Molten glass corrosion resistance of immersed combustion-heating tube materials in soda-lime-silicate glass
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Materials Science and Engineering
The corrosion resistance of molybdenum, molybdenum disilicide, and a SiC[sub (p)]/Al[sub 2]O[sub 3] composite to molten soda-lime-silicate glass was studied. The ASTM-C621-84 corrosion test method was modified because of inherent inaccuracies in the method and Si attack of platinum crucibles. Specimen-glass interfacial regions were characterized using XRD, SEM, and EDS. After 48 h of exposure at 1,565 C, the half-down corrosion recessions of Mo, MoSi[sub 2], and SiC[sub (p)]/Al[sub 2]O[sub 3] were 0.11, 0.316, and 0.26 mm, respectively. Mo oxidized to form a MoO[sub 2] surface scale which cracked, allowing glass seepage and further oxidation. Silicon was leached out of MoSi[sub 2] into the glass, leaving a Mo[sub 5]Si[sub 3] interface and particles of Mo near the interface. For the SiC[sub (p)]/Al[sub 2]O[sub 3] composite, bubbles observed at the interfacial regions formed from oxidation of SiC to form CO. Thermodynamic modeling corroborated these experimental observations. The work discussed herein is part of a larger research thrust to develop materials for immersed gas-fired radiant burner tubes for glass melters.
- OSTI ID:
- 7072744
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 77:6; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
Similar Records
Use of plasma spraying in the manufacture of continuously graded and layered/graded molybdenum disilicide/alumina composites
Molybdenum disilicide composites produced by plasma spraying
Related Subjects
03 NATURAL GAS
ALUMINIUM OXIDES
CORROSION RESISTANCE
COMPOSITE MATERIALS
GAS BURNERS
MATERIALS
GLASS
CORROSIVE EFFECTS
MOLYBDENUM
MOLYBDENUM SILICIDES
SILICON CARBIDES
CORROSION PRODUCTS
LIQUIDS
MATHEMATICAL MODELS
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ALUMINIUM COMPOUNDS
BURNERS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
FLUIDS
METALS
MICROSCOPY
MOLYBDENUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
SCATTERING
SILICIDES
SILICON COMPOUNDS
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion
360604 - Materials- Corrosion
Erosion
& Degradation
034000 - Natural Gas- Combustion