Effect of sample test volume and geometry on the tensile mechanical behavior of SiC/SiC continuous fiber ceramic composites. Final report

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The development of a silicon carbide-type fiber from an organometallic precursor has led to a major resurgence of interest in fiber-reinforced ceramic matrix composites. By combining this high strength fiber with a variety of ceramic matrices it has been possible to achieve tough composites offering significant potential advantages over monolithic ceramics and carbon-carbon for high temperature applications. A continuous-fiber ceramic matrix composite (CFCC) typical of materials proposed for such industrial applications as power generation, heat recovery and chemical production as well as biomedical and environmental applications was tested in uniaxial tension using a universal test machine. Test parameters investigated included: ... continued below

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Medium: P; Size: [50] p.

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Sankar, J.; Kelkar, A.D. & Neogi, J. September 1, 1998.

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Description

The development of a silicon carbide-type fiber from an organometallic precursor has led to a major resurgence of interest in fiber-reinforced ceramic matrix composites. By combining this high strength fiber with a variety of ceramic matrices it has been possible to achieve tough composites offering significant potential advantages over monolithic ceramics and carbon-carbon for high temperature applications. A continuous-fiber ceramic matrix composite (CFCC) typical of materials proposed for such industrial applications as power generation, heat recovery and chemical production as well as biomedical and environmental applications was tested in uniaxial tension using a universal test machine. Test parameters investigated included: test mode (load versus displacement), test rate (0.003 mm/s, 0.03 mm/s, 50 N/s and 500 N/s), specimen geometry (straight-sided versus reduced-gauge section) and type of specimen volume (long/thin versus short/fat). Typical properties include an average elastic modulus 130 {+-} 10 Gpa, an average proportional limit stress of 45 {+-} 20 Mpa, an average ultimate tensile strength of 180 {+-} 20 MPa and an average modulus of toughness of 8.4 {+-} 2 (x10{sup 5})J/m{sup 3}.

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Medium: P; Size: [50] p.

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OSTI as DE98007373

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  • Other Information: PBD: [1998]

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  • Other: DE98007373
  • Report No.: DOE/OR/22119--T1
  • Grant Number: FG05-93OR22119
  • DOI: 10.2172/663575 | External Link
  • Office of Scientific & Technical Information Report Number: 663575
  • Archival Resource Key: ark:/67531/metadc711130

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  • September 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 13, 2015, 3 p.m.

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Sankar, J.; Kelkar, A.D. & Neogi, J. Effect of sample test volume and geometry on the tensile mechanical behavior of SiC/SiC continuous fiber ceramic composites. Final report, report, September 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc711130/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.