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Erschienen in: Metallurgical and Materials Transactions B 3/2009

01.06.2009

Wetting of Al/Sapphire (0001) System: Measurement Effect and Affecting Factors

verfasst von: Joaquin Aguilar-Santillan

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 3/2009

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Abstract

Dynamic surface tension measurements of molten aluminum droplets on sapphire (0001) have been carried out at a PO2 of 10−15 Pa in a temperature range of 1073 to 1673 K. The aim is to demonstrate that the contact angles reported in the literature from 65 to 145 deg do not meet high-temperature adhesion requirements and often lead to incorrect measurements. This article demonstrates the use of modern techniques of analysis both in computation and image analysis, to revisit previous data that often show large variability. A sessile drop (SD) experiment and an image process through the solution and optimization of the Laplace equation of capillarity are addressed through MATLAB software. The approach delivers contact angles and surface tensions controlled with PO2, temperature, and time. The details of the method and material properties affecting the system wettability by molten aluminum are also described.

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Fußnoten
1
MATLAB is a registered trademark of The Mathworks, Inc., Natick, MA.
 
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Metadaten
Titel
Wetting of Al/Sapphire (0001) System: Measurement Effect and Affecting Factors
verfasst von
Joaquin Aguilar-Santillan
Publikationsdatum
01.06.2009
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 3/2009
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-009-9237-z

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