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Improvements in the fabrication of ceramic-fiber-ceramic-matrix composites by chemical vapor infiltration
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The development of a new, faster process for the fabrication of ceramic-fiber-reinforced-ceramic-matrix composites by chemical vapor infiltration has continued.Abstract:
Development of a new, faster process for the fabrication of ceramic-fiber-reinforced-ceramic-matrix composites by chemical vapor infiltration has continued. Composites of SiC fibers infiltrated with a matrix of either SiC or Si/sub 3/N/sub 4/ have been produced. Process and equipment improvements led to the fabrication of preforms with a higher fiber content, and infiltration improvements reduced infiltration times and increased infiltrated densities. These improvements have produced composites with higher flexural strengths (up to 475 MPa) and high strain values (up to 1%). The high strength and high strain values along with the gradual loss of strength (in contrast to the sudden loss typical of ceramics) were major goals of this work.read more
Citations
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Journal ArticleDOI
Multiscale ceramic matrix composite thermomechanical damage model with fracture mechanics and internal state variables
TL;DR: In this paper, a multiscale damage model that accounts for ceramic matrix composite (CMC) length scale dependent behavior, including scale-specific brittle matrix damage initiation and propagation, is presented.
Determining thermal diffusivity and defect attributes in ceramic matrix composites by infrared imaging.
TL;DR: In this article, a non-destructive evaluation (NDE) method has been used to analyze as-processed conditions and defect detection created during manufacturing of ceramic matrix composites.
Book ChapterDOI
An Improved Fracture Mechanics-Informed Multiscale Thermomechanical Damage Model for Ceramic Matrix Composites
TL;DR: In this article, the authors extended the damage model to include the effects of local anisotropy introduced by matrix cracking by employing internal state variable theory within a multiscale modeling framework to obtain damaged matrix stress/strain constitutive relationships.
References
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Journal ArticleDOI
Multiscale ceramic matrix composite thermomechanical damage model with fracture mechanics and internal state variables
TL;DR: In this paper, a multiscale damage model that accounts for ceramic matrix composite (CMC) length scale dependent behavior, including scale-specific brittle matrix damage initiation and propagation, is presented.
Proceedings ArticleDOI
Determining thermal diffusivity and defect attributes in ceramic matrix composites by infrared imaging
TL;DR: In this article, a non-destructive evaluation (NDE) method was developed at Argonne National Laboratory for analyzing as-processed conditions and defect detection created during manufacturing.
Book ChapterDOI
An Improved Fracture Mechanics-Informed Multiscale Thermomechanical Damage Model for Ceramic Matrix Composites
TL;DR: In this article, the authors extended the damage model to include the effects of local anisotropy introduced by matrix cracking by employing internal state variable theory within a multiscale modeling framework to obtain damaged matrix stress/strain constitutive relationships.