热障涂层在线/离线磷光温度测量技术研究进展

精确测量涡轮叶片表面热障涂层温度对航空发动机和地面燃气轮机设计和研制具有极其重要的意义。近年来,基于热像磷光材料磷光特性的热障传感涂层在线测温技术与热历史磷光涂层离线测温技术得到了迅猛发展。前者通过在线测量高温下磷光信号来获取实时温度信息,后者通过离线测量经高温服役后的磷光材料不可逆磷光信号变化来获取服役温度信息。这两项技术都适用于高温、高腐蚀环境下热障涂层非干涉、非接触式和高精度温度测量,具有广阔的应用前景。从热障涂层在线/离线测温原理与方法、磷光材料与制备及应用3个方面详细介绍了热障涂层在线/离线测温技术的研究现状与技术特点,并对这两种技术的发展进行了展望。

Research Progress of On-Line/Off-Line Phosphor Thermometry Technology for Thermal Barrier Coatings

Accurate temperature monitoring in thermal barrier coatings on turbine blades is of paramount importance for the design and development of aero-engines and gas turbines.Recently,a new on-line temperature measurement technology using thermal barrier sensor coatings and a new off-line temperature measurement technology using thermal history sensor coatings based on temperature-dependent phosphorescence properties of thermographic phosphors are both developed rapidly.The former obtains the real-time temperature by on-line measuring the phosphorescent signal,and the later obtains the exposure temperature by off-line measuring the irreversible changes in the phosphorescence properties after operation.Both of these technologies are suitable for non-interference,non-contact,high-precision temperature measurement of thermal barrier coatings under high temperature and high corrosion environments,and have broad application prospects.According to the introduction of the principles and methods of on-line/off-line temperature measurement in thermal barrier coatings,thermal barrier sensor and thermal history sensor materials and preparation,their applications in aero-engines and gas turbines,the research status and technical characteristics of on-line/off-line temperature measurement technology of thermal barrier coatings are described in detail.Finally,the development of the two technologies is also prospected.