Creep of whisker-reinforced ceramics

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The results of high-temperature creep of various ceramic composites will be reviewed. In particular, creep results for Al{sub 2}O{sub 3} and Si{sub 3}N{sub 4} matrices reinforced with SiC whiskers will be emphasized. For a given temperature, stress and grain size, the creep rate of the Al{sub 2}O{sub 3} composite is usually lower than that of the ceramic matrix. In general, creep at low stresses occurs by grain boundary sliding accommodated by diffusion, whereas higher stresses lead to damage accumulation processes which are manifested by triple point cavitation and cracking. The quasi-steady-state creep rates depend on grain size, whisker concentration, and ... continued below

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Pages: (28 p)

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Routbort, J.L; Goretta, K.C. (Argonne National Lab., IL (United States)); Dominguez-Rodriguez, A. & de Arellano-Lopez, A.R. (Seville Univ. (Spain)) January 1, 1991.

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The results of high-temperature creep of various ceramic composites will be reviewed. In particular, creep results for Al{sub 2}O{sub 3} and Si{sub 3}N{sub 4} matrices reinforced with SiC whiskers will be emphasized. For a given temperature, stress and grain size, the creep rate of the Al{sub 2}O{sub 3} composite is usually lower than that of the ceramic matrix. In general, creep at low stresses occurs by grain boundary sliding accommodated by diffusion, whereas higher stresses lead to damage accumulation processes which are manifested by triple point cavitation and cracking. The quasi-steady-state creep rates depend on grain size, whisker concentration, and the amount of glass phase present between the boundary of the whisker and the matrix. Unless all of the parameters are known, including the fabrication and loading histories, comparisons between various studies that used samples prepared in different ways are difficult. 44 refs., 7 figs., 2 tabs.

Physical Description

Pages: (28 p)

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OSTI; NTIS; GPO Dep.

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  • 4. international conference on the science of hard materials, Madeira (Portugal), 10-15 Nov 1991

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  • Other: DE92001910
  • Report No.: ANL/CP-73166
  • Report No.: CONF-9111109--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5058420
  • Archival Resource Key: ark:/67531/metadc1056932

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  • January 1, 1991

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  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 30, 2018, 1:07 p.m.

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Routbort, J.L; Goretta, K.C. (Argonne National Lab., IL (United States)); Dominguez-Rodriguez, A. & de Arellano-Lopez, A.R. (Seville Univ. (Spain)). Creep of whisker-reinforced ceramics, article, January 1, 1991; Illinois. (digital.library.unt.edu/ark:/67531/metadc1056932/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.