Corrosion behavior of Lu-Si-O system in water vapor

Zhi Liang Hong; Lai Fei Cheng; Lin Jing Lu; Li Tong Zhang; Yi Guang Wang

doi:10.3724/SP.J.1077.2010.00186

Corrosion behavior of Lu-Si-O system in water vapor

Zhi Liang Hong, Lai Fei Cheng, Lin Jing Lu, Li Tong Zhang, Yi Guang Wang^*

^*Corresponding author for this work

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

Abstract

Three kinds of lutetium silicates powders were prepared by sol-gel method, marked by Lu₂O₃·SiO₂, Lu₂O₃·2SiO₂ and Lu₂O₃·2. 26SiO₂, respectively. Their corrosion behavior in water vapor was investigated in 50%H₂O-50%O₂ steam environment with a total pressure of 1. 01×10⁵Pa at 1400°C. The specific weight change as a function of corrosion time was recorded. The phase evolution of lutetium silicate at different corrosion stages was observed by X-ray diffraction. The bonds of samples after corroded for different times were characterized by fourier transform infrared spectroscope(FTIR). The composition of corroded samples was analyzed by EDS. The results show that the main crystal phases of the as-prepared samples are Lu₂SiO₅+ Lu₂Si₂O₇, Lu₂Si₂O₇+SiO₂ and Lu₂Si₂O₇+SiO₂, respectively. Lu₂SiO₅, instead of Lu₂Si₂O₇, reacts with Al₂O₃ to form garnet phase (Lu₃Al₅O₁₂) in the water vapor environment. This indicates that Lu₂Si₂O₇ exhibits more excellent chemical stability than Lu₂SiO₅.

Original language	English
Pages (from-to)	186-190
Number of pages	5
Journal	Wuji Cailiao Xuebao/Journal of Inorganic Materials
Volume	25
Issue number	2
DOIs	https://doi.org/10.3724/SP.J.1077.2010.00186
Publication status	Published - Feb 2010
Externally published	Yes

Keywords

Environmental barrier coating (EBC)
Lu SiO
LuSiO
Water vapor corrosion

Access to Document

10.3724/SP.J.1077.2010.00186

Cite this

@article{5910a1e0b144442387f82aeb19f261ee,

title = "Corrosion behavior of Lu-Si-O system in water vapor",

abstract = "Three kinds of lutetium silicates powders were prepared by sol-gel method, marked by Lu2O3·SiO2, Lu2O3·2SiO2 and Lu2O3·2. 26SiO2, respectively. Their corrosion behavior in water vapor was investigated in 50%H2O-50%O2 steam environment with a total pressure of 1. 01×105Pa at 1400°C. The specific weight change as a function of corrosion time was recorded. The phase evolution of lutetium silicate at different corrosion stages was observed by X-ray diffraction. The bonds of samples after corroded for different times were characterized by fourier transform infrared spectroscope(FTIR). The composition of corroded samples was analyzed by EDS. The results show that the main crystal phases of the as-prepared samples are Lu2SiO5+ Lu2Si2O7, Lu2Si2O7+SiO2 and Lu2Si2O7+SiO2, respectively. Lu2SiO5, instead of Lu2Si2O7, reacts with Al2O3 to form garnet phase (Lu3Al5O12) in the water vapor environment. This indicates that Lu2Si2O7 exhibits more excellent chemical stability than Lu2SiO5.",

keywords = "Environmental barrier coating (EBC), Lu SiO, LuSiO, Water vapor corrosion",

author = "Hong, {Zhi Liang} and Cheng, {Lai Fei} and Lu, {Lin Jing} and Zhang, {Li Tong} and Wang, {Yi Guang}",

year = "2010",

month = feb,

doi = "10.3724/SP.J.1077.2010.00186",

language = "English",

volume = "25",

pages = "186--190",

journal = "Wuji Cailiao Xuebao/Journal of Inorganic Materials",

issn = "1000-324X",

publisher = "Science China Press",

number = "2",

}

TY - JOUR

T1 - Corrosion behavior of Lu-Si-O system in water vapor

AU - Hong, Zhi Liang

AU - Cheng, Lai Fei

AU - Lu, Lin Jing

AU - Zhang, Li Tong

AU - Wang, Yi Guang

PY - 2010/2

Y1 - 2010/2

N2 - Three kinds of lutetium silicates powders were prepared by sol-gel method, marked by Lu2O3·SiO2, Lu2O3·2SiO2 and Lu2O3·2. 26SiO2, respectively. Their corrosion behavior in water vapor was investigated in 50%H2O-50%O2 steam environment with a total pressure of 1. 01×105Pa at 1400°C. The specific weight change as a function of corrosion time was recorded. The phase evolution of lutetium silicate at different corrosion stages was observed by X-ray diffraction. The bonds of samples after corroded for different times were characterized by fourier transform infrared spectroscope(FTIR). The composition of corroded samples was analyzed by EDS. The results show that the main crystal phases of the as-prepared samples are Lu2SiO5+ Lu2Si2O7, Lu2Si2O7+SiO2 and Lu2Si2O7+SiO2, respectively. Lu2SiO5, instead of Lu2Si2O7, reacts with Al2O3 to form garnet phase (Lu3Al5O12) in the water vapor environment. This indicates that Lu2Si2O7 exhibits more excellent chemical stability than Lu2SiO5.

AB - Three kinds of lutetium silicates powders were prepared by sol-gel method, marked by Lu2O3·SiO2, Lu2O3·2SiO2 and Lu2O3·2. 26SiO2, respectively. Their corrosion behavior in water vapor was investigated in 50%H2O-50%O2 steam environment with a total pressure of 1. 01×105Pa at 1400°C. The specific weight change as a function of corrosion time was recorded. The phase evolution of lutetium silicate at different corrosion stages was observed by X-ray diffraction. The bonds of samples after corroded for different times were characterized by fourier transform infrared spectroscope(FTIR). The composition of corroded samples was analyzed by EDS. The results show that the main crystal phases of the as-prepared samples are Lu2SiO5+ Lu2Si2O7, Lu2Si2O7+SiO2 and Lu2Si2O7+SiO2, respectively. Lu2SiO5, instead of Lu2Si2O7, reacts with Al2O3 to form garnet phase (Lu3Al5O12) in the water vapor environment. This indicates that Lu2Si2O7 exhibits more excellent chemical stability than Lu2SiO5.

KW - Environmental barrier coating (EBC)

KW - Lu SiO

KW - LuSiO

KW - Water vapor corrosion

UR - http://www.scopus.com/inward/record.url?scp=77950566517&partnerID=8YFLogxK

U2 - 10.3724/SP.J.1077.2010.00186

DO - 10.3724/SP.J.1077.2010.00186

M3 - Article

AN - SCOPUS:77950566517

SN - 1000-324X

VL - 25

SP - 186

EP - 190

JO - Wuji Cailiao Xuebao/Journal of Inorganic Materials

JF - Wuji Cailiao Xuebao/Journal of Inorganic Materials

IS - 2

ER -

Corrosion behavior of Lu-Si-O system in water vapor

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this