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PRODUCTS &PROCESSES


Diamond-likecoatings enhance productivity and quality


Tecvac, the surface engineering specialist based in Cambridge, is advocating the application of the diamond-like carbon coating ‘Diamolith’, to improve the endurance and performance of


critical components


The Wallwork Group subsidiary has


introduced aservice


for the application of the high resistance low friction surface treatment for manufacturers


throughout the UK


Business development manager,Ian Haggan, says: “Applications arise in adiverse range of industries, from engineering,automotive and aerospace to paper and foil stamping,plastic moulding,pharmaceuticals and medical devices.”


In engineering and aerospace, wear components such as gears and camshafts are both hardened and made more lubricious so that their performance and working life is greatly extended. Likewise, the treatment of moulding tools and punching dies in paper, film and foil manufacture will prolong life and increase product quality and yield by preventing sticking and binding.This increases yield, quality and avoids the costs of re-work and scrap.


There are also applications in pharmaceutical production for the easy release of tablets from dies, as well as the manufacture of implanted medical devices, such as prostheses, where the coating offers good bio-compatibility with no inflammatory response. The low friction and resistance to erosion is also beneficial in improving the life and performance of rotating and bearing components in prosthetic limbs.


Applied by plasma-enhanced chemical vapour deposition (PECVD) at low temperature, the process does not generate sufficient heat to significantly alter the characteristics of the base material. The grey to black amorphous carbon coating gets its characteristics from sp2 and sp3 carbon, producing amix of graphite and diamond structures that give natural surface lubrication and exceptional hardness. The coatings can be applied to many materials including steel, aluminium, titanium and alloys.


Tecvac’s research and development department creates bespoke variations on the Diamolith


48 SURFACEWORLD january 2013 ‘Diamolith’ diamond like coatings conform


closely to the contours of critical components, creating protection from erosion and


providing a long lasting low friction surface


process to address specific technical challenges. This is undertaken in their research and development facility before transfer to afull scale production environment.


Formore information contact: Simeon Collins, Sales Director Tel: +44 (0) 161 797 9111 E-mail: simeon.collins@wallworkht.com www.wallworkht.com


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