Oxide laminated composites with aluminum phosphate (AlPO4) and alumina platelets as crack deflecting materials

Dong Kyu Kim, Waltraud M. Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Oxide-oxide laminated composites with aluminum phosphate (AlPO4) and alumina platelets as crack deflecting interphases were developed by the tape casting method. Dense bodies of Al2O3, mullite, 50 vol% Al2O3·50 vol% YAG in situ composite, and 3Y-TZP were sintered and characterized. Tape casting formulations for different oxides with solid contents of 25.1 and 30 vol%, respectively, were developed. XRD indicated compatibility between alumina, mullite, zirconia and AlPO4. Laminated, matrix-interphase composite systems consisting of Al2O3-AlPO4, mullite-AlPO4, 50 vol% Al2O3·50 vol% YAG in situ composite-AlPO4, and 50 vol% Al2O3·50 vol% YAG in situ composite-alumina platelets were made. The 50 vol% Al2O3·50 vol% YAG in situ matrix-alumina platelet composite showed 'quasi-elastic' load-displacement behavior under the conditions of fabrication, and had a 3-point bending strength and work of fracture of 188±8 MPa and 0.65±0.02 kJ/m2, respectively. The 3Y-TZP-AlPO4 laminated composite could not be made because of delamination due to thermal expansion mismatch.

Original languageEnglish (US)
Pages (from-to)509-514
Number of pages6
JournalComposites Part B: Engineering
Volume37
Issue number6
DOIs
StatePublished - 2006

Keywords

  • Alumina platelets
  • Aluminum phosphate
  • Bending strength
  • Laminated composites
  • Tape casting

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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