Preparation and properties of TaC/C/TaC∼TaC composite micro-tubes by vapor phase tantalizing of the regular carbon micro-coils/micro-tubes

TaC/C/TaC∼TaC composite micro-tubes were prepared by the vapor phase tantalizing of the regular carbon micro-coils/micro-tubes, and the preparation conditions and some properties were examined. The carbon micro-coils with a tube-like morphology were tantalized from the surface to the core of the carbon fibers with full preservation of the tube-like morphology to form TaC/C/TaC∼TaC composite micro-tubes. The bulk electrical resistivity and specific surface area of the TaC/C/TaC∼TaC composite micro-tubes were 4 × 10−3 to 5 × 10−4 Ω·m and 5 × 103 to 2 × 104 m2/kg, respectively, depending on the tantalized ratio and the bulk density.