A Comparative Study of the Diffuse-Interface Model and Sharp-Interface Model in the Soldering Related Wetting Spreading Systems
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Key Lab for Robot &Welding Automation of Jiangxi Province, Mechanical & Electrical Engineering School, Nanchang University, Nanchang 330031, China
2
The Engineering Training Center of Nanchang University, Mechanical & Electrical Engineering School, Nanchang University, Nanchang 330031, China
*
Authors to whom correspondence should be addressed.
Metals 2019, 9(9), 944; https://doi.org/10.3390/met9090944
Received: 25 July 2019
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Revised: 17 August 2019
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Accepted: 22 August 2019
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Published: 28 August 2019
(This article belongs to the Special Issue Multiscale Modeling of Materials and Processes)
A typical dissolution wetting system, Bi-Sn eutectic filler metal over a Bi substrate in a high-purity argon atmosphere was investigated first using real-time in situ hot stage microscopy for the extensive use of the sharp-interface model and the diffuse-interface model in the modeling of brazing/soldering related wetting systems. Subsequently, the similarities and differences between the aforementioned models in describing the issues of the wetting and spreading interfaces were discussed in terms of soldering definition and theoretical formula derivation. It is noted that (i) the mutual dissolution diffusion between the liquid Bi-Sn solder and Bi substrate were obvious. As a result, the composition and volume of the liquid solder is constantly changing during the wetting and spreading process; (ii) the sharp-interface model is a special case of the diffuse-interface model of the Cahn-Hilliard nonlinear diffuse-equation under the convective dominant condition; (iii) although there are differences between the sharp-interface model and the diffuse-interface model, both of them could be used in brazing/soldering related processes; and, (iv) the agreement between the experimental and simulation results of the sharp-interface model is not as good as that of the diffuse-interface model, which can be attributed to the effects of the elements’ diffusion and the phase transformation.
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Keywords:
dissolutive wetting; diffuse-interface model; sharp-interface model; phase field; Cahn-Hilliard equation
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MDPI and ACS Style
Liu, G.; Zhang, J.; Lei, M.; Li, Y.; Li, X. A Comparative Study of the Diffuse-Interface Model and Sharp-Interface Model in the Soldering Related Wetting Spreading Systems. Metals 2019, 9, 944. https://doi.org/10.3390/met9090944
AMA Style
Liu G, Zhang J, Lei M, Li Y, Li X. A Comparative Study of the Diffuse-Interface Model and Sharp-Interface Model in the Soldering Related Wetting Spreading Systems. Metals. 2019; 9(9):944. https://doi.org/10.3390/met9090944
Chicago/Turabian StyleLiu, Guanpeng, Jianyang Zhang, Min Lei, Yulong Li, and Xuewen Li. 2019. "A Comparative Study of the Diffuse-Interface Model and Sharp-Interface Model in the Soldering Related Wetting Spreading Systems" Metals 9, no. 9: 944. https://doi.org/10.3390/met9090944
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