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Theoretical study of reactive melt infiltration to fabricate Co-Si/C composites |
| Saqib Shahzad1,†, Khurram Iqbal2,‡, and Zaheer Uddin1,§ |
1 Department of Physics, University of Karachi, Karachi, Sindh 75270, Pakistan;
2 College of Computer Science and Information Systems, Institute of Business Management(IoBM), Karachi, Sindh 75190, Pakistan |
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Abstract 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 5μm and 10μm 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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Received: 11 February 2021
Revised: 03 March 2021
Accepted manuscript online: 16 March 2021
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PACS:
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61.25.Mv
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(Liquid metals and alloys)
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47.70.Fw
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(Chemically reactive flows)
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83.80.Ab
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(Solids: e.g., composites, glasses, semicrystalline polymers)
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Corresponding Authors:
Saqib Shahzad, Khurram Iqbal, and Zaheer Uddin
E-mail: sayyed.saqib@hotmail.com;khurramiqbal.nust@gmail.com;zuddin@uok.edu.pk
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Cite this article:
Saqib Shahzad, Khurram Iqbal, and Zaheer Uddin Theoretical study of reactive melt infiltration to fabricate Co-Si/C composites 2021 Chin. Phys. B 30 116102
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