TRANSFORMATION TOUGHENING IN CERAMICS

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Description

The origin of transformation toughening in ceramics is examined using two separate approaches: one based on the stress field ahead of the crack and the other on the changes in thermodynamic potential during a crack increment. Both approaches yield essentially similar predictions of trends in toughness with particle size, temperature, composition, etc. The stress intensity analysis provides fully quantitative predictions of the toughness. These indicate that the shielding of the crack by the transformation zone only develops in the presence of a transformed wake, leading to R-curve behavior.

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28 p.

Creation Information

Evans, A. G.; Marshall, D. B. & Burlingame, N. H. December 1, 1980.

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Description

The origin of transformation toughening in ceramics is examined using two separate approaches: one based on the stress field ahead of the crack and the other on the changes in thermodynamic potential during a crack increment. Both approaches yield essentially similar predictions of trends in toughness with particle size, temperature, composition, etc. The stress intensity analysis provides fully quantitative predictions of the toughness. These indicate that the shielding of the crack by the transformation zone only develops in the presence of a transformed wake, leading to R-curve behavior.

Physical Description

28 p.

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  • Journal Name: Advances in Ceramics

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  • Report No.: LBL-11598
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1077835
  • Archival Resource Key: ark:/67531/metadc830171

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Creation Date

  • December 1, 1980

Added to The UNT Digital Library

  • May 19, 2016, 9:45 a.m.

Description Last Updated

  • June 16, 2016, 5:09 p.m.

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Evans, A. G.; Marshall, D. B. & Burlingame, N. H. TRANSFORMATION TOUGHENING IN CERAMICS, article, December 1, 1980; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc830171/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.