Microstructural evolutions of ceramic grain growth at atomistic scale were modeled. The simulation was preceded with Monte-Carlo method, using Visual C++ and OpenGL languages. Realistic images in series were monitored...Microstructural evolutions of ceramic grain growth at atomistic scale were modeled. The simulation was preceded with Monte-Carlo method, using Visual C++ and OpenGL languages. Realistic images in series were monitored both in two d imensions and three dimensions. Simulated image of grain growth in this series i s presented in left figure with N 0=25, r=0.40 nm, α=0.1, T=1 300 ℃, and P 0=50 %. It was seen that the average grain size increases wit h the time of grain growth. It is in good agreement with that of practical BST c eramics. The average grain area versus grain growth time is shown in right figur e. It is clear that the kinetic exponents of grain growth are not constant durin g the process of microstructural evolution. The kinetic exponents are smaller ( m≈0.5) at the early stages of growth and larger (m≈8) at the later sta ges, which are in agreement with reported results.展开更多
文摘Microstructural evolutions of ceramic grain growth at atomistic scale were modeled. The simulation was preceded with Monte-Carlo method, using Visual C++ and OpenGL languages. Realistic images in series were monitored both in two d imensions and three dimensions. Simulated image of grain growth in this series i s presented in left figure with N 0=25, r=0.40 nm, α=0.1, T=1 300 ℃, and P 0=50 %. It was seen that the average grain size increases wit h the time of grain growth. It is in good agreement with that of practical BST c eramics. The average grain area versus grain growth time is shown in right figur e. It is clear that the kinetic exponents of grain growth are not constant durin g the process of microstructural evolution. The kinetic exponents are smaller ( m≈0.5) at the early stages of growth and larger (m≈8) at the later sta ges, which are in agreement with reported results.
