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The role of abnormal grain growth on solid-state dewetting kinetics
- Source :
- Acta Materialia, Acta Materialia, Elsevier, 2014, 81, pp.304-314. ⟨10.1016/j.actamat.2014.08.038⟩, Acta Materialia, 2014, 81, pp.304-314. ⟨10.1016/j.actamat.2014.08.038⟩
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- International audience; Continuous thin films of Pt on A-plane 1 1 2 0 À Á sapphire substrates were dewetted to characterize the morphological evolution and dew-etting kinetics at 800 °C using an oxygen partial pressure of 10 À20 atm. Hole growth was studied, focusing on partially dewetted samples. Four different low-index orientation relationships were found between the Pt and sapphire substrate by electron backscattered diffraction combined with transmission electron diffraction patterns. Abnormal grains adjacent to the holes with a small deviation from one of the low-index orientation relationships were observed. The difference in the heights of the abnormal grains adjacent to the holes (rim-height) is influenced by the initial position of the hole, and the existence of grains with a low-energy interface orientation relationship, and not only by diffusivity rates dictated by surface orientation as described in existing edge-retraction models. The existence of low-index orientation relationships is seen as the driving force for abnormal grain growth in the vicinity of the holes, and is a dominant factor in controlling the dewetting rate of thin metal films on oxide surfaces.
- Subjects :
- Diffraction
Materials science
Polymers and Plastics
EBSD
Interfaces
02 engineering and technology
Abnormal grain growth
Thermal diffusivity
01 natural sciences
Crystallographic orientation
0103 physical sciences
Dewetting
Thin film
010302 applied physics
Metals and Alloys
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Electronic, Optical and Magnetic Materials
Crystallography
Electron diffraction
Chemical physics
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Ceramics and Composites
Sapphire
0210 nano-technology
Solid-state dewetting
Electron backscatter diffraction
Subjects
Details
- ISSN :
- 13596454
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- Acta Materialia
- Accession number :
- edsair.doi.dedup.....082467bd304f29a959a6e17dbd78b38f