Survey on wetting of SiC by molten metals

Liu, G.W.; Muolo, Maria Luigia; Valenza, Fabrizio; Passerone, A.

doi:10.1016/j.ceramint.2010.01.001

Cited by 175 publications

(70 citation statements)

References 91 publications

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“…This depends on the reaction between the metal and SiC. A recent review by Lui et al [251] shows that the reaction between metals and SiC can be grouped into four groups -see Table 1. Most of the metals in group 1 have large contact angles indicating nonwettability.…”

Section: Diffusion Of Fission Products In Sicmentioning

confidence: 99%

Diffusion of fission products and radiation damage in SiC

Malherbe

2013

J. Phys. D: Appl. Phys.

109

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A major problem with most of the present nuclear reactors is their safety in terms of the release of radioactivity into the environment during accidents. In some of the future nuclear reactor designs, i.e. Generation IV reactors, the fuel is in the form of coated spherical particles, i.e. TRISO (acronym for Triple Coated Isotropic) particles. The main function of these coating layers is to act as diffusion barriers for radioactive fission products, thereby keeping these fission products within the fuel particles, even under accident conditions. The most important coating layer is composed of polycrystalline 3C-SiC. This paper reviews the diffusion of the important fission products (silver, caesium, iodine and strontium) in SiC. Because radiation damage can induce and enhance diffusion, the paper also briefly reviews damage created by energetic neutrons and ions at elevated temperatures, i.e. the temperatures at which the modern reactors will operate, and the annealing of the damage. The interaction between SiC and some fission products (such as Pd and I) is also briefly discussed. As shown, one of the key advantages of SiC is its radiation hardness at elevated temperatures, i.e. SiC is not amorphized by neutron or bombardment at substrate temperatures above 350°C. Based on the diffusion coefficients of the fission products considered, the review shows that at the normal operating temperatures of these new reactors (i.e. less than 950°C) the SiC coating layer is a good diffusion barrier for these fission products. However, at higher temperatures the design of the coated particles needs to be adapted, possibly by adding a thin layer of ZrC.

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Section: Diffusion Of Fission Products In Sicmentioning

confidence: 99%

Diffusion of fission products and radiation damage in SiC

Malherbe

2013

J. Phys. D: Appl. Phys.

109

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“…The focus is on the effects on fluid flow of surface growth from a supersaturated solution (Kang et al, 2003(Kang et al, , 2004(Kang et al, , 2007Kang, Zhang, Chen, & He, 2002;Lu et al, 2009). The study is motivated by the problem of Si infiltration into C preforms (Bougiouri et al, 2006;Dezellus et al, 2003;Dezellus & Eustathopoulos, 2010;Einset, 1996Einset, , 1998Eustathopoulos et al, 1999;Hillig et al, 1975;Israel et al, 2010;Liu et al, 2010;Messner & Chiang, 1990;Mortensen et al, 1997;Voytovych et al, 2008). Several inconsistencies exist between the experiments and the models, as well as the simulation conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Specifically, ceramization through liquid Si infiltration, or impregnation, is necessary for high-temperature applications such as tribology (Gadow, 2000). In this process, the reaction between Si and C to form silicon carbide (SiC) has been the subject of intense research activity, since it coincides with a wetting transition (Bougiouri et al, 2006;Dezellus et al, 2003;Dezellus & Eustathopoulos, 2010;Einset, 1996Einset, , 1998Eustathopoulos et al, 1999;Hillig et al, 1975;Israel et al, 2010;Liu et al, 2010;Messner & Chiang, 1990;Mortensen et al, 1997;Voytovych et al, 2008). In other words, without this reaction, infiltration would not occur (Bougiouri et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…The motivating problem for our investigation is the reactive infiltration of molten silicon (Si) into carbon (C) (Bougiouri, Voytovych, Rojo-Calderon, Narciso, & Eustathopoulos, 2006;Dezellus & Eustathopoulos, 2010;Dezellus, Hodaj, & Eustathopoulos, 2003;Einset, 1996Einset, , 1998Eustathopoulos, Nicholas, & Drevet, 1999;Hillig, Mehan, Morelock, DeCarlo, & Laskow, 1975;Israel et al, 2010;Liu, Muolo, Valenza, & Passerone, 2010;Messner 302 D. Sergi et al & Chiang, 1990;Mortensen, Drevet, & Eustathopoulos, 1997;Voytovych, Bougiouri, Calderon, Narciso, & Eustathopoulos, 2008). This process is of particular relevance to industrial practices which involve the processing of carbon and graphite materials (Gadow, 2000;Gadow & Speicher, 2000;Krenkel, 2005;Paik et al, 2002;Salamone, Karandikar, Marshall, Marchant, & Sennett, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lattice Boltzmann simulations on the role of channel structure for reactive capillary infiltration

