Thermal shock resistance of porous ceramic foams with temperature-dependent material properties

Yunxia Zhang, Kaifa Wang, Baolin Wang, Cheng Zhang

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The impact of temperature dependence of material properties on thermal shock resistance of porous ceramic foams is studied in this paper. Two cases of thermal shock are carried out: sudden heating and sudden cooling. Finite difference method and weight function method are employed to get the thermal stress field at crack tip. The effects of time dependence and temperature dependence of material properties on thermal shock behavior are analyzed. The thermal shock resistance is acquired based on two different criteria: fracture mechanics criterion and stress criterion. By comparison analysis, results show that taking temperature dependence of the material properties into account is crucial in the assessment of thermal shock resistance of ceramic foams. Cold shock fracture experiments of Al2O3 foams with different relative densities are also made, and the obtained results are in coincidence with theoretical results very well.
Original languageEnglish
Pages (from-to)1503-1511
Number of pages9
JournalCeramics International
Volume46
Issue number2
DOIs
Publication statusPublished - 2020

Keywords

  • finite differences
  • high temperatures
  • porous materials
  • thermal stresses

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