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Deformation Behavior of Alumina at Elevated Temperatures

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Ceramics in Severe Environments

Part of the book series: Materials Science Research ((MSR,volume 5))

Abstract

The thermomechanical behavior and microstructural observations of several polycrystalline alumina bodies varying from 2–80 µm in grain size with typical purities of ⩾99% tested in compression at T ⩾1210°C are presented. The mechanical behavior of alumina is considered in terms of these results and similar investigations of the behavior of sapphire bicrystals. Plastic deformation is observed to be related to dislocations, mechanical twinning and/or grain boundary shear. In general, decreasing the grain size gives rise to a transition in deformation mechanisms and leads to increased mechanical strength. Impurities, however, strongly modify this relationship and are instrumental in enhancing grain boundary shear processes in alumina.

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Author information

Authors and Affiliations

  1. U. S. Naval Research Laboratory, Washington, D. C., USA

    Paul F. Becher

Authors
  1. Paul F. Becher
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Editor information

Editors and Affiliations

  1. Department of Materials Engineering, North Carolina State University, USA

    Wurth W. Kriegel

  2. Department of Engineering Research, North Carolina State University, USA

    Hayne Palmour III

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© 1971 Plenum Press, New York

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Becher, P.F. (1971). Deformation Behavior of Alumina at Elevated Temperatures. In: Kriegel, W.W., Palmour, H. (eds) Ceramics in Severe Environments. Materials Science Research, vol 5. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3141-4_21

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  • DOI: https://doi.org/10.1007/978-1-4684-3141-4_21

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-3143-8

  • Online ISBN: 978-1-4684-3141-4

  • eBook Packages: Springer Book Archive

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