Designing SiC/IrSi3 Composites for Aggressive Environments: Wetting Characteristics of the Liquid Si-Ir Eutectics in Contact with SiC and C-Materials
Javier Narciso, Antonio Daniel Camarano, Rada Novakovic, Donatella Giuranno
TL;DR
This paper studies how liquid silicon-iridium mixtures interact with silicon carbide and carbon materials at high temperatures to improve composite fabrication.
Contribution
The study provides new insights into the wetting behavior of Ir-Si eutectics on SiC and C materials for high-temperature composite fabrication.
Findings
Wetting characteristics of liquid Ir-Si eutectics on SiC and C materials were analyzed between 1350–1400 °C.
Interfacial phenomena and microstructural evolution correlate with process parameters and thermodynamics.
Experimental data and thermodynamic models support numerical studies of infiltration processes.
Abstract
The design and fabrication of metal matrix materials (MMCs), as well as the densification and joining of ceramic matrix composites (CMC), are still very challenging. For SiC- and C-based composites, liquid-assisted processing routes, such as the spontaneous infiltration process, emerge among the most cost-effective processes. To succeed in Ir-Si/SiC refractory composite fabrication by spontaneous infiltration, the wetting characteristics of the Ir-Si/SiC system, the surface and transport properties (surface tension and viscosity) of liquid Ir-Si alloys, and microstructural evolution at the interfaces formed between solid SiC (or C) with Ir-Si melt, have been carefully examined. Specifically, the wettability and interaction phenomena occurring at the Si-Ir eutectics/SiC interface as a function of temperature were investigated in the temperature range of T = 1350–1400 °C by the sessile…
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Taxonomy
TopicsAdvanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced Surface Polishing Techniques