Abstract
Chemical composition, structure and distribution of secondary phases in two kinds of monolithic SiC ceramics fabricated by liquid phase sintering with SiC nano-powder and 6 or 9 wt.% sintering additives of Al2O3 and Y2O3 were investigated. The major secondary phase in both samples was identified as crystalline yttrium aluminum garnet (YAG) by XRD pattern. EPMA-WDS analysis revealed that the sample containing 9 wt.% additives had the relatively distinct Y-rich and Al-rich regions, by contrast with relatively-homogeneous distribution of the additives elements in the sample containing 6 wt.% additives. The dominating secondary phases at triple junctions of YAG for Y-rich regions and Al2O3 for Al-rich regions in SiC (9 wt.% additives) were identified by TEM-EELS analysis. In SiC (6 wt.% additives), the dominating YAG was observed at triple junctions. High-resolution TEM revealed that amorphous films with content Y, Al and O existed at both the SiC-SiC and SiC-YAG grain boundaries.
Original language | English |
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Title of host publication | Ceramic Materials for Energy Applications - A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, ICACC |
Pages | 53-61 |
Number of pages | 9 |
Volume | 32 |
Edition | 9 |
Publication status | Published - 2011 Nov 7 |
Externally published | Yes |
Event | Ceramic Materials for Energy Applications - 35th International Conference on Advanced Ceramics and Composites, ICACC - Daytona Beach, FL, United States Duration: 2011 Jan 23 → 2011 Jan 28 |
Other
Other | Ceramic Materials for Energy Applications - 35th International Conference on Advanced Ceramics and Composites, ICACC |
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Country/Territory | United States |
City | Daytona Beach, FL |
Period | 11/1/23 → 11/1/28 |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry