Properties of carbon nano-tubes-Cf/SiC composite by precursor infiltration and pyrolysis process

Carbon nanotubes (CNTs) were introduced into the precursor infiltration and pyrolysis (PIP) carbon fiber reinforced silicon carbide matrix (C-f/SiC) composite via the infiltration slurry. The weight fraction of CNTs in the composite was 0.765%,. The fiber-matrix interface coating was prepared through chemical vapor deposition (CVD) process using methyltrichlorosilane (MTS). Effects of the CNTs on mechanical and thermal properties of the composite were evaluated by three-point bending test, single-edge notched beam (SENB) test, and laser flash method. Attributed to the introduction of the small quantity of CNTs, flexural strength and fracture toughness of the Cf/SiC composite both increased by 25%, and thermal conductivity at room temperature increased by 30%. (C) 2011 Elsevier Ltd. All rights reserved.