Citation
(2007), "Tribology system for Physica MCR Rheometers - Rheological and friction measurements on one instrument", Industrial Lubrication and Tribology, Vol. 59 No. 5. https://doi.org/10.1108/ilt.2007.01859ead.003
Publisher
:Emerald Group Publishing Limited
Copyright © 2007, Emerald Group Publishing Limited
Tribology system for Physica MCR Rheometers - Rheological and friction measurements on one instrument
Tribology system for Physica MCR Rheometers – Rheological and friction measurements on one instrument
Physica MCR Rheometers are known as established instruments for measuring flow properties of samples like food, paints, oils, and greases. Anton Paar is presenting now in cooperation with the Dr Tillwich GmbH the new Tribology accessory for Physica MCR Rheometers. This innovative accessory turns the conventional rheometer into a tribometer for ball-on-3-plates tests.
The tribology setup, developed by Werner Stehr from Dr Tillwich GmbH is based on the ball-on-3-plates principle. This device includes a ball measuring geometry consisting of a shaft, a ball, and a ball fixture. The ball fixture enables the use of balls made of different materials and their easy replacement.
The plate fixture at the bottom part is mounted on a flexible spring system allowing motion in all directions of the coordinate system: x, y, z. This flexibility ensures the concentric positioning of the fixture to achieve a uniform force distribution from the ball onto all 3 plates.
A good temperature control in the range from T=– 40ºC up to +200ºC is ensured due to the use Peltier elements which are installed close to the fixture and in an additional actively heated/cooled hood.
The tribology accessory is specially designed for the Physica MCR Rheometer. All the features of the instrument like, e.g. fast and accurate normal force control up to 50N, excellent rotational speed control, user-friendly software and flexible test settings are also available for the tribological measurements.
A friction test between a stainless steel ball and polyoxymethylene (POM) plates is shown in the chart. Here the load (normal force FN) was set to constantly to FN=6N, and the rotational speed has been increased from n=0 to 500min-1 (Friction coefficient f =FR/FN).
For more information please contact: Anton Paar Germany GmbH, Helmuth-Hirth-Strasse 6, D-73760 Ostfildern, Germany, Tel: +49 (0)711 720 910; Fax: +49 (0)711 720 91 630; E-mail: info.de@anton-paar.com