摘要: |
在搪瓷涂层的基础上,磨加一定比例的Cr2O3陶瓷颗粒制备了颗粒增强搪瓷复合涂层,并研究了其抗热震性能。结果表明,经10次1000℃到室温的冷热循环试验后,传统搪瓷涂层出现严重崩瓷现象,而颗粒增强搪瓷复合涂层无明显变化,表明陶瓷颗粒的添加可一定程度上改善搪瓷涂层的抗热震性能。 |
关键词: 搪瓷涂层;陶瓷颗粒;抗热震性能;韧性 |
基金项目: |
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Property Improvement of the Enamel Coating Used in Turbine Hot Gas Duct for Liquid Rocket Engine |
Li Hulin Wang Guoqiang
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Xi’an Space Engine Factory, Xi’an 710100
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Abstract: |
Enamel coating plays an important role in protecting the turbine hot gas duct of the liquid rocket engine. However, poor ductility and low thermal-shocking resistance of the enamel coating restrict the property of the liquid rocket engine. In this paper, an enamel-ceramic composite coating was prepared by adding Cr2O3 ceramic powder into enamel slurry. The thermal-shocking resistance of the composite coating was also investigated. Results show that gaffing occurs on the surface of the enamel coating after 10 cycles at 1000℃ in air, however, the surface of the composite coating was smooth without undulating and gaffing. It is suggested that Cr2O3 ceramic powder could enhance the thermal-shocking resistance of the coating. |
Key words: enamel coating;ceramic powder;thermal-shocking resistance;ductility |