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Validity of the Sessile Drop Test of the Molten Al-Mg Alloys on SiO2 under Various Atmospheres  

Jang, Hyung-Min (Department of Materials Science and Engineering, Korea University)
Lee, Chang-Myeon (Department of Materials Science and Engineering, Korea University)
Lee, Joon-Ho (Department of Materials Science and Engineering, Korea University)
Lee, Jae-Hoon (Advanced Materials Division, Korea Institute of Industrial Technology)
Lee, Jae-Chul (Department of Materials Science and Engineering, Korea University)
Publication Information
Korean Journal of Metals and Materials / v.47, no.6, 2009 , pp. 383-390 More about this Journal
Abstract
The effects that processing atmospheres and alloy composition have on the wetting characteristics of Al-Mg alloys on the $SiO_{2}$ substrate were investigated by measuring the wetting angles. It was observed that the wetting behavior of the Al-Mg alloys on the $SiO_{2}$ substrate vary depending on the Mg content of the alloys and atmospheres. The results showed that the contact angle decreases with increasing Mg content, angle is generally larger in the $N_{2}$ atmosphere than in the Ar atmosphere. We discussed the validity of the results obtained from the wetting test on the basis of recent theories and the results observed from the actual penetration tests.
Keywords
wetting; contact angle; atmosphere; sessile drop; Al alloys;
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