2018 年 65 巻 8 号 p. 465-469
Cu–Mo harmonic-structured composite was produced via mechanical milling (MM) followed by spark plasma sintering (SPS), and its thermal and mechanical properties were investigated in detail. Microstructural observation of the MM powders and SPS compacts was achieved using scanning electron microscopy (SEM)/energy dispersive X-ray spectroscopy (EDS). The mechanical properties of the SPS compacts were evaluated using results of the Vickers hardness test. The thermal properties of them were evaluated using results of thermo-mechanical analysis and laser flash method. SEM/EDS micrographs profile indicated that the Cu–Mo harmonic-structured composite has the network region composed of molybdenum and the dispersed region of copper. The Cu–Mo harmonic-structured composites demonstrate low coefficient of linear expansion and enough thermal conductivity compared to the conventional Cu–Mo particle dispersed composite. The hardness of Cu–Mo harmonic-structured composite corresponds to the Voigt model of the rule of mixture of Cu and Mo. The harmonic structure control is effective for an improvement of the thermal and mechanical properties.
