Mechanical properties of SiC/Gr/Al composites fabricated by squeeze casting technology

SiC/Gr/Al composites were fabricated by squeeze casting with graphite volume fractions of 3–7% and particles size of 1, 6, 10, 20 and 70 μm. No Al4C3 brittle interfacial product could be detected by transmission electron microscopy. With increasing volume fraction and particle size of graphite, the tensile strength (σb) decrease from 420 to 235 MPa and the elastic modulus (E) decrease from 166 to 116 GPa. These changes were in close accordance with the linear function: E = 224σb + 61,695.