Volume 23, Issue 2 (April 2001)

    Matrix Properties of Textile Reinforced Ceramic Matrix Composites Measured by Nanoindentation

    (Received 27 February 2000; accepted 27 October 2000)

    CODEN: CTROAD

      Format Pages Price  
    PDF Version 9 $25   ADD TO CART


    Abstract

    Nanoindentation was used to measure the elastic modulus (E) and hardness (H) of the matrix materials of three ceramic composites reinforced with woven Nicalon fiber fabrics. The matrices included: (1) alumina produced by the Dimox process; (2) silicon carbide synthesized by chemical vapor infiltration; and (3) a SiC/BN material produced by polymer infiltration pyrolysis. The elastic moduli and hardnesses of the matrices of all three materials were found to be significantly lower than bulk ceramics of similar composition, probably due to porosity in the matrix and/or incomplete conversion of the infiltration materials to ceramic. Each of the composites was exposed to air at 750°C for 64 h, and measurements of E and H were made. The silicon carbide matrix was essentially unaffected, but two other materials exhibited significant reductions in both E and H caused by thermal exposure.


    Author Information:

    Davidson, DL
    Southwest Research Institute, San Antonio, TX

    Pharr, GM
    The University of Tennessee & Oak Ridge National Laboratory Department of Materials Science & Engineering, Knoxville, TN


    Stock #: CTR10918J

    ISSN: 0884-6804

    DOI: 10.1520/CTR10918J

    ASTM International is a member of CrossRef.

    Author
    Title Matrix Properties of Textile Reinforced Ceramic Matrix Composites Measured by Nanoindentation
    Symposium , 0000-00-00
    Committee D30