Microstructural Modeling and Thermomechanical Properties
Microstructural Modeling and Thermomechanical Properties
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微观结构建模和热机械性能
DOI：
10.1002/9783527622412.ch10
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
D. Koch
中科院分区：
文献类型：
--
作者：
D. Koch
与整体陶瓷相比，陶瓷基复合材料表现出较高的断裂韧性和损伤容限，只有脆性组分陶瓷基体和陶瓷纤维有效地相互作用才能实现这一点。当CMC加载时，裂纹通常在基质中萌生。为了增强容错性，即使当基质中的裂纹向纤维-基质界面扩展时，纤维也必须保持完好。如果纤维的强度和断裂韧性与其他组件的抗裂性很好地匹配，例如基质和纤维-基质界面，就可以实现这一点。CMC微观结构的两个一般调整允许此行为：
Ceramic matrix composites (CMC) show, in comparison to monolithic ceramics, high fracture toughness and damage tolerance, which only can be achieved if both brittle components, the ceramic matrix and the ceramic fibers, interact with each other in an efficient way. When CMCs are loaded, cracks are generally initiated in the matrix. For enhanced failure tolerance, the fibers must remain intact even when the cracks in the matrix propagate toward the fiber-matrix interface. This is realized if strength and fracture toughness of the fibers are well adapted to crack resistance of the other components, such as the matrix and fiber-matrix interface. Two general adjustments of the CMC microstructure allow this behavior: