Department of Materials Science

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Department of Materials Science (DMS) is one of the biggest education and research units at Tampere University of Technology. At the moment, DMS is the only higher education unit in Finland covering all material groups, i.e., metals, ceramics, polymers, and composites. The cornerstone of research and teaching at DMS is high-level basic research of the structure, properties, processing, and use of materials. In addition, DMS is operating in very close collaboration with Finnish industry in applied materials research and product development. About two-thirds of the total funding and practically all of the research funding of DMS comes from outside the university budget, mainly from the Finnish industry, SHOKs, Tekes, Academy of Finland, and the EU. Department of Materials Science is among the largest departments at Tampere University of Technology and have taught about 900 MSc students, 80 licentiates and over 60 doctors since 1969. http://www.tut.fi/en/about-tut/departments/materials-science/

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Towards comprehensive control of wear

Kati Valtonen

Selecting of the best possible testing approach for mining and mineral handling cases, it is important to have a good understanding of the relevance of the laboratory wear tests in predicting the in-service performance of materials in high stress wear conditions. Thus, utilization of the laboratory test results more straightforward for the industry. However, generally several different laboratory test methods are needed to properly cover this kind of severe in-service conditions.

Application oriented wear testing equipment

Kati Valtonen

Tampere Wear Center (TWC) concentrates on both scientific and practical aspects of wear and tribology, trying to bridge the gap between scientific basic research and applied industrial research and product development. The aim of TWC is to provide in-depth insight into the mechanisms of wear and thereby facilitate the development of new wear resistant materials and to find solutions to the practical wear problems constantly faced by the industry. TWC has excellent infrastructure for wear and tribology research, as well as highly qualified scientists and research engineers for the needs of both long-term scientific research and product development for the industry. TWC conducts research in close collaboration with several internationally recognized partners.

Tampere Wear Center activities and research equipment 2015

Kati Valtonen

R. Suihkonen, J. Perolainen, M. Lindgren, K. Valtonen, N. Ojala, E. Sarlin, J. Vuorinen: Erosion wear of glass fibre reinforced vinyl ester, Nordtrib 2014, Aarhus 10.-13.6.2014. Presentation by Kati Valtonen. Glass fibre reinforced vinyl ester composites are widely used in tanks, piping, ducts, and fans in demanding applications, such as waste water treatment plants,chemical processing, and pulp and paper manufacturing due to their excellent chemical resistance and mechanical performance. In addition to corrosive environments, materials are typically exposed to erosion wear and high temperatures (close to 100°C) in many hydrometallurgical processes. However, there is limited understanding on the erosion wear of vinyl ester based composites and, therefore, knowledge should be gained on this field in order to evaluate their long-term behaviour and to optimise the maintenance intervals of different structures in various wear conditions. This study evaluates the slurry-erosion wear of glass fibre reinforced vinyl ester composites (VE-FRP) using a high speed slurry-pot type wear tester. The wear rates of VE-FRP were compared using different abrasives, namely quartz, chromite, ore, concentrate, and tailings. Furthermore, the effect of abrasive particle size and slurry concentration on the VE-FRP wear was studied. The erosion wear results of VE-FRP were compared to different rubbers, such as natural rubber (NR) and bromobutyl rubber (BIIR) as well as to few common thermoplastics, such as polypropylene (PP) and polyvinyl chloride (PVC), which are potential sensor, gauge, lining, and other wear resistant part materials in hydrometallurgical applications. The results demonstrated that coarse quartz produced the largest wear rates on VE-FRP samples, while the concentrate showed the lowest wear. Minor changes in the abrasive particle size had no effect on the wear results, only when the particle size was markedly raised, the wear started to increase. When comparing the wear rates of different materials, it was concluded that with all abrasive types, tested rubbers and thermoplastics had lower wear rates than VE-FRP.

Valtonen nordtrib14 presentation_final

Kati Valtonen

Tampere Wear Center & Research equipment 2014

Kati Valtonen

Tampere Wear Center (TWC) concentrates on both scientific and practical aspects of wear, trying to bridge the gap between scientific basic research and applied industrial research and product development. The aim of TWC is to provide in-depth insight into the mechanisms of wear and thereby facilitate the development of new wear resistant materials and to find solutions to the practical wear problems constantly faced by the industry. TWC has excellent infrastructure for wear research, as well as highly qualified scientists and research engineers for the needs of both long-term scientific research and product development for the industry. TWC conducts wear research in close collaboration with several internationally recognized partners. http://www.tut.fi/twc/en

Research Equipment at the Tampere Wear Center

Kati Valtonen

Tampere Wear Center (TWC) concentrates on both scientific and practical aspects of wear, trying to bridge the gap between scientific basic research and applied industrial research and development. The aim of TWC is to provide new insight to the mechanisms of wear and thereby facilitate the development of new wear resistant materials and solve the practical wear problems that the industry constantly faces. TWC is a part of the Department of Materials Science of Tampere University of Technology. TWC utilizes the versatile and up-to-date research and testing equipment of DMS as well as exploits the knowledge and expertise of its reseach in all groups of materials. TWC is rapidly developing into an internationally recognized concentration of advanced wear test facilities and expertise. Wear Forum is a collaboration network between TWC, research institutes, and companies. Wear forum connects the material specialists with wear experts. Forum offers both a national and an international collaboration network. http://www.tut.fi/twc/en

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Department of Materials Science

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