内部酸化法によるCu-Al2O3分散合金の焼結について

概要

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The influence of the presence of highly dispersed oxide phase on the sintering behavior of internally oxidized alloys of aluminium-containing copper was investigated by means of wiremodel experiment. Measurement of neck-growth rate and microscopic observation of structural and cofigurational changes in the neck regions of the sintered wire specimen were carried out for the two alloys of different composition and of different configuration in dispersion of aluminium oxide particles.<BR>In the case of the alloy of uniform dispersion, the neck-growth rate was rather promoted by the presence of dispersed oxide particles. The observed rate of neck-growth in this case can be explained by a volume diffusion mechanism.<BR>In contrast, in the case of the alloy of non-uniform dispersion, mass transfer for the neck-growth was interrupted by the formation of a neck with convex curvature, caused by the presence of agglomerated zones of aluminium oxide under the surface of wire specimen.
社団法人粉体粉末冶金協会の論文