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

• Published in: Journal of the American Ceramic Society Vol. 87; no. 7; pp. 1205 - 1209
• Main Authors: Nannetti, Carlo Alberto, Ortona, Alberto, de Pinto, Dario A., Riccardi, Bruno
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.07.2004; Blackwell; Wiley Subscription Services, Inc
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Ceramics; Cermets, ceramic and refractory composites; Chemical industry and chemicals; Composite materials; Cross-disciplinary physics: materials science; rheology; Crystallization; Exact sciences and technology; Materials science; Other materials; Physics; Polymers; Specific materials; Structural ceramics; Technical ceramics; Temperature; Ceramic matrix composite; Scanning electron microscopy; Pyrolysis; Fiber reinforced material; Mechanical properties; Polymer; Experimental study; Fabrication property relation; Composite material; Non oxide ceramics; Structural ceramic; Thermal properties; Impregnation; Silicon Carbides; Polymer impregnation pyrolysis method; Chemical vapor infiltration; Fabrication structure relation; Manufacturing; Microstructure; Ceramic fiber
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1551-2916.2004.tb20093.x

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.