Microstructure and mechanical response of lanthanum phosphate/yttrium aluminate and yttrium phosphate/yttrium aluminate systems

Dong Hau Kuo, Waltraud M. Kriven

Research output: Contribution to journalConference article

Abstract

The use of lanthanum phosphate (LaPO4) and yttrium phosphate (YPO4) as weak interfaces in composites for high temperature applications was investigated using tape-cast laminates. Interfacial delamination occurred in the YPO4/Y3Al5O12 laminate under mechanical tests. This laminate showed a promising weak interface, as compared with the LaPO4/Y3Al5O12 system. The interfacial properties of a fiber model system, (viz., single crystal Y3Al5O12 (YAG) fiber/LaPO4 coating/Al2O3 matrix), as a function of coating thickness were evaluated by the fiber pushout test. Interfacial shear strength, frictional strength, mode II fracture energy, coefficient of friction, and clamping stress were obtained by curve-fitting the theoretical equations to the experimental data.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume17
Issue number4
DOIs
StatePublished - Jan 1 1996
EventProceedings of the 1996 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B - Cocoa Beach, FL, USA
Duration: Jan 7 1996Jan 11 1996

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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