Towards optimization of SiC/CoSi2 composite material manufacture via reactive infiltration: Wetting study of Si–Co alloys on carbon materials

Caccia, Mario; Amore, S.; Giuranno, Donatella; Novaković, R.; Ricci, E.; Narciso, J.

doi:10.1016/j.jeurceramsoc.2015.07.016

Cited by 54 publications

(56 citation statements)

References 42 publications

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“…Knowledge of the thermodynamic and surface properties of liquid Co-Si alloys is an important prerequisite for the optimization and design of new Co-Si / C composite materials [1,8].…”

Section: Smentioning

confidence: 99%

“…Me-Si (Me = Ni, Co, Fe). Among silicon alloys investigated, high temperature behaviour of liquid Co-Si/solid C system has become increasingly important for development of composite materials and production methods [8]. The studies on the Co-Si system mainly concern the investigation of its solid solution alloys [9][10][11][12][13][14][15][16], while only few articles describe the mixing properties of liquid alloys [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic, surface and structural properties of liquid Co-Si alloys

Novaković

Giuranno

Caccia

et al. 2016

Journal of Molecular Liquids

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The knowledge of thermophysical properties of liquid Co-Si alloys is a key requirement for manufacturing of composite materials by infiltration method. Despite this need, the experimental and predicted property data of the Co-Si system are scarce and often inconsistent between the various sources. In the present work the mixing behaviour of Co-Si melts has been analyzed through the study of the concentration dependence of various thermodynamic, surface (surface tension and surface composition) and structural properties (concentration fluctuations in the long-wavelength limit and chemical short-range order parameter) in the framework of the Compound Formation Model (CFM) and Quasi Chemical Approximation for regular solutions (QCA). In addition, the surface tension of the Co 22.5 Si 77.5 (in at %) eutectic alloy, that is proposed to be used as the infiltrant, has been measured by the pendant drop method at temperatures ranging from 1593 to 1773 K. The results obtained were discussed with respect to both, temperature and concentration, and subsequently compared with the model predictions and literature data.

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“…Knowledge of the thermodynamic and surface properties of liquid Co-Si alloys is an important prerequisite for the optimization and design of new Co-Si / C composite materials [1,8].…”

Section: Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic, surface and structural properties of liquid Co-Si alloys

Novaković

Giuranno

Caccia

et al. 2016

Journal of Molecular Liquids

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“…In order to succeed in designing and manufacturing such composites, key know-how could come from fundamental investigations of thermodynamic and thermophysical properties of the melt phase, such as surface properties, density, and viscosity [24][25][26]. In parallel, the wetting characteristics and reactivity at the alloy/preform interfaces ought to be evaluated [27][28][29][30][31][32]. The as-collected knowledge can be profitably used as input data for optimizing the infiltration process [16,33].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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To succeed in the design and optimization of liquid-assisted processes such as reactive infiltration for the fabrication of tailored refractory SiC/ZrSi 2 composites, the interfacial phenomena that occur when Si-rich Si-Zr alloys are in contact with glassy carbon (GC) were investigated for the first time by the sessile drop method at T = 1450 • C. Specifically, two different Si-rich Si-Zr alloys were selected, and the obtained results in terms of wettability, spreading kinetics, reactivity, and developed interface microstructures were compared with experimental observations that were previously obtained for the liquid Si-rich, Si-Zr, near-eutectic composition (i.e., Si-10 at.%Zr) that was processed under the same operating conditions. The increase of the Si content only weakly affected the overall phenomena that were observed at the interface. From the practical point of view, this means that even Si-Zr alloys with a higher Si content, with respect to the near eutectic alloy, may be potentially used as infiltrant materials.

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“…The mechanism proposed by Eustathopoulos et al to explain reactive wetting and infiltration of Si and Si-Me alloys on porous and non-porous carbon materials, respectively, suggests that the infiltration velocity (U inf ) at a given temperature is equal or at least of the same order of magnitude than the spreading velocity (U spr ) [22,32]. Several wetting studies of Si-Me (Me=Cu, Ni, Co, Al) on carbon substrates have reported that, as predicted by the aforementioned mechanism, the influence of alloy composition on U spr is very weak [19,[33][34][35], and thus, U inf can be assumed as independent of the alloy composition for Si-rich alloys. Therefore, it is reasonable to assume that the optimal conditions obtained for the infiltrations performed with pure Si are the same as for infiltrations performed with Si-rich Fe-Si alloys.…”

Section: Optimization Of the Infiltration Processmentioning

confidence: 99%

“…Si is a very brittle material with poor mechanical properties that limits the performance of the composite. However, it is possible to partially replace this Si phase with a metal silicide phase (Me x Si y ) by infiltrating the preform with a Si-rich Si-Me alloy [18][19][20][21]. By selecting a metal that forms a silicide with better mechanical properties than Si, the performance of the final material can be improved.…”

Section: Introductionmentioning

confidence: 99%

Effects of Fe addition on the mechanical and thermo-mechanical properties of SiC/FeSi2/Si composites produced via reactive infiltration

Camarano

Caccia

Molina

et al. 2016

Ceramics International

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Cite this article as: A. Camarano, M. Caccia, J.M. Molina and J. Narciso, Effects of fe addition on the mechanical and thermo-mechanical properties of SiC/FeSi 2 /si composites produced via reactive infiltration, Ceramics International, http://dx. ABSTRACT:Remaining silicon in SiC-based materials produced via reactive infiltration limits their use in high-temperature applications due to the poor mechanical properties of silicon: low fracture toughness, extreme fragility and creep phenomena above 1000ºC. In this paper SiC-FeSi2 composites are fabricated by reactive infiltration of Si-Fe alloys into porous Cf/C preforms. The resulting materials are SiC/FeSi2 composites, in which remaining silicon is reduced by formation of FeSi2. For the richest Fe alloys (35 wt.% Fe) a nominal residual silicon content below 1% has been observed. However this, the relatively poor mechanical properties (bending strength) measured for those resulting materials can be explained by the thermal mismatch of FeSi2 and SiC, which weakens the interface and does even generate new porosity, associated with a debonding phenomenon between the two phases.

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Towards optimization of SiC/CoSi2 composite material manufacture via reactive infiltration: Wetting study of Si–Co alloys on carbon materials

Cited by 54 publications

References 42 publications

Thermodynamic, surface and structural properties of liquid Co-Si alloys

Thermodynamic, surface and structural properties of liquid Co-Si alloys

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

Effects of Fe addition on the mechanical and thermo-mechanical properties of SiC/FeSi2/Si composites produced via reactive infiltration

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