Hydrogen Reduction and Sintering Behavior of Al2O3/CuO Powder Mixtures Prepared from Different Raw Powders
The reduction behavior of Al2O3/CuO powder mixtures, prepared from Al2O3/CuO or Al2O3/Cu-nitrate, was investigated by using thermogravimetry and hygrometry. Also, the influence of powder characteristics on the microstructure and properties of hot-pressed composites is analyzed. It was found that the hydrogen reduction process of nano-sized oxide particles and properties of sintered composites strongly depends on their distribution and size in composite powder. The formation mechanisms of nano-sized Cu dispersions are discussed based on the powder characteristics and reduction kinetics. In addition, the dependence of the microstructure and mechanical properties of hot-pressed composites on powder characteristics is discussed in terms of the initial size and distribution of Cu particles.
T. Ohji, T. Sekino and K. Niihara
S. T. Oh and S. J. Yoon, "Hydrogen Reduction and Sintering Behavior of Al2O3/CuO Powder Mixtures Prepared from Different Raw Powders", Key Engineering Materials, Vols. 317-318, pp. 181-184, 2006