Preparation of crystalline ytterbium disilicate environmental barrier coatings using suspension plasma spray

Ho lim Ryu, Sung Min Lee, Yoon Soo Han, Kyun Choi, Gye Seok An, Sahn Nahm, Yoon Suk Oh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In high-speed modern industries, high-temperature stability of materials is essential. A promising high-temperature material currently attracting attention is silicon carbide (SiC)-based ceramic matrix composites (CMC). However, a disadvantage of these materials is their reduced lifetime in an oxidizing atmosphere. To overcome this, environmental barrier coating can be employed. In this study, we aimed to fabricate an environmental barrier coating using suspension plasma spray with Yb2Si2O7, which exhibits excellent oxidation resistance and a similar thermal expansion coefficient to SiC. To prepare the crystalline Yb2Si2O7 coating layer, the gas concentration of the plasma spray was adjusted, and then the suspension manufacturing solvent was adjusted and sprayed. The prepared coating samples were analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscopes, and energy dispersive X-ray spectroscopy to determine phase and microstructure changes. Highly crystalline ytterbium disilicate was observed at low plasma enthalpy with no hydrogen and 20% addition of water.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2018 Jan 1

Keywords

  • Ceramic matrix composite
  • Environmental barrier coatings
  • Silicon carbide
  • Suspension plasma spray

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Preparation of crystalline ytterbium disilicate environmental barrier coatings using suspension plasma spray'. Together they form a unique fingerprint.

  • Cite this