· Composites ·
H Chang*, J G P Binner*, R L Higginson*, R Sambrook**.
*IPTME, Loughborough University, UK, **Hi-Por Ceramics Ltd, Sheffield, UK.
67th World Foundy Congress
Al-Mg/Al2O3 interpenetrating composites have been produced at
atmospheric pressure by infiltrating 2-10 wt.% magnesium content Al-Mg
alloys into 20% dense Al2O3 foams with highly interconnected porosity.
The processing parameters of temperature, ≥900°C, and atmosphere,
flowing N2-Ar, were investigated to determine the processing window and
infiltration kinetics. In-situ observation of the process shows that infiltration
is faster at higher temperatures, Mg contents and N2 partial pressures.
Both optical and scanning electron microscopy (SEM) have been used to
characterize the composites. Analysis using energy dispersive
spectroscopy (EDS) has revealed that nitridation occurs in the composites
with longer holding times at the processing temperature.
