抵抗焼結法によるボロン繊維-チタン複合材の製造

概要

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Boron fibre-titanium composite was produced by a resistance sintering process. A mixture of titanium powder (-350 mesh) and boron fibre (200, μmφ and 140 μmφ; their tensile strenghts are 320 kg/mm<SUP>2</SUP> and 356 kg/mm<SUP>2</SUP>, respectively) was resistance-sintered with continuous or cyclic current flow in 0.6-6.0 sec. A composite resistance-sintered under an optimum condition using cyclic current flow exhibited a higher tensile strength than that of the resistance-sintered pure titanium at higher temperatures, and the fibre reinforcing effect on the tensile strength was recognized even at room temperature. When a composite was resistance-sintered with cyclic current flow, the reaction layer between boron fibre and titanium was much thinner than that formed in continuous current flow sintering. Tensile strength decreased with the increase of the thickness of boron-titanium reaction layer.
社団法人粉体粉末冶金協会の論文