Details
| Original language | English |
|---|---|
| Pages (from-to) | 2887-2894 |
| Number of pages | 8 |
| Journal | Journal of the American Ceramic Society |
| Volume | 89 |
| Issue number | 9 |
| Early online date | 1 Aug 2006 |
| Publication status | Published - Sept 2006 |
Abstract
2/1-mullite single crystal (001) plates with thicknesses between 0.9 and 1.9 mm were exposed for 1.5, 3, 6, and 12 h at 1670°C to a slowly flowing (100 mL/min) water-rich gas mixture (O2/H2O 80/20). Under the given experimental conditions, 2/1-mullite yielded significant amounts of structurally bound OH groups across the bulk and decomposition of the crystal surface on a micrometer scale. Decomposition products are (i) sodium-containing silicon-rich alumino silicate glass formed from melt and (ii) α-alumina, which crystallizes within melt cavities. The crystal plates that are free of any OH absorption before the corrosion experiments show a steep increase in OH absorption intensity up to 3 h of corrosion and a flattening toward longer times of exposure. The evaluation of OH intensity profiles implies an effective diffusion coefficient DH in the range between 1.5 and 2.5 × 10-7 cm2/s.
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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In: Journal of the American Ceramic Society, Vol. 89, No. 9, 09.2006, p. 2887-2894.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-temperature hydroxylation and surface corrosion of 2/1-mullite single crystals in water vapor environments
AU - Eils, Nadine
AU - Rüscher, Claus H.
AU - Shimada, Shiro
AU - Schmücker, Martin
AU - Schneider, Hartmut
PY - 2006/9
Y1 - 2006/9
N2 - 2/1-mullite single crystal (001) plates with thicknesses between 0.9 and 1.9 mm were exposed for 1.5, 3, 6, and 12 h at 1670°C to a slowly flowing (100 mL/min) water-rich gas mixture (O2/H2O 80/20). Under the given experimental conditions, 2/1-mullite yielded significant amounts of structurally bound OH groups across the bulk and decomposition of the crystal surface on a micrometer scale. Decomposition products are (i) sodium-containing silicon-rich alumino silicate glass formed from melt and (ii) α-alumina, which crystallizes within melt cavities. The crystal plates that are free of any OH absorption before the corrosion experiments show a steep increase in OH absorption intensity up to 3 h of corrosion and a flattening toward longer times of exposure. The evaluation of OH intensity profiles implies an effective diffusion coefficient DH in the range between 1.5 and 2.5 × 10-7 cm2/s.
AB - 2/1-mullite single crystal (001) plates with thicknesses between 0.9 and 1.9 mm were exposed for 1.5, 3, 6, and 12 h at 1670°C to a slowly flowing (100 mL/min) water-rich gas mixture (O2/H2O 80/20). Under the given experimental conditions, 2/1-mullite yielded significant amounts of structurally bound OH groups across the bulk and decomposition of the crystal surface on a micrometer scale. Decomposition products are (i) sodium-containing silicon-rich alumino silicate glass formed from melt and (ii) α-alumina, which crystallizes within melt cavities. The crystal plates that are free of any OH absorption before the corrosion experiments show a steep increase in OH absorption intensity up to 3 h of corrosion and a flattening toward longer times of exposure. The evaluation of OH intensity profiles implies an effective diffusion coefficient DH in the range between 1.5 and 2.5 × 10-7 cm2/s.
UR - http://www.scopus.com/inward/record.url?scp=33747596435&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2006.01170.x
DO - 10.1111/j.1551-2916.2006.01170.x
M3 - Article
AN - SCOPUS:33747596435
VL - 89
SP - 2887
EP - 2894
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 9
ER -