Microstructural Modeling and Thermomechanical Properties

Processing and characterization of 2D woven ZrB2‐based ultrahigh‐temperature ceramic matrix composites

“…The H‐type cracks show the crack deflection due to the de‐bonding of carbon fibers with porous matrix within the fiber layers. Because of the lower strength of a porous matrix within the fiber layers, porous composites are WMCs that allow crack deviation and branching near the fiber 47 . Non‐brittle behavior of the 2D C f ‐ZrB 2 and C f ‐ZrB 2 –SiC composites is due to the formation of well‐defined H‐type cracks.…”

“…The H‐type crack is formed by a combination of mode II matrix fracture near the fiber and mode I fiber bundle fracture 48 . The condition for the formation of H‐type crack is lower Young's modulus of the matrix within the fiber layers as compared to fiber 47,48 …”

“…Because of the lower strength of a porous matrix within the fiber layers, porous composites are WMCs that allow crack deviation and branching near the fiber. 47 Non-brittle behavior of the 2D C f -ZrB 2 and C f -ZrB 2 -SiC composites is due to the formation of well-defined H-type cracks. The H-type crack is formed by a combination of mode II matrix fracture near the fiber and mode I fiber bundle fracture.…”

“…48 The condition for the formation of H-type crack is lower Young's modulus of the matrix within the fiber layers as compared to fiber. 47,48 Mechanical properties of CMCs are a complex function of matrix, fiber, and fiber architecture. Composites prepared with nonwoven unidirectional fiber, for example, have higher mechanical strength than composites prepared with woven fibers.…”

Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process

“…Brittle and non-brittle behavior is dependent from the relative fracture energy of the interface and fiber as well as the relative Young's modulus ratio of the fiber and matrix [33,34]. The higher the relative Young's modulus ratio, the more likely the composite can function as WMC, comparable to carbon/carbon and oxide/oxide, which can be estimated by calculations.…”