Comparison of high temperature mechanical properties of two monolithic SiC ceramics and an Al{sub 2}O{sub 3}/SiC composite

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Description

Fast fracture strength, slow crack growth, and creep properties have been evaluated for three ceramics in air at room temperature and two elevated temperatures. The ceramics are candidate materials for heat exchangers in fossil energy systems, therefore, retained strength after coal ash exposure was also measured. At 1100{degrees}C the ceramics had acceptable mechanical properties, but two of them exhibited strength loss due to coal ash corrosion. At 1400{degrees}C creep and slow crack growth were observed in two of the materials, and the material which exhibited best resistance to coal ash showed unacceptably high creep rates.

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12 p.

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Breder, K. July 1, 1995.

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Fast fracture strength, slow crack growth, and creep properties have been evaluated for three ceramics in air at room temperature and two elevated temperatures. The ceramics are candidate materials for heat exchangers in fossil energy systems, therefore, retained strength after coal ash exposure was also measured. At 1100{degrees}C the ceramics had acceptable mechanical properties, but two of them exhibited strength loss due to coal ash corrosion. At 1400{degrees}C creep and slow crack growth were observed in two of the materials, and the material which exhibited best resistance to coal ash showed unacceptably high creep rates.

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12 p.

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OSTI as DE95014578

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  • 9. annual conference on fossil energy materials, Oak Ridge, TN (United States), 16-18 May 1995

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  • Other: DE95014578
  • Report No.: CONF-9505204--8
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 93608
  • Archival Resource Key: ark:/67531/metadc793688

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  • July 1, 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 21, 2016, 6:51 p.m.

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Breder, K. Comparison of high temperature mechanical properties of two monolithic SiC ceramics and an Al{sub 2}O{sub 3}/SiC composite, article, July 1, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc793688/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.