Applications
The latest developments in dry film lubrication surface engineering allow clinicians and biomedical engineers to accurately specify surfaces that reduce wear to very low levels. This improves performance by providing very high levels of lubricity,  with  free movement and minimal energy inputs for all types of machines and medical devices including prostheses, artificial limbs, drug delivery pumps and mobility devices.

Wear resistance
SLF74/16 provides the lowest friction coefficient  film coating commercially available today    at 0.03. This is lower than Diamond Like Carbon ( DLC) at  0.15,  and  even lower than graphite  at 0.1.

Tissue compatibility & fluid delivery
SLF is nonmagnetic, non-toxic, chemically inert and complies with ISO 10993 and USP Class 6. SLF is not affected by solvents,  saline  solutions, body fluids or medical grade lubricants.

Energy efficiency
The extremely low coefficient of friction, in temperature ranges of  -180C to 1300C,  provides smooth, energy efficient operation, especially on cutting edges or sliding surfaces in complex mechanisms.

Galling and adhesion prevention
Galling and adhesion on all types of steel, copper/brass and titanium can be virtually eliminated, while preserving load bearing properties up to 2450MpA

Matching advanced materials to clinical needs
Tecvac offers a full set of surface engineering solutions to meet the needs of medical device manufacturing, clinicians and surgeons.


Dry film lubrication - solid lubrication film  SLF74/16

Plasma modification & thermal processing

Dry film lubrication
Medical applications
Vacuum systems engineering
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Reduced wear & infection
A new coating developed by Tecvac including silver and chromium nitride has the potential to reduce both wear and joint infection in total hip replacement therapy.
See poster from Queen Mary College, University of London
Project BERTI; (Biomedical implant with Exceptional Resistance to Tribo-bio-corrosion and with Inherent antimicrobial properties) is expected to lead to new designs of  knee and hip implants and  substantially reduce the number of costly revision surgeries for hip and knee replacement patients. Partners in the project include Corin Plc, Tecvac Ltd, Imperial College, University of London, Charing Cross Hospitals, Queen Mary College, University of London and the University of Sheffield.
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Page update April 2012
SMART-HIP, a research project led by Cambridge coating specialist Tecvac Ltd and leading UK hip prosthesis manufacturer, Corin Ltd, has demonstrated the potential of new enhanced wear resistant coatings to increase implant longevity in Metal-on-Metal (MoM) hip prostheses and future potential applications to trunnions and tapers to prevent fretting and corrosion.

New PVD silver bearing coatings were developed which may protect against post-operative infection, and also provide a barrier to minimise metal ion release. Optimised coatings reduced the release of one important metal ion (Cobalt), implicated in chronic tissue inflammation, by 99%.

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£500,000 EPSRC project at the University of Sheffield

Tecvac Ltd has designed and built a unique, world class surface engineering research machine for The University of Sheffield as part of a £500,000 EPSRC project.

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