航空发动机热障涂层导电性能研究  

Study of Electrical Properties of TBC Coated on Aero-Engine Turbine Blade

作　　者：段力[1] 姬中林 翁昊天 陈熙[1] 杨志[1] 邹兵林 王盈[2] 李杰 王强 DUAN Li;JI Zhonglin;WENG Haotian;CHEN Xi;YANG Zhi;ZOU Binglin;WANG Ying;LI Jie;WANG Qiang(Institute of Micro/Nano Engineering, Shanghai Jiao Tong University, Shanghai 200240,China;Changchun Institute of Applied Chemistry (CIAC),Chinese Academy of Sciences,Changchun 130022,China;AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200240,China)

机构地区：[1]上海交通大学微纳电子学系,上海200240 [2]中国科学院长春应用化学研究所,长春130022 [3]中国航发商用航空发动机有限责任公司,上海200240

出　　处：《航空制造技术》2019年第17期81-87,共7页Aeronautical Manufacturing Technology

摘　　要：传统的航空发动机热障涂层主要关注点是其热绝缘特性及可靠性的研究,并且已经形成了一整套基于YSZ的热障涂层技术,但是缺乏热障涂层高温导电性能的研究。另一方面,基于对航空发动机智能化的要求,需要在涡轮叶片表面制造电学器件(传感器),所以有必要对航空发动机热障涂层的电学性能进行相关的研究。研究了YSZ热障涂层在高温下的电学性能,提出了能提高其高温电绝缘性能的技术方法:可以对YSZ热障涂层喷涂配方进行改良。试验证明,在涂层中加入一定含量的氧化铝可以把热障涂层的高温电绝缘性能提高4个量级,可以满足在涡轮叶片热障涂层之上制作微传感器的实际工程需要。此外,利用计算机仿真技术对高温环境下的热障涂层复合结构进行了电学性能的综合分析,分析的结果证明,在传感器/热障涂层/涡轮叶片基底的复合结构当中,热障涂层表面的传感器电流的高温特性是各层材料的导电性、传感器与热障涂层的结构与尺寸的综合函数。Traditional aero-engine thermal barrier coatings (TBC) mainly focus on thermal insulation properties and reliability, and YSZ-based TBC is already well-developed technology. Yet its electrical properties under elevated temperatures is missing. On the other hand, due to the need to build sensors on turbine blade, study on electrical insulation of TBC is necessity. In this paper, the electrical properties of YSZ thermal barrier coatings at high temperature were studied, and a new YSZ spraying formula is proposed that its high temperature electrical insulation performance. Experiments show that adding a certain amount of alumina into the coating can improve the electrical insulation performance at high temperature by four orders of magnitude, and can meet the practical needs to embed MEMS sensors on the surface of turbine blades. In addition, the electrical properties of the metal/TBC/metal sandwich structure at high temperature have been analyzed by computer simulation. Sensor performance is a composite function of the electric conduction properties under high temperatures as well as size and dimensions of each layer.

关 键 词：传感器 航空发动机智能化 热障涂层 高温温度测量 计算机仿真 

分 类 号：TG174.4[金属学及工艺—金属表面处理] V263[金属学及工艺—金属学]