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纤维与基体间的物化相容性是决定纤维增强陶瓷的关键。高强度、高模量纤维为制得高强高韧的复合材料所必需。基体与纤维间的热膨胀应相匹配,最好是纤维的热膨胀系数稍大于基体。纤维与基体间的化学反应会引起纤维性能的退化。基体与纤维间的界面结合强度以适宜为度。本文通过扫描电镜、电子探针等手段观察分析了纤维与基体的形貌及界面结合状况,讨论了复合材料结构与性能的关系。
The physicochemical compatibility between fiber and matrix is the key to decide the fiber reinforced ceramic. High-strength, high-modulus fibers are required to make high-strength, high-toughness composites. The thermal expansion between the matrix and the fibers should match, preferably the thermal expansion coefficient of the fiber is slightly larger than the matrix. The chemical reaction between the fiber and the matrix can cause degradation of the fiber properties. The bonding strength between the matrix and the fiber is suitably at the interface. In this paper, the morphology and interfacial bonding of fiber and matrix were observed and analyzed by scanning electron microscope and electron probe. The relationship between the structure and properties of the composite was discussed.