機械的合金化法を応用した炭化ホウ素分散強化銅の作製

概要

論文の詳細を見る
The mechanical alloying was carried out using pure electrolytic copper, amorphous boron and graphite powders as starting materials, and the solid solutions or ultra fine mixtures of Cu-B-C system were obtained. These powders were altered to a boron carbide-dispersion-strengthened copper by the subsequent heat-treatment in a vacuum below the temperature of 1323 K. The mean particle sizes of B4C precipitates are about 100-300 nm. The hardness values of B4C-dispersion-strengthened coppers increased with volume percentage of B4C. In the alloy with constant volume percentage of B4C, the maximum hardness value was obtained by the heat-treatment at 873 K. The separation of copper from the boron carbide-dispersion-strengthened copper did not take place by heat-treatment at 1323 K for 7.2 ks, so the present boron carbide-dispersion-strengthened copper is excellent in thermal stability than other particle-dispersion-strengthened coppers.
社団法人粉体粉末冶金協会の論文