TEM structure of (PyC/SiC)n multilayered interphases in SiC/SiC composites

An integrated micromechanical model and BP neural network for predicting elastic modulus of 3-D multi-phase and multi-layer braided composite

“…The 3-D braided C/C-SiC composite is obtained by using the chemical vapor infiltration (CVI) process [30] to alternately infiltrate the multi-layered material phases. During the CVI process, the braided carbon fiber perform is infiltrated with the matrix deposited from a gaseous precursor (a hydrocarbon for pyrolytic carbon and a chlorosilane for SiC).…”

Initial assessment of environmental effects on SiC/SiC composites in helium-cooled nuclear systems

“…In the multilayered interphase the carbon mechanical fuse is split into thin sublayers, each being protected against oxidation by the neighboring SiC-based glass former layers. 48 The first generation of multilayers was synthesized by isobaric CVI with sublayers of micrometer thickness, and used early generation SiC fibers (Nicalon NL202). The second generation of multilayer composites was developed with nanometer-size sublayers formed by pressure-pulsed CVI.…”

Research progress on thermal protection materials and structures of hypersonic vehicles

“…The preparation methods of C/SiC composites include RMI method, LPI method and CVI method. Bertrand [66] developed two generations of multilayered interphases, composed of carbon and silicon carbide, which act as a mechanical fuse in SiC/SiC composites with improved oxidation resistance. Examinations were then performed on the loaded samples and damaging mode characterized at nanometric scale.…”