Atomistic Investigation of the Effects of Different Reinforcements on Al Matrix Composite

In this work, we studied the effects of different reinforcements on a metal matrix composite (MMC) using molecular dynamics (MD) simulations, where graphene was chosen as two-dimensional (2D) material and diamond selected three-dimensional (3D) material. Sintering tensile processes were conducted MMC models containing various sizes, with same surface area compared. The results indicated that 2D more beneficial for sintering at heating stage, producing higher-density structure. volume Al atoms fell from 752 to 736 nm3 size in system increased. However, slight increase 749 755 observed when radius small. Converted relevant metrics experiments, density reached 2.84 g/cc 3.3 wt.% addition single-layer (SLG) 2.87 15.4 diamond, slightly higher than experimental reports. Both SLG could reduce number arranged 43,550 approximately 35,000, bilayer (BLG) largest further decrease nearly 30,000, implying grain refinement be obtained by increasing reinforcements. Considering scale these models, reinforcement pore location initial structures deemed have an impact mechanical properties. proportion showed 1.6 GPa strength; however, BLG significant drop 1.9 stretched normal direction, large interlayer space acted hole tension. did not appear affect strengthening effects. Nevertheless, elongation values composites generally 35% Al-diamond composites.