Open AccessInvestigation on the leading phase of Al 2 O 3 /YAG eutectic crystals prepared by directional solidification
Author(s) -
Zhong Yujie,
Wang Shengjie,
Liu Yangru,
Gao Qian,
Wang Kuikui,
Wang Xu
Publication year - 2020
Publication title -
international journal of ceramic engineering and science
Language(s) - English
Resource type - Journals
ISSN - 2578-3270
DOI - 10.1002/ces2.10055
Subject(s) - eutectic system , materials science , supercooling , phase (matter) , wetting , metal , directional solidification , metallurgy , thermodynamics , crystallography , microstructure , composite material , chemistry , organic chemistry , physics
Abstract The leading phase of eutectic materials has an effect on the solidification behavior and further influences on their properties. Many studies have been carried out on the leading phase of metal/metal and nonmetal/metal eutectic alloys. Nevertheless, few studies were focused on no‐metal/no‐metal eutectic materials. In the present work, the leading phase in the Al 2 O 3 /Y 3 Al 5 O 12 eutectic crystal during solidification was investigated by electron back‐scattered diffraction and discussed according to the classical solidification theory. It is observed that the Y 3 Al 5 O 12 was the leading phase. The leading phase was determined by the wetting angle and the undercooling. At a given wetting angle, the Y 3 Al 5 O 12 would be the leading phase when the undercooling exceeds the critical value.