Strain induced recrystallization in lanthanum zirconate ceramic

The focus of this work is to investigate the strain-induced recrystallization behavior on the surface of La 2 Zr 2 O 7 ceramic through annealing. Unlike in metallic materials, the recrystallization phenomenon resulting from surface mechanical treatment in ceramics has not been extensively explored. In this study, we examine the strain-induced recrystallization in La 2 Zr 2 O 7 that has undergone surface deformation and subsequent annealing at different temperatures. It reveals the presence of recrystallized grains in the region of the surface that was deformed, following the annealing process. To better understand the driving force for the recrystallization behavior, we analyze the variation of stored deformation energy in La 2 Zr 2 O 7 using Raman spectroscopy. The study also highlights the microstructural evolution, revealing that shear bands, characterized by a high density of dislocations, serve as preferential sites for the nucleation of recrystallized grains. Finally, we discuss the mechanism of strain-induced recrystallization in ceramic materials.