智能传感复合涂层的设计制备与服役行为机理

项目名称： 智能传感复合涂层的设计制备与服役行为机理

项目编号： No.51275526

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 邢志国

作者单位： 中国人民解放军装甲兵工程学院

项目金额： 80万元

中文摘要： 表面涂层常用于提高基体的耐磨、抗疲劳性能。但是，目前的耐磨、抗疲劳涂层均不具备服役过程中对渐（突）变损伤的动态感知或自我监测功能。本研究将通过创新设计，赋予表面涂层动态感知功能。拟利用超音速等离子喷涂技术制备"智能传感"复合涂层，既赋予其耐磨抗疲劳性能，又赋予其自我感知，自我监测功能。首先在基体表面喷涂压电陶瓷（BaTiO3、PZT等）作为潜在传感层，然后在传感层上喷涂FeCrBSi等合金材料作为表面耐磨及电极层，通过喷涂过程中高温的环境，完成压电材料的结构性相变，通过极化激发传感层的压电状态，赋予其力-电转变的特殊功能。表面耐磨层、传感层和基体共同作用完成零件服役过程中 "受力…感知…转化…反馈" 的智能传感功能。通过疲劳磨损试验及分析涂层间界面结合机理，探索裂纹变化规律与电信号响应机制，建立电信号、接触载荷和裂纹状态之间的有机联系，实现智能复合涂层对疲劳损伤过程的动态实时准确监测。

中文关键词： 等离子喷涂；压电涂层；孔隙率；电性能；

英文摘要： Surface coatings are usually used to improve the wear-resistance and fatigue resistance of substrate. However, the present wear-resistance and fatigue resistance coatings do not possess dynamic perception and self-monitoring function for the gradual (sudden) change damage in serving process. The objective of the present study is to endow surface coatings with dynamic perception function through innovation design. Smart sensor-based composite coatings which possess not only excellent wear-resistance and fatigue-resistance but also self-perception and self-monitoring are attempted to be prepared by supersonic plasma spraying technique. The piezoelectric ceramic (BaTiO3，PbTiO3，PZT) is firstly sprayed as latent perception function coating onto the substrate, and then FeCrBSi coating is sprayed as wear-resistant and pole coating onto the perceptional function coating. Through the high temperature of spraying process, the piezoeletric material completes the structural phase change. The piezoeletric state can be excited through polarization, which can endow the force-electricity function. The surface wear-resistance coating, perceptional function coating and substrate corporately complete the smart sensor function of "stress…apperceive…translate…feedback" in serving process. Through fatigue damage test and analysis of

英文关键词： Plasma spraying；Piezoelectric coating；Porosity；Electrical property；