|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||2022 Technical Division Student Poster Contest
||SPU-10: Correlating Grain Boundary Energy to Abnormal Grain Growth Using Atomic Force Microscopy
||Molly Kole, Bryan M Conry, Prabal Tiwari, William R Burnett, Amanda R Krause
|On-Site Speaker (Planned)
Abnormal grain growth (AGG) is a phenomenon in which a fraction of grains grow faster than their neighbors leading to bimodal grain size distribution. Concurrent work has revealed that AGG is suppressed in textured alumina. It is hypothesized that texturing samples reduces overall AGG by greatly increasing the fraction of preferentially oriented grain boundaries, reducing the overall driving force for AGG. In this study, CaO-doped alumina was slip cast in a magnetic field to induce crystallographic texturing, and heat treated out of the field for different time periods at 1600˚C. Atomic force microscopy is employed to measure the dihedral angle of thermally etched grain boundaries, which can then be used to determine relative grain boundary energy. This investigation will compare microstructural evolution and corresponding relative grain boundary energies in identically processed textured and non-textured alumina.