炭素源にメタンを用いたTiCウイスカーの合成

概要

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Titanium carbide(TiC)whiskers were deposited on the outer surface of a graphite tube and on a graphite boat in 10 vol% methane gas stream following a heat treatment at 1000-1400℃. This temperature range was broader and lower than the 1250-1400℃ range in which TiC whiskers were obtained when 5 vol% methane gas was used in a thermal-decomposition-reduction-carbonization reaction. The lattice constant of TiC whiskers deposited on the outer surface of a graphite tube after the heat treatment at 1400℃ was 0.432084±0.007 nm, indicating that this TiC had a stoichiometric composition. The cylindrical whiskers formed at 1050-1200℃ were considered to have been grown via a vapor-solid(VS)growth mechanism. Because the side faces of the rectangular prismatic whiskers formed at 1300-1400℃ were dented, whisker growth in the radial direction may be caused by the layer stacking growth mechanism(a VS mechanism)due to two-dimensional nucleation on the{110}plane.
社団法人日本セラミックス協会の論文
1998-03-01