Journal articles
The role of abnormal grain growth on solid-state dewetting kinetics
Abstract : 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.
Cited literature [32 references]
https://hal-amu.archives-ouvertes.fr/hal-01722656
Contributor : Hal Cinam <>
Submitted on : Monday, April 16, 2018 - 1:59:52 PM
Last modification on : Thursday, December 20, 2018 - 9:32:05 PM
Contributor : Hal Cinam <>
Submitted on : Monday, April 16, 2018 - 1:59:52 PM
Last modification on : Thursday, December 20, 2018 - 9:32:05 PM
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