| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effect of Glass Powder on the Thickness and Porosity of Polysilazane Ceramic Coating |
| YANG Xiaojun1, CHI Zuohe2, WANG Jinqing2, QIAN Peihao2, WANG Guangxin2, WANG Jie2
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1 College of Mechanical Engineering, Quzhou College, Quzhou 324000, China
2 College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China |
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Abstract In order to study the effect of glass powder on the structure of polysilazane ceramic coating, the pyrolysis processes of polysilazane and polysilazane/glass powder mixture were studied by TGA and FTIR. The results show that the pyrolysis trend of the samples before and after adding glass powder is basically the same. In the whole pyrolysis process, the polysilazane will release gas, in which ammonia will be produced when the temperature is below 500 ℃ and methane will be mainly released at 500—700 ℃. Glass/ceramic composite coating was prepared on TP 347 substrate by dip coating, and its micro morphology was characterized by SEM. The results show that glass powder can significantly improve the critical thickness of the coating. In order to prevent the composite coating from forming large pores after sintering, the sintering temperature can be increased as high as possible under the allowable substrate temperature.
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Published: 23 March 2021
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| Fund:Zhejiang Natural Science Foundation (LQ20E060017). |
About author:: Xiaojun Yang, senior engineer, graduated from Zhengzhou University in 1989. Working in College of Mechanical Engineering, Quzhou College, mainly engaged in anticorrosion coating of boilers, biomass power generation technology research and related teaching work. He has won the innovation fund of the Ministry of Science and Technology of the People's Republic of China, the public welfare project of the Science and Technology Department of Zhejiang Province and many patents.
Zuohe Chi, professor, graduated from Xi'an Jiaotong University with a master's degree in thermal enginee-ring in 1987, and from Zhejiang University with a doctor's degree in engineering thermophysics in 1996. He is now a professor of China University of Metrology and director of Energy Engineering Research Institute. He is mainly engaged in the teaching and research work of low pollution combustion, SNCR denitration, anticorrosion coating of boilers, engineering gas-solid multiphase flow, biomass gasification and liquefaction of large-scale power station boilers. He has published 25 papers, 6 works and 8 main inventions. |
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2021, Vol. 35 
