Recession behavior of Yb2Si2O7 phase under high speed steam jet at high temperatures

Recession behavior of Yb2Si2O7 phase was examined under high speed steam jet environment between 1300 deg C and 1500 deg C. Yb2SiO5 phase was formed on the bulk surface by the decomposition of Yb2Si2O7 phase and the elimination of silica component at elevated temperatures. The phase ratio of Yb2SiO5...

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Bibliographic Details
Published in:Corrosion science 2008, Vol.50 (1), p.178-182
Main Authors: UENO, Shunkichi, OHJI, Tatsuki, LIN, Hua-Tay
Format: Article
Language:English
Subjects:
Applied sciences
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
SILICA
STEAM
TRIPLE POINT
VELOCITY
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Summary:Recession behavior of Yb2Si2O7 phase was examined under high speed steam jet environment between 1300 deg C and 1500 deg C. Yb2SiO5 phase was formed on the bulk surface by the decomposition of Yb2Si2O7 phase and the elimination of silica component at elevated temperatures. The phase ratio of Yb2SiO5/Yb2Si2O7 increased up to 1400 deg C and then decreased above 1400 deg C. The relative intensity of 220 peak for Yb2Si2O7 phase increased with increasing the temperatures. Fine grains were generated on the bulk surface at 1300 deg C. The phase decomposition caused on the grain interior. A porous structure was formed on the bulk surface during the test at 1400 deg C. Surface cracks were generated for 1400 deg C test sample. A smooth surface was generated on the surface of 1500 deg C test sample. The triple points of the grains were bridged with a glassy phase.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2007.06.014