SiC晶体测温技术研究

Research of temperature measurement technology based on SiC crystal

针对航空发动机结构复杂和工况条件苛刻的问题,研究基于SiC晶体材料的测温技术,解决航空发动机燃烧室、涡轮和尾喷管等高温部件的测温难题。选取国产6H-SiC晶体作为材料,进行6H-SiC晶体的中子辐照。研究晶体测温的温度判读方法,提出X射线衍射峰半高宽作为温度判读参数,测量温度可达1 600℃,测量精度达到1%,比国外晶体测温技术的测温范围更高。该测温技术具有微尺寸、微质量、无引线的非侵入式优点,可用于航空发动机及燃气轮机的高温测量。

Concerning the complex structure and demanding working conditions of the aero-engine, this research attempted to solve the difficulty in measuring high-temperature components, such as the combustor, the turbine and the exhaust nozzle by using the measurement technique for SiC crystal materials. In this paper, chose 6H-SiC crystals made in China, and conducted neutron irradiation of 6H -SiC crystals. In analyzing temperature reading methods of crystal -based temperature measurement,the X-ray diffraction full width at half maximum was adopted as the temperature reading parameter. The measurement temperature could be reach 1 600 益,and the measurement accuracy reached 1%. Results suggested that the temperature measurement technique had a higher measurement scope compared with the foreign counterparts. With advantages of mini- size, mini-weight and lead-free no-invasion mode, the temperature measurement technique put forward in this paper is applicable to high-temperature measurement of the aero-engine and the gas turbine.