Abstract
The wetting behavior of Al–Si–Mg alloys on Si3N4/Si substrates has been investigated using the sessile drop technique. Based on a Taguchi experiment design, the effect of the following processing parameters on the contact angle (θ) and surface tension (σLV) was studied: processing time and temperature, atmosphere (Ar and N2), substrate surface condition (with and without a silicon wafer), as well as the Mg and Si contents in the aluminium alloy. In nitrogen, non-wetting conditions prevail during the isothermal events while in argon a remarkable non-wetting to wetting transition leads to contact angles θ as low as 11±3° and a liquid surface tension σLV of 33± 10×10-5 kJ/m2. According to the multiple analysis of variance (Manova), the optimum conditions for minimizing the values of θ and σLV are as follows: temperature of 1100 °C, processing time of 90 min, argon atmosphere, no use of a silicon wafer, and the use of the Al-18% Mg-1% Si alloy. A verification test conducted under the optimized conditions resulted in a contact angle of θ=9±3° and a surface tension of σLV=29± 9×10-5 kJ/m2, both indicative of excellent wetting.
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68.03.Cd; 81.05.Bx; 68.08.Bc; 05.70.-a; 61.10.Nz
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de la Peña, J., Pech-Canul, M. Wetting behavior of Al–Si–Mg alloys on Si3N4/Si substrates: optimization of processing parameters. Appl. Phys. A 91, 545–550 (2008). https://doi.org/10.1007/s00339-008-4438-x
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DOI: https://doi.org/10.1007/s00339-008-4438-x