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Creep Damage Mechanisms in Structural Ceramics

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Fracture Mechanics of Ceramics

Part of the book series: Fracture Mechanics of Ceramics ((FMOC,volume 10))

Abstract

The mechanisms responsible for fracture in structural ceramics at elevated temperatures are reviewed. It is seen that some features of the process are common to a wide range of materials, with quite different microstructures. These include a sensitivity to flaws or microstructural inhomogeneities which nucleate microcracks. However, it is often observed that the flaws which control failure under creep conditions are different from those responsible for fast fracture at ambient temperatures. Another common feature is the development of cracks through a process of gradual damage accumulation. There are however, differences which depend on the nature of microstructure. In pure materials and some multi-phase alloys with high volume fractions of the binder phase, the heterogeneities responsible for fracture initiation are far apart, and extensive crack growth occurs prior to failure. Such materials are crack growth dependent. In multiphase alloys in which the binder is a minor phase, the high degree of constraint produces many sites for damage to nucleate. However, the low ductility and damage tolerance of such materials leads to failure after only a modest amount of crack propagation. In such materials, modified Monkman-Grant behaviour is observed.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, L8S 4L7, Canada

    D. S. Wilkinson

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  1. D. S. Wilkinson
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Editor information

Editors and Affiliations

  1. University of Nevada-Reno, Reno, Nevada, USA

    R. C. Bradt

  2. Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA

    D. P. H. Hasselman

  3. University of Karlsruhe, Karlsruhe, Germany

    D. Munz

  4. Toyohashi University of Technology, Toyohashi, Japan

    M. Sakai

  5. High Tech Ceramics Scientific Research Centre, Moscow, Russia, CIS

    V. Ya. Shevchenko

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© 1992 Springer Science+Business Media New York

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Wilkinson, D.S. (1992). Creep Damage Mechanisms in Structural Ceramics. In: Bradt, R.C., Hasselman, D.P.H., Munz, D., Sakai, M., Shevchenko, V.Y. (eds) Fracture Mechanics of Ceramics. Fracture Mechanics of Ceramics, vol 10. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3348-1_23

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  • DOI: https://doi.org/10.1007/978-1-4615-3348-1_23

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6476-4

  • Online ISBN: 978-1-4615-3348-1

  • eBook Packages: Springer Book Archive

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