Working group leader:
Dr. rer. nat. Abdullah Riaz
Justus-von-Liebig Weg 6
18059 Rostock
Tel.: +49 381 / 498 - 9138
Fax: +49 381 / 498 - 9092
Email: abdullah.riaz(at)uni-rostock.de
Room: UT15
Field-activated sintering/ Spark Plasma Sintering
In recent years, innovative processes such as the Field Assisted Sintering Technique (FAST), also known as Spark Plasma Sintering (SPS), have been developed. Since 2010, the University of Rostock has had its own sintering facility, which is equipped with two FAST/SPS systems (HP D5 and D125 from FCT Systeme GmbH Rauenstein, Germany) and a globally unique rapid gas cooling system.
FAST/SPS uses pulsed, directed current in combination with uniaxial pressure to solidify powders. The advantages of this process are cleaner grain boundaries in sintered ceramics, a remarkable increase in the superplasticity of ceramics, higher permittivity in ferroelectrics, improved magnetic and thermoelectric properties of functional materials as well as improved bonding quality or reduced segregation of impurities at grain boundaries.
The research focus of the Chair of Microfluidics using the FAST/SPS laboratory
1. bioactive and piezoelectric materials for multifunctional bone implants
2. high entropy alloys (HEA)
3. coupling of additive manufacturing and FAST/SPS processes
Current research projects
Completed research projects
The AiF-funded CatHEA project ("Metal-supported membrane electrode units with high-entropy alloy cathodes for alkaline polymer membrane water electrolysis") is being carried out in collaboration with the Chair of Materials Engineering / University of Rostock, Leibniz Institute for Plasma Research and Technology Greifswald and the Center for Fuel Cell Technology Duisburg.
The overall aim of this project is to produce a functional model of a low-cost, high-performance, precious metal-free membrane electrode unit for alkaline electrolysis.
As part of the sub-project, various high-entropy alloys (HEA) are mechanically produced at the Chair of Microfluidics and characterized using X-ray diffraction, electron scanning microscopy and spectroscopy. The focus is on HEA alloys that show high catalytic activities for the hydrogen evolution reaction (HER). If necessary, the HEA alloys will be adapted and further developed in consultation with the partners to improve their suitability for the overall project objective.
The HEA alloys with different sample diameters (10 - 100 mm) are sintered using the field-assisted sintering technology (FAST) and the spark plasma sintering process (SPS) at the Chair of Microfluidics. The sintered HEA samples are then used as targets for physical vapor deposition (PVD).
Author: Alexander Ahrend M.Sc.
Funding: AiF - Forschungsnetzwerk Mittelstand, IGF - Industrielle Gemeinschaftsforschung
Project duration: 11/2022-06/2024
Cooperation partners: Leibniz Institute for Plasma Research and Technology e.V. (INP Greifswald); Center for Fuel Cell Technology GmbH (ZBT Duisburg)
