Fabrication and Testing of Corrosion Resistant Coatings
The susceptibility of SiC and Si3N4 to sodium corrosion mandates that corrosion resistant coatings be developed to protect silicon-based turbine engine components. Materials with good corrosion resistance and thermal expansions that nearly match SiC and Si3N4 have been identified. Corrosion testing of hot-pressed pellets of these compounds has identified the most promising materials. Development of chemical vapor deposition systems to apply these materials has been initiated.
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