Author： Ly H.Q. Taylor R. Day R.J.
Publisher： Springer Publishing Company
ISSN： 0022-2461
Source： Journal of Materials Science, Vol.36, Iss.16, 2001-08, pp. : 4027-4035
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Abstract
C/SiC-based composites were produced by infiltration of a woven carbon fabric preform with a polycarbosilane (PCS) solution. Progress of the infiltration process up to eight infiltrations was followed by density measurements, microscopy and mechanical testing. After six infiltration cycles, the density increase tended to a plateau. Dense deposition of the matrix on the outer surface sealed off the core of the composite, which hindered successive infiltrations. With further re-infiltration cycles, the development of the matrix and the degree of bonding between the fibre and matrix increased. There was also a transition in the failure mode of the composite, when tested in 3-point bending, from shear to plain brittle tensile failure, as the number of infiltrations increased.
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