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Poster

Interface formation of Mg2X (X = Si, Sn) in cellular Si infiltrated by Mg(Sn) alloys

Wednesday (24.10.2018)
19:06 - 19:09
Part of:
Line-Up:
- Poster Battery housings for electric vehicles using CFRP and aluminium foam 0 Joachim Baumeister
- Poster Manufacturing and characterization of open-cell stainless steel foams by investment casting 1 Jan Frömert
- Poster Interface formation of Mg2X (X = Si, Sn) in cellular Si infiltrated by Mg(Sn) alloys 1 Alexander M. Matz
- Poster Production of microcellular PMMA using the bead foaming technology 1 Mikel Mugica
- Poster Nanocellular PMMA with tunable cellular structure by changing the rheological behaviour of the polymer matrix. 1 Judith Martín de León
- Poster Production of thermoplastic polyurethane foams synthesized with different contents of hard segment and graphene nanoplatelets by the gas dissolution foaming process 1 Ph.D. Mercedes Santiago-Calvo
- Poster Surface functionalized filters for aluminum melt filtration 1 Dr.-Ing. Claudia Voigt
- Poster Nanocellular polymers based on PMMA/sepiolite nanocomposites: characterization of the mechanical behaviour 1 Victoria Bernardo
- Poster Impact resistant foams based on PP/POE blends 1 Ph.D. Santiago Munoz Pascual
- Poster Crosslinked open cell ethylene butyl acrylate copolymer (EBA) foams: properties and applications 1 Ph.D. Eduardo López
- Poster Influence of molecular weight in the solubility,diffusivity and the subsequent cellular structure of polystyrene foams 1 Ph.D. Alberto Ballesteros
- Poster Crushing strength measurement at reticulated ceramic foams ex situ and in situ CT analysis 1 Dr.-Ing. Claudia Voigt
- Poster Initiation of plateau region during compression test of porous metals with aligned unidirectional pores 1 Tomoya Tamai
- Poster Active meta-materials with adjustable pore size 1 Dr. Reza Hedayati
- Poster Polymeric foams 3D numerical mechanical modelling 1 Stefano Tagliabue
- Poster Characterisation of NiTi cellular materials fabricated by the powder-metallurgy spaceholder technique 1 Dr. Karl Dahm
- Poster Accurate separation of open cell metal foams using remote laser cutting technique 1 Robert Baumann
- Poster Generation of artificial foam structures and evaluation of their thermo-mechanical, flow and filtration characteristics (Poster) 1 Christoph Settgast
- Poster Surface modification of magnesium-based foams by Directed Plasma Nanosynthesis 1 Viviana Marcela Posada Pérez

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Magnesium based Mg2X (X = Si, Sn) intermetallic compounds are of great interest due to their potential applications in lithium-ion batteries, infrared sensors, solar cell and thermoelectric devices. Mg2X compounds are also important owing to non-toxicity, abundance of raw materials, and relatively inexpensive constituents, as well as having good mechanical and chemical properties and a low density.


Processing of these materials beyond small scales is a challenging task. The major difficulty in this context is the difference in the melting point of Si with T=1440°C and the boiling point of Mg with T=1090°C. Hence, common melt metallurgical methods show problems in controlling the stoichiometric composition due to the volatilization and oxidation of Mg coupled with large differences in vapor pressure of the constituents. For these reasons, we propose an alternative method for manufacturing Mg2X intermetallic compounds. This method is based on a splitting of the common melt metallurgical processing route into several successive steps. Firstly, an open-pore cellular Si structure is fabricated by investment casting. In a further step, the cellular Si structure is infiltrated by a molten Mg alloy, followed by a subsequent thermal and/or mechanical treatment. The attractive aspects in this context are the open-pore structure, which ensures a fluid exchange between the individual cells and, thus, the infiltration with molten metal, and the very large specific surface area, which promotes the diffusion process between the cellular structure and the infiltrated matrix material.


Recently, we have described the formation and dispersion behavior of the intermetallic compound resulting by the infiltration process. Based on these results, we further study the interface formation of Mg2X (X = Si, Sn) resulting by annealing experiments and we identify the degradation temperature of the compound. SEM is used for observing the microstructure of the composites and EDX to determine the phase compositions.

Speaker:
Alexander M. Matz
Pforzheim University of Applied Sciences
Additional Authors:
  • Bettina S. Matz
    Pforzheim University of Applied Sciences
  • Johann Heimann
    Pforzheim University of Applied Sciences
  • Prof. Dr. Norbert Jost
    Pforzheim University of Applied Sciences