Determination of the physico-chemical mechanism and the efficiency of reactive filter materials to avoid H2-porosity in aluminum casting and to remove particles and H2 from magnesium melts (C06)

• Subject Area: Metallurgical, Thermal and Thermomechanical Treatment of Materials
• Term: from 2015 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 169148856

In the last funding period, the basically positive effect of a spodumene-containing filter material on the H2-porosity in aluminium casting has been demonstrated. Now, the focus is on the melt cleaning of alloys containing metallic secondary material. In addition, magnesium will be included as a further base metal. Both metals show a high content of dissolved hydrogen in the melt and are difficult to purify by typical pyrometallurgical processes. Therefore the effectiveness of new filter materials, such as Al2O3-C, MgAlON, 3CaO∙Al2O3, TiO2, will be investigated regarding in the removal of dross particles (Al, Mg) and sludge particles (Mg) while hydrogen (Al, Mg) can simultaneously be bound by means of a spodumene-containing filter. A significant reduction of undesired particles and gaseous precipitates in the castings is expected for both metals under optimal conditions.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 920: Multifunctional Filters for Metal Melt Filtration - a Contribution to Zero Defect Materials
• Applicant Institution: Technische Universität Bergakademie Freiberg
• Project Heads: Professorin Dr.-Ing. Christiane Scharf; Professor Dr. Michael Stelter