Fabrication and Characteristics of Hypereutectic Prealloyed Al-Si Powders by Gas Atomization Process

Abstract:

The hypereutectic prealloyed Al-Si powders were prepared by gas atomization process. The microstructure and compacting ability of the atomized Al-Si powders were investigated. With increasing the gas pressure of the atomization, the average powder size and oxygen content were decreased. The size of primary eutectic Si particles in the as-atomized powders was about 8~10. As-atomized powders were hot-pressed into a cylindrical shape. Relative density of the hot-pressed samples was achieved about 96~99 % of theoretical density. Some properties of the samples were evaluated in this paper.

• Periodical: Key Engineering Materials (Volumes 317-318)
• Pages: 61-64
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.317-318.61
• Online since: August 2006
• Authors: Yong Jin Kim, L.F. Wang, In Sang Chung, Jin Chun Kim, Tae Suk Jang
• Keywords: Compacting Ability, Gas Atomization, Hot-Pressing, Hypereutectic Al-Si

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