Thermal sprayed aluminum coatings on carbon fiber reinforced Magnesium

Tuesday, May 28, 2019: 09:40
Annex Hall/F201 (Pacifico Yokohama)
Mr. Tino Mrotzek , Technische Universität Dresden, Dresden, Germany
Mr. Jan Conde-Wolter , Technische Universität Dresden, Dresden, Germany
Mr. Thomas Behnisch , Technische Universität Dresden, Dresden, Germany
Prof. Maik Gude , Technische Universität Dresden, Dresden, Germany
Dr. Maria Barbosa , Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
Mr. Davide Schultz , Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany
Mr. Stefan Scheitz , Fraunhofer Institute for Materials and Beam Technology, Dresden, Germany
Prof. Christoph Leyens , Fraunhofer Institute for Materials and Beam Technology, IWS, Dresden, Germany
Metal matrix composites (MMC), especially those based on Magnesium Matrix, have great specific strength and stiffness which makes ideal candidates for lightweight applications. With a density of only 1.8 g/cm3 they compete with carbon fiber reinforced plastics (CFRP) but offer higher thermal stability. In comparison with unreinforced metals they have overall improved mechanical properties, in particular fatigue. Unfortunately their high chemical reactivity leads to weak corrosion resistance, which makes coating and protection against environmental impacts absolutely mandatory. Thermal spray offer a wide range of coating possibilities which can act not only as an anticorrosive barrier but also as an interface layer for later integration in aluminum cast processes.

In this contribution, Aluminum-based coatings (Al99 and AlSi12) have been applied to carbon fiber reinforced magnesium specimens by atmospheric plasma spray and high velocity oxy fuel spray. The coatings have been characterized in terms of their microstructure and bond-/shear-strength. In addition hybrid-casting experiments have been carried out to determine the interface behavior.

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