In recent years,the rapid development of China's aerospace industry has driven higher requirements for the temperature and distribution test of engine turbines,combustion chambers and other high temperature components,attracting widespread attention to thermo chromic paints.To address the temperature measurement challenges of high-temperature components such as aero-engine,it is necessary to further improve the upper limit of color change temperature and color display performance of temperature indicator paint.In this study,TEOS hybrid methylphenyl silicone resin(SR)was prepared by TEOS,diphenyl dimethoxy silane(DMDPS)and trimethylxy silane(TMPS).The flexibility of the resin was increased by adjusting the ratio of TEOS to DMDPS.A hybrid silicone resin with both toughness and high temperature resistance was produced by modifying the toughened SR with heptaisobutyl trisilane hydroxyl POSS that can cure at room temperature,retaining 82% of its weight at 500℃ .Pigments such as new carmine,tungsten trioxide,chromium trioxide,iron oxide,aluminum silicate were selected,along with zirconium powder and boron trioxide as high temperature fillers,and anhydrous ethanol as solvent.These were mixed and ground with the prepared high-temperature resistant silicone resin to produce a high temperature indicating paint.The effect and mechanism of color display at 400,500,800,900,1 000,1 150 and 1 300℃ were analyzed.The results show that the paint achieves excellent properties in technology,high temperature resistance and color display performance,and can be used to measure the temperature of high temperature parts.
irreversible high temperature indicator paintTEOS hybrid methyl phenyl silicone resinPOSS modificationthermochromism
国家科技期刊平台
NSTL
万方数据
