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Morphologies Adopted by Al2O3 Single-Crystal Surfaces in Contact with Cu Droplets
- Source :
- Journal of the American Ceramic Society, Journal of the American Ceramic Society, 2002, 85 (4), pp.961-964. ⟨10.1111/j.1151-2916.2002.tb00199.x⟩, Journal of the American Ceramic Society, Wiley, 2002, 85 (4), pp.961-964. ⟨10.1111/j.1151-2916.2002.tb00199.x⟩
- Publication Year :
- 2004
- Publisher :
- Wiley, 2004.
-
Abstract
- The morphologies of α-Al2O3 single-crystal substrates, annealed in contact with Cu droplets ranging in size from 1 to 10 μm, are observed by high-resolution scanning electron microscopy. After 45 min at 1373 K in a He-5% H2 atmosphere, the alumina substrates display different shapes depending on their orientation and on the addition of small amounts of titanium to the copper. The alumina surface may remain flat, display a hollow of faceted spherical shape at the solid/liquid interface, or develop anisotropic ridges at the triple line. The shape changes result from the diffusion of the components of alumina that takes place to achieve a minimum interfacial energy of the drop–substrate system. Explanations of these features are proposed with a discussion of the conditions under which the Young equation can be used for characterizing wetting at high temperature.
- Subjects :
- Triple point
Scanning electron microscope
020502 materials
Diffusion
chemistry.chemical_element
Mineralogy
02 engineering and technology
021001 nanoscience & nanotechnology
Surface energy
Sessile drop technique
0205 materials engineering
chemistry
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Materials Chemistry
Ceramics and Composites
Wetting
Composite material
0210 nano-technology
Single crystal
ComputingMilieux_MISCELLANEOUS
Titanium
Subjects
Details
- ISSN :
- 15512916 and 00027820
- Volume :
- 85
- Database :
- OpenAIRE
- Journal :
- Journal of the American Ceramic Society
- Accession number :
- edsair.doi.dedup.....5674ba1ec572d89e259c48a7afb8d706