Chapter 26. Monazite and Scheelite Deformation Mechanisms

  1. Todd Jessen and
  2. Ersan Ustundag
  1. R. S. Hay

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch26

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4

How to Cite

Hay, R. S. (2008) Monazite and Scheelite Deformation Mechanisms, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 21, Issue 4 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294635.ch26

Author Information

  1. Air Force Research Laboratory, Materials Directorate, WPAFB, OH 45433

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375693

Online ISBN: 9780470294635

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Keywords:

  • electron microscopy;
  • recrystallized;
  • fiber matrix;
  • oxidation;
  • yttrium aluminum garnet (YAG)

Summary

Transmission electron microscopy observations of deformation after spherical indentation of polycrystalline monazite (LaPO4) and scheelite (CaWO4) are presented and discussed. Deformation mechanisms in monazite include extensive microcracking by cleavage, dislocation plasticity, and twinning. Similar mechanisms were observed in scheelite, except no twinning was found. Observations of deformation in monazite fiber coatings after fiber push-out at room temperature are also presented. A thin layer of monazite next to the fiber was heavily deformed and recrystallized.