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Preparation method of ceramic composite material heat screen containing gas film holes
The invention discloses a preparation method of a ceramic composite material heat screen containing gas film holes. The heat shield is prepared by adopting a net size forming method, on one hand, a metal round needle is used for occupying on the surface of a male die, fiber fabric is directly woven on the surface of the male die in a profiling mode, air film holes are formed in situ, fiber damage caused by machining punching can be avoided, and influences such as stress concentration at the positions of the air film holes are reduced; on the other hand, the aluminum oxide and silicon oxide binary ceramic matrix is adopted, the problems that a single ceramic matrix is insufficient in mechanical property, temperature resistance and the like are solved, and the obtained ceramic composite material heat shield containing the gas film holes has the advantages of being resistant to high temperature, high in strength, good in toughness, good in heat dissipation performance and the like and can be widely applied to the field of aero-engines.
本发明公开了一种含气膜孔陶瓷复合材料隔热屏的制备方法。隔热屏采用净尺寸成形方法制备，该方法一方面利用金属圆针在阳模表面占位，并直接在阳模表面进行仿形编织纤维织物，原位形成气膜孔，能够避免机械加工打孔带来的纤维损伤，减小了气膜孔位置应力集中等影响；另一方面，采用氧化铝+氧化硅二元陶瓷基体，解决了单一陶瓷基体力学性能和耐温性能等方面不足的问题，所得含气膜孔陶瓷复合材料隔热屏具有耐高温、高强度和韧性及散热性好等优点，可在航空发动机领域广泛应用。
Preparation method of ceramic composite material heat screen containing gas film holes
The invention discloses a preparation method of a ceramic composite material heat screen containing gas film holes. The heat shield is prepared by adopting a net size forming method, on one hand, a metal round needle is used for occupying on the surface of a male die, fiber fabric is directly woven on the surface of the male die in a profiling mode, air film holes are formed in situ, fiber damage caused by machining punching can be avoided, and influences such as stress concentration at the positions of the air film holes are reduced; on the other hand, the aluminum oxide and silicon oxide binary ceramic matrix is adopted, the problems that a single ceramic matrix is insufficient in mechanical property, temperature resistance and the like are solved, and the obtained ceramic composite material heat shield containing the gas film holes has the advantages of being resistant to high temperature, high in strength, good in toughness, good in heat dissipation performance and the like and can be widely applied to the field of aero-engines.
本发明公开了一种含气膜孔陶瓷复合材料隔热屏的制备方法。隔热屏采用净尺寸成形方法制备，该方法一方面利用金属圆针在阳模表面占位，并直接在阳模表面进行仿形编织纤维织物，原位形成气膜孔，能够避免机械加工打孔带来的纤维损伤，减小了气膜孔位置应力集中等影响；另一方面，采用氧化铝+氧化硅二元陶瓷基体，解决了单一陶瓷基体力学性能和耐温性能等方面不足的问题，所得含气膜孔陶瓷复合材料隔热屏具有耐高温、高强度和韧性及散热性好等优点，可在航空发动机领域广泛应用。
Preparation method of ceramic composite material heat screen containing gas film holes
一种含气膜孔陶瓷复合材料隔热屏的制备方法
WU WEI (author) / FEI HOUJUN (author) / SUN JI (author) / LI ZHONGQIU (author)
2023-12-29
Patent
Electronic Resource
Chinese
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