|
Abstract 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.
|
|
Received: 16 October 2023
Published: 25 July 2024
|
|
|
|
|
|
2024, Vol. 7 
