발간논문

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Vol.34, No.1, 85 ~ 92, 1996
Title
Interfacial Reaction and Fracture Behavior of Aluminum Alloy Reinforced with Cobalt Coated Al2O3 Fiber
백경호Kyeong Ho Baik, 이언식Eon Sik Lee, 이규창Gyu Chang Lee, 안상호Sang Ho Ahn
Abstract
The interfacial reaction and the fracture behavior of 2024 aluminum alloy reinforced with cobalt coated Al₂O₃ fibers with particular attention on effect of coating-fiber interface have been investigated. The cobalt coated fibers were annealed at temperature ranging from 300 to 1000℃ in a vacuum furnace to generate interfacial reaction between the cobalt coating and the Al₂O₃ fiber. Microstructural analysis revealed that the formation of Al_9Co₂ and Co₂O₃ phases resulted from coating-fiber interfacial reaction at high annealing temperature. The tensile tests revealed that both tensile strength and elongation of the composite increased significantly as the fiber annealing temperature increased. In-situ fracture study and SEM fractographic analysis showed that the major fracture behavior of the composite changed from interfacial debonding to matrix deformation.
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