Preparing dense Yb2SiO5 sintered bodies from YbSiO powder synthesized by the polymerizable complex method and appropriate calcination

Taishi Yokoi, Hideaki Matsubara, Takuto Kamitani, Sota Terasaka, Masanobu Kamitakahara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

SiC fiber-reinforced SiC matrix composite (SiCf/SiCm) is one of the most promising materials for application in hot section components of gas turbine engines. However, due to the insufficient chemical durability of SiCf/SiCm under combustion environment, environmental barrier coating (EBC) is required as a protective coating on SiCf/SiCm surfaces. To determine the suitable materials for EBC, a synthetic process of ceramic powders with excellent compositional controllability should be established, and its calcination and sintering conditions should be determined to allow the preparation of a dense sintered body. Since ytterbium silicates are promising materials as an EBC, in this study, we investigated the synthesis of a precursor polyester containing Yb and Si components through the polymerizable complex (PC) method, which could achieve compositional homogeneity of the obtained oxide powder, as well as the dependence of the densification behavior of YbSiO powder prepared by the calcination of the precursor polyester on calcination temperatures and periods. We successfully obtained a single-phase Yb2SiO5 sintered body using the YbSiO powder prepared by the calcination of the precursor polyester synthesized using the PC method. In terms of calcination conditions, calcination at 8001100 °C for 24 h and at 11001400 °C for 1 h were considered appropriate to obtain dense Yb2SiO5 sintered body with a relative density of <95% at the sintering condition with 1700 °C for 5 h.

Original languageEnglish
Pages (from-to)118-122
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume130
Issue number1
DOIs
Publication statusPublished - 2022 Jan 1

Keywords

  • Calcination
  • Environmental barrier coatings
  • Polymerizable complex method
  • Sintering
  • Yb2SiO5

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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