炭/炭刹车盘的复合抗氧化涂层探讨

OXIDATION RESISTANT COATING FOR CARBON/CARBON COMPOSITES AIRCRAFT BRAKE

在C/C刹车盘的非摩擦面上涂层是氧化防护的一种有效方法,对涂层配方进行DTA分析,确定了涂层的固化温度,对经磷酸和氧氯化磷处理过的样品的起始氧化温度进行了测试,对不同复合抗氧化剂处理过的样品的抗氧化、抗热震性能进行了试验,采用SEM,TGA,EDAX对涂层及涂层与基体之间的界面结构、涂层的成分等进行了观察和分析,表面预浸磷酸后浸TEOS(正硅酸乙酯)再涂层有最佳且稳定的抗氧化效果。

Oxidation resistant coating on the non-friction surface of the aircraft brake disc is significance to protect the C/C composites. From DTA analysis of the coating material with developed formulation, the reasonable coating curing temperature was defined. Various coatings formed on the composites with different components and various treatment processes were investigated at elevated temperatures and due to the thermal shock cycles in dry atmosphere. Surface morphology, coating compound and interface structure were with SEM, TGA, EDAX observed or analysed. Samples after pre-impregnation with H_3 PO_4 then TEOS and followed by successive coating formed a suitable protective coating that was remarkably stable against oxidation. Oxidation resistant coating on the non-friction surface of the aircraft brake disc is significance to protect the C/C composites. From DTA analysis of the coating material with developed formulation, the reasonable coating curing temperature was defined. Various coatings formed on the composites with different components and various treatment processes were investigated at elevated temperatures and due to the thermal shock cycles in dry atmosphere. Surface morphology, coating compound and interface structure were with SEM, TGA, EDAX observed or analysed. Samples after pre-impregnation with H_3 PO_4 then TEOS and followed by successive coating formed a suitable protective coating that was remarkably stable against oxidation.