| Abstract: | Oxide ceramic matrix composites Oxide ceramics display excellent thermal and chemical stability up to high temperatures. A suitable way to overcome the inherent brittleness of oxide ceramics is the reinforcement with oxide fibers. Although both constituents, fibers and matrices are brittle, the composites display quasi‐ductile deformation behavior, due to mechanisms such as crack deflection, crack bridging or fiber pull‐out. A premise for these mechanisms to work is the relatively weak bonding between fibers and the matrix. To achieve a weak fiber/matrix bonding either suitable fiber coatings are employed or, in an alternative approach, highly porous matrices are used. WHIPOX, developed at DLR is a ceramic matrix composite belonging to the porous matrix group. These materials have a high potential for thermal protection systems and liners in gas turbine engines and beyond. |
