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Fabrication and Microstructure of C/SiC Composites Using a Novel Heaterless Chemical Vapor Infiltration Technique
Author(s) -
Tang Sufang,
Deng Jingyi,
Du Haifeng,
Liu Wenchuan,
Yang Ke
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00571.x
Subject(s) - chemical vapor infiltration , microstructure , fabrication , materials science , chemical vapor deposition , composite material , infiltration (hvac) , porosity , fiber , nanotechnology , medicine , alternative medicine , pathology
Fabrication of C/SiC composites by using the heaterless chemical vapor infiltration (HCVI) technique, which is an improved technology based on the conventional chemical vapor infiltration, is reported for the first time in this paper. In the HCVI process, a gradient temperature field formed in the fiber preform overcomes the problems of slow diffusion and restricted permeability of gaseous reactant species to some extent, and the electro‐deposition is necessary to accelerate the SiC deposition rates. The highest linear deposition rates of SiC matrix within inter‐fiber pores are 0.33 μm/h. Microstructures of the C/SiC composites are uniform, and the inter‐fiber and inter‐ply pores can be well infiltrated. The longitudinal and circumferential microcracks are found in the composites.