短碳纤维增强玻璃陶瓷氧化行为的研究

Oxidation Behavior of Short Carbon Fiber Reinforced Glass Ceramic Composites

研究了单向短碳纤维增强玻璃陶瓷基复合材料的氧化行为．结果表明：短碳纤维复合材料氧化随时间的变化符合抛物线规律，基体对短纤维的包裹在一定程度上减缓了后期氧化速率；氧化造成复合材料弯曲性能衰减比氧化质量损失快；氧化过程中氧的扩散主要通过复合材料中的基体裂纹、气孔以及纤维氧化反应后所留下的通道进行气态扩散．

The oxidation behavior of unidirectional chopped carbon fiber reinforced LAS (Lithium Aluminosilicate) glass ceramic matrix composite is studied. The relationship between mass loss and oxidation time follows a parabolic law while the mechanical properties of the composites decrease with oxidation. The transport action of oxygen in the composites takes place in gaseous state through the pores and microcracks in the matrix while the cavities are created by end recession of the oxidized fibers.