Lecture
This lecture covers the different types of defects in materials, including point defects like vacancies and interstitial atoms, dislocations, grain boundaries, and misfit dislocations. It also discusses the importance of grain boundary networks in material behavior, the kinetics of grain coarsening, and the glass transition phenomenon. The instructor explains the creation of vacancies through various methods such as quenching and irradiation, as well as the measurement and concentration of vacancies at thermodynamic equilibrium. Additionally, the lecture delves into topics like amorphous materials, quasicrystals, fractals, and void formation due to electron irradiation in nanotwinned copper.