Abstract
After optimization of the processing route, the mechanical properties of the composites were evaluated with varying particle sizes and volume fractions of reinforcement. The best dispersion of the particles in the composite was obtained by using attrition milling followed by spray-drying; nevertheless, ball-milling led to satisfactory results for particle sizes higher than 3 μm. Elastic moduli, hardness and fracture toughness increase with the volume fraction of SiC. Fracture strength increases with both decreasing particle size and increasing volume fraction to reach 400 MPa for a glass matrix composite containing 47 vol% of SiC with 1 μm average panicle size. A further improvement is achieved by crystallizing the matrix.
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