Volume 19, Issue 3 (July 1997)

    Hoop Tensile Strength and Fracture Behavior of Continuous Fiber Ceramic Composite (CFCC) Tubes from Ambient to Elevated Temperatures

    CODEN: CTROAD

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    Abstract

    Presently, continuous-fiber ceramic composites (CFCCs) are considered leading candidate materials for many high-temperature applications, such as high-pressure heat exchangers, radiant burner tubes, and engine combustors. To adequately evaluate these materials in their cylindrical configurations, a hoop tension test is needed.

    A hydrostatic pressurized test was developed to obtain the hoop tensile strength from ambient to elevated temperatures (> 1500°C). The method allows only hydrostatic pressure to develop inside the cylinder to cause failure from a hoop tensile stress.

    This test method evolved from testing monolithic ceramics to continuous-fiber ceramic matrix composite (CMC) tubes. The results of early hydrostatic tests are briefly reviewed. A highlight of one test identified fiber tow pull-out at 1000°C where the tube indicated localized aneurysm-type deformation. Another CFCC material system, evaluated at room temperature, exhibited fiber pull-out on the order of 5 to 7 mm. The circumferential elastic modulus was also obtained.


    Author Information:

    Graves, GA
    Group leader and senior research ceramist, University of Dayton Research Institute, Dayton, OH

    Chuck, L
    Associate materials scientist, University of Dayton Research Institute, Dayton, OH


    Stock #: CTR10029J

    ISSN: 0884-6804

    DOI: 10.1520/CTR10029J

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    Author
    Title Hoop Tensile Strength and Fracture Behavior of Continuous Fiber Ceramic Composite (CFCC) Tubes from Ambient to Elevated Temperatures
    Symposium , 0000-00-00
    Committee D30