Dispersion of ultrafine SiC particles in molten Al-12Si alloy

来源期刊:中国有色金属学报(英文版)2011年第z1期

论文作者:Jin-Ju PARK Sang-Hoon LEE Min-Ku LEE Chang-Kyu RHEE

文章页码:33 - 36

Key words:Al-12Si alloy; dispersion; self-propagating high-temperature synthesis (SHS); ultrafine ceramic; SiC

Abstract: The bulk Al-12 Si eutectic composites were fabricated through a conventional liquid metal casting route, especially with the help of ultrafine ceramic powders made by self-propagating high-temperature synthesis (SHS) process. The SHS powders were fabricated by the chemical reaction between micro-sized SiC and Al particles at very high combustion temperatures, producing the coarse Al particles (several tens of microns) containing ultrafine SiC ceramic particles. Microstructural observation revealed that the addition of ultrafine SiC particles has a crumbling tendency of Si eutectic phase. It is suggested that the casting method combined with SHS process is promising for fabricating the Al-based MMC with ultrafine ceramic particles.

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