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A team of researchers at Tokyo University of Science and Technology in Japan recentlya new type of siliconized thermal insulation coating to improve the thermal efficiency of aeronautical gas turbine engines.
The coating material is designed and developed for the protection of the high temperature part of the aero-gas turbine engine, which can effectively inhibit the formation of silicon dioxide in the coating which has adverse effects on the structure, but the oxidation mechanism of the coating has yet to be further studied.
this, the team delved into the ratio ofelements to silicon elements in the coating, as well as the factors affecting oxidation reactions, in order to find more ways to improve the energy efficiency of gas turbines.
researchers used the diamond ceramic compound as a solution for the thermal efficiency of gas turbine engines, and since the engine temperature is as high as 1200 degrees C, the composite surface needs a thermal protection coating to inhibit the oxidation reaction of the diamond sand and the evaporation of silicon dioxide, thus avoiding the loss of the composite material and structural defects, such as cracking and outer shedding.
existing coating technology does not completely prevent silica oxide because oxygen penetrates into the micro-cracks in the protective coating.
for this reason, the researchers used the silicon- system as a new coating material (with a high melting point and mainly siliconized ), and the oxide layer was firmly attached and not volatile.
the material's reaction in an air or water vapor environment has yet to be further studied.
researchers used a variety of characteristics to test the performance of siliconecoatings through different environmental conditions, and studies have shown that silicon- ratio is a major factor affecting coating performance.
researchers believe that "if a coating that is more resistant to harsh operating conditions is successfully developed, the engine components will be better protected against heat and the engine will be more thermally efficient."
" study illustrates the silicon- oxidation reaction from a new perspective, with the aim of developing a protective coating for aero-gas turbine engines that reduces air freight costs and fuel consumption while reducing adverse environmental impacts.