Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Interfacial Phenomena between Liquid Si-Rich Si-Zr Alloys and Glassy Carbon

Version 1 : Received: 12 February 2020 / Approved: 14 February 2020 / Online: 14 February 2020 (04:28:22 CET)

How to cite: Giuranno, D.; Polkowski, W.; Bruzda, G.; Kudyba, A.; Narciso, J. Interfacial Phenomena between Liquid Si-Rich Si-Zr Alloys and Glassy Carbon. Preprints 2020, 2020020188 (doi: 10.20944/preprints202002.0188.v1). Giuranno, D.; Polkowski, W.; Bruzda, G.; Kudyba, A.; Narciso, J. Interfacial Phenomena between Liquid Si-Rich Si-Zr Alloys and Glassy Carbon. Preprints 2020, 2020020188 (doi: 10.20944/preprints202002.0188.v1).

Abstract

To design and optimize liquid-assisted processes such as reactive infiltration for fabricating refractory SiC/ZrSi2 composites, basic investigations on the interfacial phenomena occurring when liquid Si-based alloys are in contact with C and SiC substrates, are key steps. Indeed, targeted wettability studies may provide helpful indications for finding the suitable set of operating conditions to succeed the fabrication of composites via the reactive infiltration and for predicting the key influencing mechanisms. The wettability of glassy carbon (GC) by two different Si-rich Si-Zr alloys as a function of the Si-content has been investigated by the sessile drop method at T = 1450°C. The more relevant results obtained in terms of equilibrium contact angle values, spreading kinetics, reactivity and developed interface microstructures are reported in the paper and compared with the behaviour previously observed in the Si-27Zr/GC system. The increase of Si-content only weakly affected the overall phenomena observed at the interface, which from the practical point of view means that even the Si-Zr alloys with higher Si-content, as respect to the eutectic alloy (Si-27Zr), could be potentially used as infiltrant materials.

Subject Areas

MMCs; Silicon Carbide; Wetting; Refractory materials; Zr-Silicides

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