C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/12 (2006.01) C23C 16/30 (2006.01) C23C 16/40 (2006.01)
Patent
CA 2104589
2104589 9313243 PCTABS00024 A substrate is provided with a resistant coating by the chemical-vapor deposition of hard material, by passing a gaseous mixture of a precursor of the material, an accelerant, an oxidant, and a carrier gas over the substrate surface, and then removing the by-products and unreacted materials; mixtures of hard materials are obtained by using a co-reagent in the gaseous mixture. The substrate is preferably heated. The figure shows a schematic of the apparatus which includes the precursor (102), the accelerant (104) which are vaporized and transferred to a reactor (120). A mixture of chromium oxide and tin oxide is the preferred coating material, obtained by decomposition of chromyl chloride and monobutyltintrichloride on the substrate surface in the presence of methylisobutylketone and air. Other metal mixtures can also be used.
Buchanan Jerome L.
Dirkx Ryan R.
Atofina Chemicals Inc.
Borden Ladner Gervais Llp
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