Cellular SiC/Iron Alloy Composite

Barbara Lipowska1*, Bronisław Psiuk1, Mirosław Cholewa2

1Institute of Ceramics and Building Materials Refractory Materials Division, Toszecka 99, Gliwice, 44-100, Poland

2Silesian University of Technology, Department of Foundry Engineering, Towarowa 7, Gliwice, 44-100, Poland

DOI: 10.5185/amlett.2020.061530

Publication Date (Web): Dec 07, 2019

E-mail: b.lipowska@icimb.pl

Abstract


Cellular SiC/iron alloy composite with a spatial structure of mutually intersecting skeletons created with a porous ceramic preform has not been obtained before, despite promising spectrum of potential uses. We tested the possibility of obtaining such material using a SiC material with an oxynitride bonding and grey cast iron. Porous ceramic preforms were made by pouring the gelling ceramic suspension over a foamed polymer base which was next fired. The obtained samples of materials were subjected to macroscopic and microscopic observations as well as investigations into the chemical composition in microareas. It was found that the minimum width of a channel in the preform, which in the case of pressureless infiltration enables molten cast iron penetration, ranges from 0.10 to 0.17 mm. It was also found that the ceramic material applied was characterized by good metal wettability. Were the channels are wide enough for the metal penetration we observed that the ceramics/metal contact area always has a transition zone in which mixing of both components takes place.

Keywords

Ceramic-metal composites, porous ceramics, cast iron, silicon carbide.

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