Fracture of multilayer oxide composites

Dong Hau Kuo, Waltraud M. Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Ceramics with high strength and damage tolerance have been realized in the well-recognized non-oxide systems, e.g. silicon carbide/graphite and silicon carbide/boron nitride laminates. All-oxide systems without compliant materials functioning as do graphite and boron nitride are still facing the problem of catastrophic failure. In this study, ten kinds of multilayered, all-oxide laminates fabricated by a low-cost tape casting technique were evaluated. These materials were yttrium phosphate (YPO4)- and lanthanum phosphate (LaPO4)-containing zirconia (ZrO2) laminates, and aluminum phosphate (AlPO4)-containing alumina (Al2O3) laminates. A YPO4-containing ZrO2 laminate demonstrated excellent strength and improved damage tolerance. A LaPO4-containing ZrO2 laminate also displayed a satisfactory result. An AlPO4/Al2O3 laminate was weak. The AlPO4/Al2O3 laminate was strengthened by reinforcing AlPO4 layers with Al2O3, while retaining non-brittle fracture. Different flexural behaviors in different oxide laminates were discussed.

Original languageEnglish (US)
Pages (from-to)241-250
Number of pages10
JournalMaterials Science and Engineering A
Volume241
Issue number1-2
DOIs
StatePublished - Jan 1998

Keywords

  • Alumina
  • Aluminum phosphate
  • Laminate
  • Lanthanum phosphate
  • Mechanical property
  • Yttrium phosphate
  • Zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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