info:eu-repo/semantics/conferenceProceedings
OPTIMUM PARAMETERS FOR MINIMUM RESIDUAL POROSITY IN Al/SiCP COMPOSITES
Autor
JUAN ANDRES AGUILAR MARTINEZ
Institución
Resumen
The effect of the following processing parameters on the residual porosity of Al/SiCp
composites was investigated: SiC particle size, SiC type and Mg content in the aluminum
alloy. The contribution of each of the aforementioned parameters and their interactions was
determined using analysis of variance and the effect of the levels of each parameter was
investigated using surface response analysis. Results from surface response analysis are in
excellent agreement with those obtained with ANOVA. Anova results show that particle
size is the parameter that most significantly impacts the residual porosity, followed by the
interaction between SiC type and SiC particle size. Surface response analysis indicates that
for both types of SiC, residual porosity diminishes with decreasing particle size. Using 20
μm powders, none of the two types of SiC significantly affects residual porosity;
nonetheless, a composite with C SiC exhibits the minimum residual porosity. Using 75 μm
powders, variation in type of SiC, significantly impacts residual porosity. Regardless of the
Mg level in the alloy, the lower the particle size, the lower the porosity. At a given particle
size, variation in Mg content does not significantly affect residual porosity; however, an
alloy 3 wt.% Mg produces the highest porosity. Accordingly, the optimum parameters for
minimum residual porosity are: 20μm SiC type C, with an alloy 6 wt.% Mg.
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