Consolidation and Mechanical Properties of Gas Atomized Al-Si Powder

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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.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

2633-2638

DOI:

10.4028/www.scientific.net/MSF.539-543.2633

Citation:

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

Online since:

March 2007

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$35.00

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