Journal of Mining and Metallurgy, Section B: Metallurgy 2012 Volume 48, Issue 1, Pages: 73-79
Full text ( 2297 KB)
Solidification characteristics of atomized AlCu4Mg1-SiC composite powders
Yamanoglu R., Zeren M., German Randall M.
In this study, rapidly solidified metal matrix composite powders have been
produced by PREP (Plasma rotating electrode process) atomization. AlCu4Mg1
alloy is used as the matrix material while SiC particles, with about 650 nm
average particle size, are used as the reinforcement phase. The
microstructural and solidification characteristics of composite particles are
studied using optical and scanning electron microscope (SEM). The
relationship between secondary dendrite arm spacing (SDAS) and particle
diameter was examined, and these composite powders were found to have
dendritic and equiaxed solidification with a fine eutectic phase. SDAS
measurements using various sized particles show that secondary dendrite arm
spacing slightly decreases with the decrease in particle size.
Keywords: Al-SiC powders, composite, powder metallurgy, rapid solidification