Recession mechanism of Lu2Si2O7 phase in high speed steam jet environment at high temperatures

The phase stability and recession mechanism of Lu2Si2O7 were examined in a high speed steam jet environment at 1300 and 1500 C for a 100 h exposure time test. After high temperature steam jet exposure, a porous microstructure was formed on the exposed surface of the samples. Microstructural analysis...

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Bibliographic Details
Published in:Ceramics international 2006, Vol.32 (7), p.775-778
Main Authors: UENO, Shunkichi, DONI JAYASEELAN, D, OHJI, Tatsuki, LIN, Hua-Tay
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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Summary:The phase stability and recession mechanism of Lu2Si2O7 were examined in a high speed steam jet environment at 1300 and 1500 C for a 100 h exposure time test. After high temperature steam jet exposure, a porous microstructure was formed on the exposed surface of the samples. Microstructural analysis indicated that the grain size of the 1500 C sample was slightly larger than that of the 1300 C sample. At 1300 C, Lu2Si2O7 completely decomposed to form a Lu2SiO5. On the other hand, both Lu2SiO5 and Lu2Si2O7 phases were seen in the 1500 C test sample. 10 refs.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2005.05.014