Effect of Fiber Surface Structure on Interfacial Reaction between Carbon Fiber and Aluminium(<Special Issue>Recent Advances in Materials and Processing (I))

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Surface structure of carbon fiber and interfacial reaction between fiber and aluminium in carbon fiber reinforced aluminium composites were investigated by high-resolution transmission electron microscopy. Low and high graphitized carbon fiber reinforced pure aluminium composites were prepared by ultrasonic liquid infiltration. Vapor grown carbon nano fiber (VGCF) reinforced pure aluminium composites were prepared by hot-pressing. Heteroatoms, which existed abundantly in the surface of low graphitized carbon fiber, caused carbon lamellar structure in the fiber surface pronounced curvature. VGCF surface structure appeared regular and linear graphitic lamellae. Low graphitized fiber reinforced pure aluminium composites revealed serious interfacial reaction produced crystalline aluminium carbides (Al_4C_3), compared to composites reinforced by high graphitized fiber. On the other hand, Al_4C_3 crystalline reactants were not found at the interface of VGCF reinforced pure aluminium composites, but formation of interlayer was observed. In order to promote Al_4C_3 growth, carbon fiber reinforced composites were heat-treated at 573 K and 873 K for 1.8ks. Al_4C_3 interfacial phases in low and high graphitized fiber reinforced aluminium composites grew with the rise in the temperature. The heat-treatment resulted in the formation of noncrystalline Al_4C_3 interlayer by energy dispersive X-ray spectroscopy analysis of electron microscopy. At high temperature, Al_4C_3 was not grew and increased merely at the interface between carbon fiber and pure aluminium matrix, and moreover, the formation of new Al_4C_3 crystal occurred in this interlayer.
一般社団法人日本機械学会の論文
2005-10-15

Effect of Fiber Surface Structure on Interfacial Reaction between Carbon Fiber and Aluminium(<Special Issue>Recent Advances in Materials and Processing (I))

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