构，提高陶瓷层与基体的结合强度，并通过有限元方法模拟研究微弧氧化陶瓷层的断裂行为，为优化陶瓷层制备工艺提供理论依据。课题拟进行的研究主要为：陶瓷层/基体界面材料可控的多级微弧氧化制备工艺研究；陶瓷层弹性模量准确测量的方法研究；陶瓷层/基体界面附近应力应变分布特征分析，断裂参量在微弧氧化陶瓷层断裂计算方面的适用性研究，陶瓷层/基体界面结合性能和断裂韧性研究。

中文关键词： 微弧氧化；陶瓷层；界面；应力分布；断裂行为

英文摘要： Micro-Arc Oxidation technology is widely applied to improve the surface performance of light metal mechanical components. The binding strength between the ceramic layer and the substrate becomes an important index to evaluate the applicability of ceramic layer. Under friction and thermal shock environment, part of ceramic layer come to break and peel, the fundamental reason is that the material property of ceramic layer is very different from substrate. Then, the stress at the interface too concentrated to become crack propagation. Based on previous studies, the applicant propose to improve the bonding strength between ceramic layer and substrate by designing crystalline phase and structure of interface between ceramic layer and substrate, and to provide theoretical basis for optimization ceramic layer preparation process by researching fracture behavior of ceramic layer. The subject research is going to carry out include: research of multistage micro-arc oxidation preparation process, which ceramic layer/ substrate interface material must be controllable; research of accurate measured method about elastic modulus of ceramic layer; research of stress and strain distribution around layer/ substrate interface, and the applicability of fracture parameter on micro-arc oxidation ceramic layer fracture calculation, an

英文关键词： micro-arc oxidation；ceramic coating；interface；stress distribution；fracture behacior