Abnormal Grain Growth in Chemical Inequilibrium

Compare and explain the normal grain growth observed in a polycrystalline pure material and a material with second-phase particles, and the classically explained abnormal grain growth. [Pg.125]

For ionic compounds, what should be the values of and Vm in the grain growth equation (6.1) [Pg.125]

Consider a polycrystal with uniformly distributed second-phase particles of a fine size. What will be the variation of grain size with annealing time of the polycrystal for the following cases [Pg.125]

Consider two sintering powder compacts of the same relative density of 96% but with and without uniformly distributed second-phase particles. Compare the densification rates of the compacts. [Pg.125]

Explain the variation of solute segregation at grain boundaries with increasing temperature. Draw schematically and explain the variation in grain boundary velocity with temperature for pure, slightly impure and highly impure materials. [Pg.126]