| Title |
Interfacial Reaction and Fracture Behavior of Aluminum Alloy Reinforced with Cobalt Coated Al2O3 Fiber |
| Authors |
백경호(Kyeong Ho Baik); 이언식(Eon Sik Lee); 이규창(Gyu Chang Lee); 안상호(Sang 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. |