SYNTHESIS AND CHARACTERIZATION OF MULLITE AND YAG FIBERS GROWN FROM DEEPLY UNDERCOOLED MELTS

摘要

Mullite (3Al_2O_3 centre dot 2SiO_2) and YAG (Y_3Al_5O_(12)) fibers were pulled out from deeply undercooled melts using a CO_2 laser. The as-pulled fibers were amorphous. The tensile strengths and microstructures of mullite fibers were examined before and after recrystallization. The fracture behavior and composition distribution of YAG fiber on fracture surfaces were observed using SEM and EDS.