HIP処理によって作製した銅合金系複合材料の機械的性質と摩耗特性に及ぼすウイスカー, Ni及びCrの影響

概要

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Copper powders were placed with mickel or cromium powder in a ball mill, followed by mechanical blending with aluminum borate whiskers at a slow rotary speed. Three type of copper alloy matrix composites were formed by hot isostatic pressing. The averagediameters of powders were about 30μm for copper powder, about 7μm for nickel powder andabout 10μm for chromium. The effects of whisker, nickel and chromium on mechanical and wear properties of copper alloy composites were studied. The wear properties were in vestigated by changing the applied load. There were uniform distribution of whiskers in the copper alloy composites. The ultimate tensile strength of the composites was not increased significantly by blending with the whiskers. The wear volumes of the composites dependedon the normal load where varied wear morphology from mild wear to severe wear. For Cu-Cr system composite, the wear volume was decreased by blending with whisker regardless of normal load. For Cu-Ni system composites, the wear volume increased with blending whisker under low normal load. However, at high load, the wear morphology of Cu-30Ni system composite microscopically differed from that of Cu-45Ni system composite. For Cu-30Ni system composite, the wisker resulted in the increases of wear volume. For Cu-45Ni system composite, wear volume decreased with blending whisker.
一般社団法人日本機械学会の論文
1998-05-25