Integration of Carbon Nanotubes in an HFCVD Diamond Synthesis Process in a Methane-Rich H/CH Gas Mixture.

In this work, we present experimental data on carbon nanotubes integration during diamond synthesis. Carbon nanotubes layers were preliminarily deposited on silicon and diamond substrates, after which the substrates were loaded into the HFCVD reactor for further growth of the diamond phase. The CVD process was held in an argon-free H/CH working gas mixture without the use of a catalyst for carbon nanotubes growth.

CVD Diamond Interaction with Fe at Elevated Temperatures.

Chemical vapor deposition (CVD) diamond is a prospective thin film material for cutting tools applications due to the extreme combination of hardness, chemical inertness, and thermal conductivity. However, the CVD diamond cutting ability of ferrous materials is strongly limited due to its extreme affinity to iron, cobalt, or nickel. The diamond⁻iron interaction and the diffusion behavior in this system are not well studied and are believed to be similar to the graphite⁻iron mechanism.