真空メカノフュージョンによるAl₂O₃/Cu複合粉の作製

抄録

Using vacuum mechanofusion system developed previously, we coated spherical Al₂O₃ powders of 45 micron diameter with Cu powders of 0.2 micron diameter. The effects of the atmospheric pressure on the mechanofusion behavior of Al₂O₃/Cu particles were disscussed on the base of the particle size distribution data and the SEM observation results on the appearance of the mechanofusion particles.
The mechanofusion behavior of Al₂O₃/Cu particles depends on the atmospheric pressure, i.e., the volume percent of Cu composite particles decreases as the pressure become lower. The composite particles mechanofused under the pressure of 1.0×10⁵SPa became dark due to oxydation. At the pressure of 5.3×10^-2Pa, the composite particles indicated intrinsic Cu metallic color.