Development of protective coatings for ceramic tubular components. Topical report, March 1986-December 1987

Technical Report · Tue Dec 01 04:00:00 EST 1987

OSTI ID:7257145

van Roode, M; Price, J R

Process technology was developed for the deposition of adherent ceramic oxide coatings on silicon-based substrates for corrosion protection of ceramic heat-exchanger tubes operating in aluminum remelters. Single- and multi-layer coatings of mullite, zircon, alumina, yttria, and yttria-stabilized zirconia remained adherent and intact after isothermal heat treatment at 1093/sup 0/C/120 hours followed by cyclic heat treatment between 1010/sup 0/C and 371/sup 0/C (60 one hour cycles). Ten optimized coating compositions were deposited on alpha-SiC and SCRB-210 tubes for environmental-exposure testing in a simulated aluminum-remelt environment. An aluminum-reclamation simulator was designed, constructed, and installed under the program. A computer simulation study was undertaken to characterize the gas-phase chemistry in the aluminum remelt environment and to predict the nature of the corrosion products at the silicon-based tube surfaces. Mechanical properties of coated and uncoated tube specimens were determined.

• Research Organization: Solar Turbines, Inc., San Diego, CA (USA)
• OSTI ID: 7257145
• Report Number(s): PB-88-197165/XAB; SR-87-R-5334-12
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
CERAMICS
COATINGS
CORROSION INHIBITORS
DOCUMENT TYPES
ENERGY RECOVERY
HEAT EXCHANGERS
HEAT RECOVERY
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MULLITE
OXIDE MINERALS
OXYGEN COMPOUNDS
PROGRESS REPORT
PROTECTIVE COATINGS
RECOVERY
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SUBSTRATES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
TUBES
ZIRCON
ZIRCONIUM COMPOUNDS
ZIRCONIUM SILICATES