Microstructure and strength of Si-Ti-C-O,fibre-reinforced aluminium and aluminium alloys |
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Authors: | T B Williams D Shindo E Aoyagi M Hirabayashi Y Waku M Suzuki |
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Affiliation: | (1) Institute for Materials Research, Tohoku University, 2-1-1 Katahira, 980 Sendai, Japan;(2) Ube Industries, Ltd., Yamaguchi Prefecture, Ube City, Japan;(3) Present address: CSIRO Division of Materials Science and Technology, Locked Bag 33, 3168 Clayton, Victoria, Australia;(4) Present address: Kitami Institute of Technology, 090 Kitami, Japan |
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Abstract: | Microstructures of Si-Ti-C-O fibre-reinforced aluminium and aluminium alloys were investigated by scanning electron microscopy,
and both conventional and analytical transmission electron microscopy. In the latter samples, some inclusions were observed
between the matrix and the fibres. From the electron diffraction, high resolution microscopy and compositional analysis by
energy-dispersive X-ray, the inclusions were identified as the α-Al-Si-Fe phase. Since the longitudinal three-point bending
strength decreases with the increase of iron content, it was concluded that the α-phase inclusions on the surface of the fibre
contribute to the lower strength of the composites based on this alloy. |
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