Fabrication of ebc system with oxide eutectic structure

Shunkichi Ueno, Kyosuke Seya, Byungkoog Jang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, the fabrication method and the formation mechanism of a new EBC system with Al2O3-HfO2 eutectic structure are discussed. A rapid heating process is required for the fabrication of Al2O3-HfO2 eutectic EBC film on silicon carbide substrate. Optical zone melting method was applied for the fabrication method of the eutectic EBC film. At high temperature under light focusing, a small amount of silicon carbide decomposed into silicon and carbon and each component of the Al2O3 and HfO2 in molten phase reacts with the free carbon. And a small amount of A2O3 component reacts with the free carbon and vaporized from the molten phase. The composition of the molten phase becomes HfO2 rich. HfO2 phase is also reacts with die free carbon and HfC phase is solidified on the silicon carbide substrate. A high density intermediate layer consisted of HfC is formed. When the solidification process finished before all of HfO2 phase is reduced to HfC phase, HfC-HfO2 functionally graded layer is formed on the silicon carbide substrate. The Al2O3-HfO2: eutectic structure grows from the top of the intermediate layer.

Original languageEnglish
Title of host publicationAdvanced and Refractory Ceramics for Energy Conservation and Efficiency
PublisherAmerican Ceramic Society
Pages65-72
Number of pages8
ISBN (Electronic)9781119234586
Publication statusPublished - Jan 1 2016
Externally publishedYes
EventAdvanced and Refractory Ceramics for Energy Conservation and Efficiency - 11th International Symposium on Ceramic Materials and Components for Energy and Environmental Applications, CMCEE 2015 - Vancouver, Canada
Duration: Jun 14 2015Jun 19 2015

Publication series

NameCeramic Transactions
Volume256
ISSN (Print)1042-1122

Other

OtherAdvanced and Refractory Ceramics for Energy Conservation and Efficiency - 11th International Symposium on Ceramic Materials and Components for Energy and Environmental Applications, CMCEE 2015
CountryCanada
CityVancouver
Period6/14/156/19/15

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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  • Cite this

    Ueno, S., Seya, K., & Jang, B. (2016). Fabrication of ebc system with oxide eutectic structure. In Advanced and Refractory Ceramics for Energy Conservation and Efficiency (pp. 65-72). (Ceramic Transactions; Vol. 256). American Ceramic Society.