Title: Hardide™: advanced nano-structured CVD coating

Authors: Yuri N. Zhuk

Addresses: Hardide Plc., Unit 11, Wedgwood Road, Bicester, Oxfordshire OX26 4UL, UK

Abstract: Hardide™ is a family of new low-temperature Chemical Vapour Deposition (CVD) Tungsten/Tungsten Carbide coatings. Coating consists of Tungsten Carbide nano-particles dispersed in metal Tungsten matrix, that give the material enhanced hardness of between 1100 Hv and 1800 Hv, and abrasion resistance up to 12 times better than Hard Chrome. Nano-structured materials show unique toughness, crack and impact-resistance. The coating is resistant to acids and aggressive media, can be produced on steel, including stainless steel and some tool steels, with coating thickness varied from 5 microns to 100 microns. Gas-phase CVD process allows coating internal surfaces and items of complex shape like dies, moulds, pump cylinders. Homogeneous pore-free structure facilitates finishing by honing, polishing, mirror finish can be achieved with suitable substrate. Use of Hardide with cutting tools for paper and plastics makes them self-sharpening. Application of Hardide increases life of tools and critical components and reduces down-time.

Keywords: gas phase CVD; tungsten carbide; hard coatings; wear resistance; erosion resistance; acid resistance; nanostructures; non-stick coatings; nanoparticles; nanotechnology; nanomaterials; cutting tools; tool life; suface finishing; microstructure; material properties.

DOI: 10.1504/IJMMP.2007.012942

International Journal of Microstructure and Materials Properties, 2007 Vol.2 No.1, pp.90 - 98

Published online: 31 Mar 2007 *

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