Fabrication in-situ SiC nanowires/SiC matrix composite by chemical vapour infiltration process

Micro-nano Components Materials Group, Materials Engineering Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan; Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
Materials Letters 01/2004; DOI: 10.1016/j.matlet.2004.05.059

ABSTRACT A SiC nanowires-reinforced SiC matrix composite was fabricated using chemical vapour infiltration (CVI) process. SiC nanowires with thin carbon coating were grown directly in a fibrous preform prior to the CVI matrix densification. The nanowires consist of single crystal β phase SiC and uniform carbon shell coating of ∼5 nm, with diameters of several tens to 100 nm. The volume fraction of the nanowires in the fabricated composite is ∼5%. Contributions of the nanowires to the mechanical properties of the composite are expected.

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