Micro-mechanical evaluation of SiC-SiC composite interphase properties and debond mechanisms

Temperature-dependent proportional limit stress of SiC/SiC fiber-reinforced ceramic-matrix composites

“…Substituting the upstream and downstream temperature-dependent fiber and matrix axial stresses of equations (2), (3), (4), and (5) and the temperaturedependent fiber/matrix interface debonding length of equation 6into equation 1, the energy balance equation leads to the following equation:…”

“…Continuous SiC/SiC fiber-reinforced ceramic-matrix composites (CMCs) have excellent properties such as high specific strength, high specific modulus, wear resistance, oxidation resistance, corrosion resistance, radiation resistance, and insensitivity to cracks and noncatastrophic fracture, which make it a new type of thermal structural material in the application prospects of aviation, aerospace, and energy [1][2][3]. SiC/SiC composites are mainly used for hot section components of high-performance aeroengines and industrial gas turbines and have potential applications in nuclear fusion reactors and fission reactors [4][5][6][7][8][9]. Solar Turbines Company uses SiC/SiC as the combustion chamber lining of Solar's Centaur 505 engine.…”

Ceramic composites: A review of toughening mechanisms and demonstration of micropillar compression for interface property extraction

“…In order to understand the governing debond properties of the PyC interface, the Mohr-Coulomb fracture criterion (MC) is applied [53], [68], [69]. This criterion states that ultimate shear strength of a brittle ceramic is resisted by two components.…”

“…Experimentally, the applied uniaxial stress state can be resolved into the shear and normal stress at the interface plane, as illustrated in figure 1 of Kabel's work [69].…”

A finite fracture model for the analysis of multi-cracking in woven ceramic matrix composites

“…This damage tolerant feature is strongly related to the intensity of the fiber/matrix interface which must be optimized to promote matrix crack deflection [1]. An interphase is deposited onto the fibers in order to control this toughening mechanism [10]. Acoustic emission technique reveals as an appropriate tool to detect micro-cracking in such materials [11].…”