A Molecular Dynamics Study of Sintering Process of FCC and BCC Materials

Abstract

The project presents a molecular dynamics (MD) study of the effects of sintering on BCC and FCC materials. The BCC material taken was Tungsten (W) and the FCC material was Copper (Cu). In the MD simulations 2, 4, 6- particle models of the material were created and were then subjected to different conditions of sintering. During the modeling of the sintering procedure different parameters were employed to achieve the results. LAMMPS ((Large-scale Atomic/Molecular Massively Parallel Simulator) was employed to simulate the model. The model was subjected to pressurized and pressureless sintering conditions at different temperatures varying from 1000 K to 3500 K for tungsten, and 300 K to 1000 K for copper. Different heating rates were also employed on the model to study the effects of sintering on the material. Pressure had an effect on the sintering temperature, as the pressure was increased the sintering temperature required decreased. The effect of sintering on the density of the material was also analysed and has been discussed in the project. The neck growth and shrinkage has also been calculated so as to reveal its effects on the physical properties. With a variation in temperature and pressure the effects on densification and grain growth was studied. The effect of sintering temperature on the crystallinity of the material was also studied. These properties have been discussed in the project.