Rotary powder bed chemical vapour deposition of titanium nitride on spherical iron powder
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Abstract
Titanium nitride (TiN) was coated on to spherical iron powder by the rotary powder bed chemical vapour deposition technique using a reactant gas of the TiCl4-N2-H2 system. The dispersibility of the coated powder was significantly improved by the adsorption of the reactant gas on to the rotating particles during raising the temperature. Polycrystalline TiN film, having a columnar structure of a few micrometres was coated on to the iron powder, typically at a deposition temperature of 1000° C and at a treatment time of 80 min. The TiN-coated iron powder showed an oxidation resistance up to about 650° C.
Keywords
Oxidation Iron Polymer Titanium Nitride
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© Chapman and Hall Ltd. 1989