Three-dimensional observation of the entangled eutectic structure in the Al2O3-YAG system

The coupled growth zone of the Al2O3--YAG eutectic system was examined by means of high resolution X--ray tomography. The entangled eutectic structure was observed for the unidirectional solidification and the solidification from the undercooled melt at the equilibrium eutectic composition (Al2O3--1...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2005, Vol.25 (8), p.1397-1403
Main Authors: YASUDA, Hideyuki, OHNAKA, Itsuo, MIZUTANI, Yoshiki, MORIKAWA, Takashi, TAKESHIMA, Satoshi, SUGIYAMA, Akira, WAKU, Yoshiharu, TSUCHIYAMA, Akira, NAKANO, Tsukasa, UESUGI, Kentaro
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Cermets, ceramic and refractory composites
Chemical industry and chemicals
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Other materials
Physics
Specific materials
Structural ceramics
Technical ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The coupled growth zone of the Al2O3--YAG eutectic system was examined by means of high resolution X--ray tomography. The entangled eutectic structure was observed for the unidirectional solidification and the solidification from the undercooled melt at the equilibrium eutectic composition (Al2O3--18*5mol% Y2O3). The reconstructed three--dimensional images showed that both the Al2O3 and the YAG phases branched and that the entangled domain was of the same order as the lamellar spacing. Comparison of the branching in the Al2O3--YAG eutectic system to that in metallic alloys that exhibit the regular or the irregular eutectic structure indicated that the frequent branching of both phases resulted in the entangled structure.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2005.01.019