A Model for the Numerical Simulation of Liquid Silicon Infiltration into Porous Carbon/Carbon Preforms

Iqbal, Khalid; Dwivedi, Sudhanshu; Cadet, Stevens

doi:10.1002/9781119423829.ch3

Cited by 1 publication

(2 citation statements)

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“…For this system, numerical studies provide the best prediction of optimal parameters for minimum conversion time. [14] 0.06 The greatest infiltration height is shown for the Co-Si alloy occurring at 62.5% of silicon. The infiltrations are 0.056685 m and 0.226738 m for 5 µm and 10 µm, respectively.…”

Section: Resultsmentioning

confidence: 96%

“…Figure 1 illustrates an experimental setup; describing the infiltration process within the capillary of the porous carbon performed by molten metalsilicon (M-Si) using a conventional furnace in a vacuum. [13,14] To investigate the infiltration kinetics, study of this process is essential, by assuming that the formation of SiC at interface only depends on the Si content rather than C, the threshold activity, a si (SiC), can be calculated using the following equations: [15][16][17][18][19][20][21] Si (in liquid Co) + C(s) → SiC(s),…”

Section: Introductionmentioning

confidence: 99%

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Theoretical study of reactive melt infiltration to fabricate Co-Si/C composites

Shahzad¹,

Iqbal²,

Uddin³

2021

Chinese Phys. B

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Cobalt-silicon based carbon composites (Co–Si/C) have established a noteworthy consideration in recent years as a replacement for conventional materials in the automotive and aerospace industries. To achieve the composite, a reactive melt infiltration process (RMI) is used, in which a melt impregnates a porous preform by capillary force. This method promises a high-volume fraction of reinforcement and can be steered in such a way to get the good “near-net” shaped components. A mathematical model is developed using reaction-formed Co–Si alloy/C composite as a prototype system for this process. The wetting behavior and contact angle are discussed; surface tension and viscosity are calculated by Wang’s and Egry’s equations, respectively. Pore radii of 5 μm and 10 μm are set as a reference on highly oriented pyrolytic graphite. The graphs are plotted using the model, to study some aspects of the infiltration dynamics. This highlights the possible connections among the various processes. In this attempt, the Co–Si (62.5 at.% silicon) alloy’s maximum infiltration at 5 μm and 10 μm radii are found as 0.05668 m at 125 s and 0.22674 m at 250 s, respectively.

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Section: Resultsmentioning

confidence: 96%