基于稀土离子荧光特性的智能温敏涂层研究现状

Research status of intelligent temperature sensitive coatings based on fluorescence characteristics of rare earth ions

摘要:

智能温敏涂层是一种新兴的功能性涂层，其具有实时检测温度变化的功能，可以达到涂层使用过程中温度异常的及时发现，及时处理。减少了外部测温装置检测的误差以及测温时的不便利性。本文详细介绍了航空发动机温度检测的研究现状，并介绍了稀土离子检测温度时所利用上转换发光的原理，其测温优势在于实时检测，没有外接测温等方式对工件的形状尺寸要求，没有测温延迟。但不同稀土离子的测温温度段存在较大不同，无法兼顾所有的温度范围。还介绍了基于稀土荧光离子的温敏热障涂层的应用原理，该涂层在应用于航空发动机测温以及热障涂层性能检测等方面具有较大优势。总结了国内外学者研究的不同的材料体系及其温度检测范围，分析了温敏热障涂层目前的应用现状以及未来发展趋势。

关键词:温度检测;稀土离子;上转换发光;光学温度测温;温敏热障涂层

Abstract:

Intelligent temperature sensitive coating is a new kind of functional coating, which has the function of real-time detection of temperature changes, can achieve the timely detection and treatment of abnormal temperature in the process of coating use. The measurement error of external temperature measuring device and the inconvenience of temperature measurement are reduced. In this paper, the research status of aeroengine temperature detection is introduced in detail, and the principle of up conversion luminescence used in rare earth ion temperature detection is introduced. The advantage of temperature measurement lies in real-time detection, no external temperature measurement and other methods on the shape and size of the workpiece requirements, no temperature delay. However, the temperature range of different rare earth ions is quite different, which can not take into account all the temperature ranges. The application principle of temperature sensitive TBC based on rare earth fluorescent ions is also introduced. The coating has great advantages in the application of aeroengine temperature measurement and TBC performance testing. This paper summarizes the different material systems and their temperature detection range studied by scholars at home and abroad, and analyzes the current application status and future development trend of temperature sensitive thermal barrier coatings.

Key words:temperature detection; rare earth ions;upconversion luminescence;optical temperature measurement;temperature sensitive thermal barrier coating