Chapter 10. Texture Development in Reaction-Bonded Alumina (Rbao) Ceramics Via Templated Grain Growth

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Ender Suvaci and
  2. Gary L. Messing

Published Online: 28 MAR 2008

DOI: 10.1002/9780470294635.ch10

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

Suvaci, E. and Messing, G. L. (2008) Texture Development in Reaction-Bonded Alumina (Rbao) Ceramics Via Templated Grain Growth, 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.ch10

Author Information

  1. Department of Materials Science and Engineering and Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802 USA

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:

  • liquid phase sintering;
  • templated grain growth;
  • crystallographic;
  • oriented equiaxed grains

Summary

Texture development in liquid-phase sintered RBAO ceramics has been studied during templated grain growth (TGG): a technique for developing crystallographic texture in ceramic bodies via the grain growth of aligned non- equiaxed particles in a dense and fine grain size matrix. The process of TGG occurs in 3 stages: densification, initial growth of individual template particles and template impingement and template thickening. To understand texture development in RBAO ceramics during each stage of TGG, we have performed a series of experiments to isolate the growth of an individual grain. Experiments with samples containing low template (∼1 vol%) concentration at 1450°C showed that the radial growth of platelets is rapid and controlled by diffusion, whereas growth perpendicular to the basal surface is controlled by nucleation.