Corrosion and its effect on mechanical properties of materials for advanced combustion systems
- Argonne National Lab., IL (United States)
- Pittsburgh Energy Technology Center, Pittsburgh, PA (United States)
Conceptual designs of advanced combustion systems that utilize coal as a feedstock require high-temperature furnaces and heat transfer surfaces that can operate at temperatures much higher than those prevalent in current coal-fired power plants. The combination of elevated temperatures and hostile combustion environments necessitates development and application of advanced ceramic materials in these designs. The objectives of the present program are to evaluate (a) the chemistry of gaseous and condensed products that arise during combustion of coal; (b) the corrosion behavior of candidate materials in air, slag and salt environments for application in the combustion environments; and (c) the residual mechanical properties of the materials after corrosion. The program emphasizes temperatures in the range of 1000-1400{degrees}C for ceramic materials and 600-1000{degrees}C for metallic alloys. Coal/ash chemistries developed on the basis of thermodynamic/kinetic calculations, together with slags from actual combustors, are used in the program. The materials being evaluated include monolithic silicon carbide from several sources: silicon, nitride, silicon carbide in alumina composites, silicon carbide fibers in a silicon carbide- matrix composite, and some advanced nickel-base alloys. The paper presents results from an ongoing program on corrosion performance of candidate ceramic materials exposed to air, salt and slag environments and their affect on flexural strength and energy absorbed during fracture of these materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 368390
- Report Number(s):
- ANL/ET/CP-89767; CONF-9605167-11; ON: DE96012813
- Resource Relation:
- Conference: 10. annual conference on fossil energy materials, Knoxville, TN (United States), 14-16 May 1996; Other Information: PBD: May 1996
- Country of Publication:
- United States
- Language:
- English
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Corrosion performance of ceramic materials in slagging environments
High-temperature corrosion in advanced combustion systems
Related Subjects
01 COAL, LIGNITE, AND PEAT
COAL
COMBUSTION PRODUCTS
CORROSIVE EFFECTS
SILICON CARBIDES
CORROSION
SILICON NITRIDES
ALUMINIUM OXIDES
NICKEL BASE ALLOYS
COMBUSTORS
DESIGN
CERAMICS
COMBUSTION
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TESTING