Thermal shock behavior of porous ZrB2-SiC ceramics

Xinxin Jin*, Xinghong Zhang, Jiecai Han, Ping Hu, Rujie He

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Porous ZrB2-SiC (ZS) ceramics with different microstructures were fabricated by partial hot-pressing or pressureless-sintering, in order to obtain high thermal shock damage resistance. Their thermal shock behavior was investigated by water-quenching. The influences of various microstructural characteristics: porosity, pore size and sintering degree, on mechanical properties were investigated in detail, and their effects on critical crack size, critical thermal shock temperature (δTc) and residual strength retention rate after thermal shock were also discussed. The pressureless-sintered ZS with 11% porosity had an optimum configuration of porosity and pore size, and exhibited the best combination of mechanical properties and thermal shock damage resistance. No cracks were visible under the scanning electron microscope on the surfaces of this specimen after thermal shock, showing its excellent structural stability.

Original languageEnglish
Pages (from-to)175-180
Number of pages6
JournalMaterials Science and Engineering: A
Volume588
DOIs
Publication statusPublished - 20 Dec 2013
Externally publishedYes

Keywords

  • Ceramics
  • Mechanical characterization
  • Porous materials
  • Sintering

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