Abstract
The SiC foam/Al co-continuous phase composite was prepared by in-situ reaction pressureless infiltration (ISRPI). The influence of powder ratio on the impregnation effect and the mechanical properties of the material was studied. The relationship between the mechanical properties and the interfacial reaction was discussed. The results show that the addition of Mg powder of 8% mass fraction increases the impregnation effect, and the formed magnesium spinel strengthens the bonding interface, which makes the compacting of the composite improve. At the same time, adding 2% mass fraction of Si in the infiltrated powder can inhibit the production of brittle material Al4C3 and improve the mechanical properties of the composites. The compressive strength of SiC foam/Al co-continuous phase composites with good interfacial bonding reaches 832MPa.
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