Microstructure and mechanical evaluation of yttrium phosphate-containing and lanthanum phosphate-containing zirconia laminates

Dong Hau Kuo, Waltraud M. Kriven

Research output: Contribution to journalConference article


Eight types of oxide laminates consisting of combinations of xenotime (YPO4) with zirconia (ZrO2), and monazite (LaPO4) with ZrO2 were studied. Four of the laminates were YPO4-containing ZrO2 laminates. The other four materials were LaPO4-containing ZrO2 laminates. They were fabricated by repeatedly stacking two or three kinds of tape-cast layers, lamination, organic burnout and consolidation by hot-pressing. High strength (360, 390 MPa) and apparent work-of-fracture (WOF = 8.2, 10 kJ/m2) were measured in one of the YPO4-containing ZrO2 laminate in a stacking sequence of YPO4; yttria stabilized ZrO2 (Y-ZrO2); 30 vol% Y-ZrO2-70 vol% alumina (Al2O3); and Y-ZrO2. A toughening mechanism by means of residual, interlaminar shear stress-enhanced, interface delamination is proposed for these good results. One of the LaPO4-containing ZrO2 laminates, fabricated in a stacking sequence of LaPO4 and 70 vol% doped ZrO2-30 vol% Al2O3, displayed moderate strength and WOF.

Original languageEnglish (US)
Pages (from-to)129-136
Number of pages8
JournalCeramic Engineering and Science Proceedings
Issue number4 B
StatePublished - Jan 1 1997
EventProceedings of the 1997 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures-B - Cocoa, FL, USA
Duration: Jan 12 1997Jan 16 1997


ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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