High-temperature deformation of ZrO{sub 2}-Al{sub 2}O{sub 3}/SiC whisker composites fabricated by two techniques

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ZrO{sub 2} {minus} Al{sub 2}0{sub 3}/SiC whisker-reinforced composites, with whisker volume fractions of 0 to 28%, fabricated both by powder and precursor processing, have been deformed at temperatures of 1300--1500 C under constant compression rates of 1.7 {times} 10{sup {minus}5} to 6.8 {times} 10{sup {minus}5} s{sup {minus}1}. Above 1400 C, a stress at which the work-hardening rate became zero could be measured and correlated with whisker content. On the other hand, at 1300 C all samples broke within the elastic.regime. At 1350 C, increased whisker content appeared to inhibit fracture, so plastic behavior was obtained for samples containing 28% SiC. ... continued below

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17 p.

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Calderon Moreno, J.M.; DeArellano-Lopez, A.R.; Dominguez-Rodriguez, A. & Routbort, J.L. March 1, 1995.

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ZrO{sub 2} {minus} Al{sub 2}0{sub 3}/SiC whisker-reinforced composites, with whisker volume fractions of 0 to 28%, fabricated both by powder and precursor processing, have been deformed at temperatures of 1300--1500 C under constant compression rates of 1.7 {times} 10{sup {minus}5} to 6.8 {times} 10{sup {minus}5} s{sup {minus}1}. Above 1400 C, a stress at which the work-hardening rate became zero could be measured and correlated with whisker content. On the other hand, at 1300 C all samples broke within the elastic.regime. At 1350 C, increased whisker content appeared to inhibit fracture, so plastic behavior was obtained for samples containing 28% SiC. In the range of temperatures and compression rates, noted above, stress exponents were determined and tentatively correlated with microstructural features and their evolution during plastic deformation.

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17 p.

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OSTI as DE95008273

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  • 5. international conference on the science of hard materials, Maui, HI (United States), 20-24 Feb 1995

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  • Other: DE95008273
  • Report No.: ANL/ET/CP--85762
  • Report No.: CONF-950245--2
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 31657
  • Archival Resource Key: ark:/67531/metadc687702

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  • March 1, 1995

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  • July 25, 2015, 2:20 a.m.

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Calderon Moreno, J.M.; DeArellano-Lopez, A.R.; Dominguez-Rodriguez, A. & Routbort, J.L. High-temperature deformation of ZrO{sub 2}-Al{sub 2}O{sub 3}/SiC whisker composites fabricated by two techniques, article, March 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc687702/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.