Y-TZP/LZAS微晶玻璃功能梯度涂层残余应力分析  

Analysis on the residual stresses in Y-TZP /LZAS glass-ceramic gradient coatings

作　　者：龚伟[1,2] 周黎明[2] 王恩泽[1,3] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]西南科技大学制造科学与工程学院,四川绵阳621010 [3]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《功能材料》2014年第17期17140-17144,共5页Journal of Functional Materials

基　　金：四川省教育厅重点资助项目(10ZA020);四川省科技计划资助项目(2012FZ0020)

摘　　要：为了提高钢基体微晶玻璃涂层的韧性,设计了Y-TZP/LZAS微晶玻璃功能梯度涂层。运用有限元软件,分析了梯度层数目、梯度层厚度和层间3Y-TZP体积组分差等参数对涂层/基体界面残余热应力的影响。结果表明,涂层表层主要分布为径向压应力;在涂层/基体界面的边缘区域应力集中较为严重;涂层/基体界面处的径向应力、轴向应力和剪切应力以及梯度层数目、梯度层厚度和3Y-TZP体积组分差均有密切关系。最后通过涂搪法制备了梯度涂层,测试了涂层表面残余应力,并与有限元结果对比,以验证模拟的准确性。Y-TZP/LZAS glass-ceramic gradient coatings on Q235 steel substrate were designed in order to improve the toughness of glass-ceramic coatings.The effects of the number of graded layers,coating thickness and the volume difference of 3Y-TZP between layers on the residual stress were analyzed by using finite element software.The results show that radial compressive stress was distributed on the surface of graded coatings. There are clear stress concentration in the coating/substrate interface edge.The layer numbers,the coating thickness,and the volume difference of 3Y-TZP between layers have an important influence on radial stress, axial stress and shear stress in the coating/substrate interface.Y-TZP/ LZAS glass-ceramic gradient coatings were fabricated on the Q235 steel substrate via slurry methord.The residual stress of gradient coatings were measured by X-ray diffraction approach to verify the reliability of the simulation.

关 键 词：功能梯度涂层 残余热应力 有限元分析 界面 

分 类 号：TB42[一般工业技术]