Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Theses/Dissertations

Chemical engineering

Biomedical Engineering and Bioengineering

2008

Articles 1 - 1 of 1

Full-Text Articles in Engineering

Slurry Based Coatings On Silicon Based Ceramics, Sameer K. Khaja-Abdul Jan 2008

Slurry Based Coatings On Silicon Based Ceramics, Sameer K. Khaja-Abdul

ETD Archive

The use of advanced structural ceramics, such as Si3N4 (SN282), SiC, and SiC/SiC composites, is a promising technology to accomplish the high performance goals for advanced turbine applications. These materials exhibit excellent corrosion resistance by forming a dense silica scale. However, severe degradation of the silica scale has been observed due to the presence of certain environmental species, like alkali salts and water vapors, limiting the long-term reliability of structural ceramics. Presence of water vapor in the turbine environment leads to the formation of a gaseous silicon hydroxide species (Si(OH)4) via a reaction with silica layer, SiO2 ...