Mechanical Response of ZrB2–SiC–ZrO2 Composite Laminate

A. G. Burlachenko, Yu A. Mirovoi, E. S. Dedova, S. P. Buyakova

Research output: Contribution to journalArticle

Abstract

The paper deals with heat-reflecting ZrB2–20% SiC ceramic composite and heat-reflecting ZrB2–20% SiC composite laminate with ZrO2 addition, the amount of which varies from 0 to 100%. Their properties and behavior are studied under the conditions of three-point bending and diametral compressive tests. The increased amount of ZrO2 in the composite layers notably reduces the elastic modulus and increases the thermal-expansion coefficient. It is found that in the composite laminate layer adjacent to that with lower thermal-expansion coefficient and in the layer adjacent to that with higher thermal-expansion coefficient, compressive and tensile residual stresses appear, respectively. The hardness in the region of compressive stress is higher than in the region of tensile stress. The texture of the broken specimen surface indicates that the main crack bifurcation occurs at the interface of the layers with 30 and 70% ZrO2 content and the greater difference in the thermal-expansion coefficient, regardless of the loading conditions of three-point bending. The fracture energy of ZrB2–SiC–ZrO2 composite laminate significantly exceeds that of ZrB2–20% SiC ceramic composite.

Original languageEnglish
Pages (from-to)1438-1444
Number of pages7
JournalRussian Physics Journal
Volume62
Issue number8
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • compressive and tensile residual stresses
  • fracture
  • heat-reflecting composite laminate

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Mechanical Response of ZrB<sub>2</sub>–SiC–ZrO<sub>2</sub> Composite Laminate'. Together they form a unique fingerprint.

  • Cite this