Chapter 15. Microstructure and Mechanical Evaluation of Yttrium Phosphate-Containing and Lanthanum Phosphate-Containing Zirconia Laminates

  1. J. P. Singh
  1. Dong-Hau Kuo and
  2. Waltraud M. Kriven

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch15

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

How to Cite

Kuo, D.-H. and Kriven, W. M. (1997) Microstructure and Mechanical Evaluation of Yttrium Phosphate-Containing and Lanthanum Phosphate-Containing Zirconia Laminates, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294444.ch15

Author Information

  1. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign Urbana, IL 61801, USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

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Keywords:

  • elongation;
  • considerations;
  • volatilization;
  • stability;
  • fabricating

Summary

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.