Effect of ceramic nanoparticle reinforcements o. The quasistatic and dynamic mechanical properties of magnesium-based metal matrix composites

We have investigate. The microstructure. The quasistatic and high-rate mechanical properties of magnesium (Mg)-based metal-matrix composites (MMCs) reinforced with nanoparticles, also termed as metal-matrix nanocomposites (MMNCs), in this case reinforced with nanoparticles of β-phase silicon carbide (β-SiC. The volume fraction ranging from 5 to 15 vol%. The yield an. The ultimate strength increase with reinforcement volume fraction up to 10 vol% nanoparticles. MMCs with micrometer-sized SiC particles have higher yield strength than their MMNC counterparts, wherea. The ultimate strength show. The opposing trend, suggesting greater strain hardening i. The MMNCs. Transmission electron microscopy shows tha. The average interparticle distance decreases with increasing SiC vol%. Recrystallization was reported as completed during sintering at 575 °C [R.D. Doherty et al., Mater. Sci. Eng. A, 238, 219 (1997)], but dislocations might be generated due to thermal expansion mismatch of Mg/SiC during cooling. The majority of Mg-grains below 20 nm remain aroun. The nanoparticles. As such a reverse volume fraction effect takes place in 15 vol% nanoparticle-reinforced MMNCs, which off set. The strengthening advantage induced b. The nanoparticles.