Abstract
The crystallization of the glass with Ln2Si2O7-Al6Si2O13 (Ln = Y, Yb) eutectic composition were examined. In the case of Ln = Yb, both Yb2Si2O7 and Al6Si2O13 phases were crystallized simultaneously. On the other hand, in the case of Ln = Y, two step crystallization occurred. First, Y2Si2O7 phase crystallized at 1000 °C from the glass surface. In the second step, Y2Si2O7 phase and Al6Si2O13 phase crystallized at 1200 °C. Two typical microstructures were formed by a heat treatment at 1250 °C. Y2Si2O7- Al6Si2O13 eutectic microstructure was formed near the bulk surface. In contrast to the formation of eutectic microstructure, facet microstructure was formed at center of the bulk. The activation energy of the crystallization at 1000 °C for Ln = Yb sample was smaller than that of Ln = Y sample. By a heat treatment at 1350 °C for Ln = Yb sample, the sample was completely melted down and a homogeneous eutectic microstructure was formed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
