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Copper crystals on the (11 $$\bf{\bar{2}}$$ 0) sapphire plane: orientation relationships, triple line ridges and interface shape equilibrium
- Source :
- Journal of Materials Science. 48:3013-3026
- Publication Year :
- 2012
- Publisher :
- Springer Science and Business Media LLC, 2012.
-
Abstract
- The orientation relationships (ORs) of copper crystals on a $$ (11\bar{2}0) $$ sapphire substrate equilibrated at 1253 K are presented. They barely depend on the procedures used in sample preparation, i.e. dewetting of a copper film in the liquid state or in the solid state. The most frequent OR found is Cu(111) || Al2O3 $$ (11\bar{2}0) $$ and Cu $$ [1\bar{1}0] $$ within few degrees from Al2O3[0001]. A secondary, lower frequency OR is also observed: Cu(001) || Al2O3 $$ (11\bar{2}0) $$ with Cu $$ [1\bar{1}0] $$ within a few degrees from either Al2O3 $$ [1\bar{1}00] $$ or Al2O3[0001]. These ORs do not follow the Fecht and Gleiter model which proposes that dense directions of the metal should align with dense directions of the oxide. On annealing, even at a temperature about half of the melting point of sapphire, fast diffusion of sapphire at the copper/sapphire interface is observed: the copper particles tend to achieve their interfacial equilibrium shapes by sinking into the substrate, and sapphire ridges form at the triple line. Finally, it is shown that the Cu(111) || Al2O3 $$ (11\bar{2}0) $$ interface remains flat at the atomic scale, and is therefore part of the copper/sapphire equilibrium interfacial shape.
- Subjects :
- 010302 applied physics
Materials science
Annealing (metallurgy)
Mechanical Engineering
Oxide
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Atomic units
Copper
Molecular physics
Metal
chemistry.chemical_compound
Crystallography
chemistry
Mechanics of Materials
visual_art
0103 physical sciences
Melting point
Sapphire
visual_art.visual_art_medium
General Materials Science
Dewetting
0210 nano-technology
Subjects
Details
- ISSN :
- 15734803 and 00222461
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science
- Accession number :
- edsair.doi...........9352b3815bfb41876a14159df28f7f77