Creep of SiC–SiC microcomposites

The creep behavior of SiC/C/SiC microcomposites at 1200–1400 °C and 140–450 MPa was investigated in the presence and absence of matrix cracking. The microcomposites consisted of single Hi Nicalon or Carborundum fibers coated with a CVD carbon interlayer and a CVD SiC matrix. Since the fibers and mat...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 1999-01, Vol.19 (13), p.2285-2296
Main Authors: Rugg, Kevin L., Tressler, Richard E., Bakis, Charles E., Lamon, Jacques
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
composites
creep
Exact sciences and technology
modelling
SiC
SiC-fibers
Structural ceramics
Technical ceramics
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Summary:The creep behavior of SiC/C/SiC microcomposites at 1200–1400 °C and 140–450 MPa was investigated in the presence and absence of matrix cracking. The microcomposites consisted of single Hi Nicalon or Carborundum fibers coated with a CVD carbon interlayer and a CVD SiC matrix. Since the fibers and matrix had been examined by the identical experimental technique, direct comparisons of the creep of the composite and of the constituents were performed. The creep of uncracked microcomposites was successfully modeled using a simple rule of mixtures algorithm. When matrix cracks were present, the microcomposites were modeled using a series composite consisting of intact microcomposite, exposed fiber at the matrix crack, and the debonded region in between. Trends for behavior with respect to the various mechanical and structural parameters that control creep are presented.
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(99)00118-1