The behavior of grain boundary sliding in yttrium-doped alumina bicrystals was measured at high temperatures using bicrystals. Al2O3 bicrystals containing a random grain boundary with or without yttrium ions was fabricated. Microscopic and spectroscopic analysis showed that bicrystals were successfully joined at an atomic scale, and doped yttrium ions segregated along the grain boundaries. It was found that by using compressive creep tests the grain boundary sliding rate was restrained by two orders of magnitude due to yttrium addition compared to undoped bicrystals.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)