Sergi

Grossi

Leidi

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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It is widely recognized that the structure of porous media is of relevance for a variety of mechanical and physical phenomena. The focus of the present work is on capillarity, a pore-scale process occurring at the micron scale. We attempt to characterize the influence of pore shape for capillary infiltration by means of Lattice Boltzmann simulations in 2D with reactive boundaries leading to surface growth and ultimately to pore closure. The systems under investigation consist of single channels with different simplified morphologies: namely, periodic profiles with sinusoidal, step-shaped and zigzag walls, as well as constrictions and expansions with rectangular, convex and concave steps. This is a useful way to break the complexity of typical porous media down into basic structures. The simulations show that the minimum radius alone fails to properly characterize the infiltration dynamics. The structure of the channels emerges as the dominant property controlling the process. A factor responsible for this behavior is identified as being the occurrence of the pinning of the contact line. It turns out that the optimal configuration for the pore structure arises from the packing of large particles with round shapes. In this case, the probability of having wide and straight flow paths is higher. Faceted surfaces with sharp edges should be avoided because of the phenomenon of pinning near narrow-to-wide parts. This study is motivated by the infiltration of molten metals into carbon preforms. This is a manufacturing technique for ceramic components devised for advanced applications. Guidelines for experimental work are discussed.

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“…However, the poor wettability between SiC and Cu would lead to flocculation of SiC and segregation from the matrix, and decrease in sinterability and thermal conductivity of the composites [5][6][7]. In addition, Si in SiC at elevated temperature is partially dissolved in Cu forming a Cu(Si) solid solution, and the dissolved Si reduces the thermal conductivity of Cu/SiC composites [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis Of SiC/Cu Composite Powders From Polycarbosilane And Cupric Nitrate Trihydrate

Bang¹,

Yim²,

Riu³

et al. 2015

Archives of Metallurgy and Materials

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SiC/Cu composite powders with the barrier coating of SiC-Al onto SiC powders were synthesized from Al-containing polycarbosilane precursor and Cu-nitrate hydrate. Curing at 200 o C and high temperature pyrolysis at 1600 o C was used to achieve the crystallization of precursor, forming the SiC-Al coating on the surface of SiC powders. A core-shell structure with the core of SiC and the shell of Cu was constructed by calcination and hydrogen-reduction of Cu nitrate hydrate. XRD and SEM analysis revealed that the β-SiC and 4H-SiC phases were formed on the surface of the initial α-SiC powders. Also, it was observed by EDX mapping that core powders of SiC were homogeneously surrounded with the fine Cu particles on their surface.

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Survey on wetting of SiC by molten metals

Cited by 175 publications

References 91 publications

Diffusion of fission products and radiation damage in SiC

Diffusion of fission products and radiation damage in SiC

Lattice Boltzmann simulations on the role of channel structure for reactive capillary infiltration

Synthesis Of SiC/Cu Composite Powders From Polycarbosilane And Cupric Nitrate Trihydrate

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