Articles
  • Characterization of sintered silicates for environmental barrier coating materials
  • Fan Jie Fenga, Dong Heon Leea, Ji Yeon Parkb and Kee Sung Leea,*
  • a School of Mechanical Systems Engineering, Kookmin University, Seoul, 02707, Korea b Nuclear Materials Development Division, Korea Atomic Energy Research Institute, Daejeon, 34057, Korea
Abstract
In this study, sintered silicates such as Yb2SiO5, Gd2SiO5, mullite, Ba-Sr-Al silicate (BSAS), and Y2SiO5 are fabricated and characterized. The oxide silicates are considered environmental barrier coating materials for protecting Si-based ceramic substrates in gas turbine applications from oxidation and corrosion resulting from reactions with water vapor at high temperature. Microstructure observation, phase analysis, and mechanical properties measurements indicate that the heattreated Yb2SiO5 material includes crystalline phases, and it shows a relatively dense microstructure with improved mechanical properties.

Keywords: Environmental Barrier Coating, Gas Turbine, Mechanical properties, Microstructure, Phase analysis, Rare-earth doped silicates.

This Article

  • 2016; 17(1): 11-16

    Published on Jan 31, 2016