The Young's modulus (E) and fracture toughness (J(IC)) of MMCs reinforced with SiCP

The results of examining the crack resistance for magnesium matrix composit es containing various amounts (5, 10, 20, 30 wt %) of silicon carbide parti cles were presented. For the determination of Young's modulus and fracture toughness, as measured by the integral J(IC), a specimen flexibility measur ement method was used. The investigated composites showed that the modulus E grows proportionally to the weight fraction of SiC particles. The inverse ly proportional dependence between the J(IC) integral and the fraction of S iC particles contained in the MgAl5 matrix was also determined. In addition , the correlation between values predicted by a theoretical model and measu red experimentally was discussed.