Nonreactive spreading at high temperature: molten metals and oxides on molybdenum.
Phys Rev E Stat Nonlin Soft Matter Phys
; 76(4 Pt 1): 041602, 2007 Oct.
Article
em En
| MEDLINE
| ID: mdl-17994999
The spontaneous spreading of small liquid metal (Cu, Ag, Au) and oxide drops on Mo substrates has been studied using a drop transfer setup combined with high-speed video. Under the experimental conditions used in this work, spreading occurs in the absence of interfacial reactions or ridging. The analysis of the spreading data indicates that dissipation at the triple junction (that can be described in terms of a triple-line friction) is playing a dominant role in the movement of the liquid front. This is due, in part, to the much stronger atomic interactions in high-temperature systems when compared to organic liquids. As a result of this analysis, a comprehensive view of spreading emerges in which the strength of the atomic interactions (solid-liquid, liquid-liquid) determines the relative roles of viscous impedance and dissipation at the triple junction in spreading kinetics.
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MEDLINE
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En
Ano de publicação:
2007
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Article