抄録
Square bars of steel-fibre reinforced aluminium were made by a resistance sintering process, using atomized and mixer-treated aluminium powders and short steel fibres. The mechanical properties and conditions of fibre-matrix interface, and the relation between them in the sintered bars were investigated. The following results have been obtained. (1) Depending on the diameter and volume fraction of steel fibres, there exists a suitable input power range in the resistance sintering process so that the fibre-metal composite bars have the highest tensile strength and elongation. Even in the same range, with higher set-up effective current and shorter electric charging time, the mechanical properties become higher. (2) With the input power less than the suitable range, the density is low and the adhesion between fibre and matrix is weak. In tensile tests the fibres are pulled out without breaking. (3) With the input power above the suitable range, metallic compounds are formed along the fibre-matrix interface and the tensile strength and elongation tend to decrease with increasing input power. The tendency is more remarkable for smaller diameter fibres.
