Consolidation and Mechanical Properties of Gas Atomized Al-Si Powder
Hypereutectic prealloyed Al-20wt.%Si powders were prepared by the gas atomization process. Characteristics of the atomized Al-Si powders were investigated. With increasing gas pressure of the atomization, the average powder size and oxygen content decreased. Primary Si particles in the as-atomized powders were about 8-10 ㎛. Sintering behavior of the atomized Al-Si powders was discussed with sintering temperature. As-atomized powders were hot-pressed and extruded into a cylindrical shape. 96-99% of theoretical density was achieved by the hot consolidation. Microstructure changes as well as hardness and tensile properties of the samples were evaluated in this paper.
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Y. J. Kim et al., "Consolidation and Mechanical Properties of Gas Atomized Al-Si Powder", Materials Science Forum, Vols. 539-543, pp. 2633-2638, 2007