발간논문

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Vol.30, No.8, 946 ~ 955, 1992
Title
Fracture Behavior of a SiC Continuous Fiber Reinforced Al Composite
이창길Chang Gil Lee, 이성학Sung Hak Lee, 김낙준Nack J . Kim
Abstract
The main objective of this study is to investigate the effect of interface characteristics on the fracture behavior in a SiC continuous fiber reinforced 6061 Al composite. Microstructure observations, SEM in-situ fracture tests and AES analyses were conducted on the composite to identify the microfracture processes. Detailed microstructural analyses showed that Al matrix contained a significant amount of coarse second phase particles near the matrix/fiber interfacial region. It was also found from in-situ observations of crack initiation and propagation that the interfacial debonding occurred at the interfaces between the SiC fiber and the carbon coating layer in the early loading stage, providing easy crack propagation path. In order to improve mechanical properties of the Al/SiCr composite, thus, it is suggested that a new fiber coating method should be developed during the composite processing to prevent the critical interfacial debonding.
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