Manufacturing SiC‐Fiber‐Reinforced SiC Matrix Composites by Improved CVI/Slurry Infiltration/Polymer Impregnation and Pyrolysis

Abstract

Two‐ and three‐dimensional SiCr/SiC composites have been prepared starting from Tyranno SA(tm) fiber preforms. Preform densification has been performed by a modified preceramic polymer impregnation and pyrolysis (PIP) process consisting of filling the preform large interbundle voids with SiC powder before the PIP process. This step was accomplished by low‐pressure infiltration of a SiC powder dilute slurry through the preform thickness. Specimens were further processed with polymer impregnation and pyrolysis to determine the effects on structural, thermal, and mechanical properties of the obtained composites. High‐temperature pyrolysis treatment, which promoted polymer derived SiC matrix crystallization, markedly increased thermal diffusivity.

Electrophoretic Deposition in Production of Ceramic Matrix Composites

“…Attempts have been made to combine the PIP technique with pressure-assisted slurry infiltration prior to the polymer infiltration [17]; yet suitable material properties could not be achieved.…”

Preparation of SiCf/SiC composites by the slip infiltration and transient eutectoid (SITE) process

“…Attempts have been made to combine the technique with pressure-assisted slurry infiltration prior to the polymer infiltration [7]; however, the current state of the art suggests that suitable material properties cannot be achieved.…”

Thermal and mechanical properties of SiC/SiC-CNTs composites fabricated by CVI combined with electrophoretic deposition

“…Nannetti et al [12] combined CVI, slurry infiltration and polymer infiltration pyrolysis (PIP) process to fabricate SiC/SiC composites. The prepared composites had higher thermal conductivity and density than CVI SiC/SiC composites.…”