Hot-salt induced degradation of a high strength silicon nitrideFunded under: JRC-ADVMAT 2C
Advanced engineering ceramics are attractive alternatives to metallic superalloys in the design and construction of engineering components operating in combustion processes at very high temperatures. Impurities contained in fuels and ingested air may threaten the protective nature of the surface oxide in combustion conditions. The corrosion behaviour of a high strength, hot pressed Si(3)N(4) was studied in a burner rig combustion environment. In the temperature range 1000 C to 1150 C, the corrosion process was influenced by the presence of sodium and sulphur, derived from impurities in the gas stream. Corrosion product morphologies are related to the temperature of exposure and measured reaction kinetics. A limited study on the effects of corrosion on mechanical properties is also reported.
Bibliographic Reference: Paper presented: Silicon Nitride '93, Stuttgart (DE), October 4-6, 1993
Availability: Available from (1) as Paper EN 37762 ORA
Record Number: 199311323 / Last updated on: 1994-11-28
Original language: en
Available languages: en