Thermodynamic stability and mechanical evaluation of YSZ-WC composite ceramics fabricated by pressureless sintering and hot pressing

Jae Hyeong Choi, Min Soo Nam, Sung Soo Ryu, In Ho Jung, Sahn Nahm, Seongwon Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Yttria-stabilized zirconia (YSZ)-based engineering ceramics are manufactured by adding non-oxide additives as the typical toughening mechanism of zirconia (ZrO2). In this study, YSZ-10/20 vol% WC composite ceramics were prepared by pressureless sintering and hot pressing to view reaction pathways based on different driving forces. During the reactions, the decarburization of WC and the formation of ZrC were investigated at temperatures of ≥1500 °C. W was detected at 1700 °C, which is related to the thermodynamic stability of various chemical reactions in the ZrO2-WC binary system. The hardness of the composite ceramics decreased, whereas the fracture toughness and wear resistance increased. The phase evaluation and reaction pathways from the thermodynamic perspective derived from the YSZ-WC binary system suggest considerable potential for the future composition designs of ZrO2-based non-oxide composite ceramics.

Original languageEnglish
Pages (from-to)13414-13424
Number of pages11
JournalCeramics International
Volume49
Issue number9
DOIs
Publication statusPublished - 2023 May 1

Bibliographical note

Funding Information:
This study was supported by the Technology Innovation Program [grant number 20011007 ; Development of highly tough ceramic parts of 30 μm bead mill system] funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea).

Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.

Keywords

  • Crystalline phase
  • Mechanical property
  • Sintering
  • Thermodynamic stability
  • YSZ-WC

ASJC Scopus subject areas

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

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