Steel Ceramic Composites resistant to long-term contact with molten aluminum alloys
Piotr Malczyk,
Tilo Zienert,
Florian Kerber,
Jana Hubálková,
Gert Schmidt,
Nora Brachhold,
Christos G. Aneziris
Affiliations
Piotr Malczyk
Corresponding author.; Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Tilo Zienert
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Florian Kerber
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Jana Hubálková
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Gert Schmidt
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Nora Brachhold
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
Christos G. Aneziris
Institute of Ceramics, Refractories and Composite Materials, Technische Universität Bergakademie Freiberg, 09599, Freiberg, Germany
The development and evaluation of novel stainless steel-based composites for direct contact with liquid aluminum alloys has been carried out. The Steel Ceramic Composite consisted of 60 vol% 316L stainless steel powder and 40 vol% of MgO or TiO2 ceramic powder. The sample were manufactured using uniaxial pressing and subsequent surface pre-oxidation at 850, 1000 °C for 24 h.The corrosion resistance of composite was investigated against molten AlSi7Mg0.3 alloy using crucible corrosion tests. The tests were carried out at 850 °C for 24 h and 168 h. The influence of pre-oxidation on the corrosion resistance of the samples was analyzed using XRD and SEM/EDS. The corrosion phases formed in the aluminum alloy were investigated using SEM/EDS/EBSD and PSEM/ASPEX/AFA and included the assessment of aluminum alloy contamination by evaluation of corrosion precipitation content, quantity and size. The sample Steel-MgO exhibited excellent corrosion resistance with negligible contamination of the aluminum alloy.
