A Study of Extended Defects in Surface Damaged Crystals
We have analyzed by transmission electron microscopy silicon and GaAs crystals polished with sandpapers of different grain size. The surface damage induced a crystal permanent convex curvature with a radius of the order of a few meters. The curvature is due to a compressive strain generated in the d...
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MDPI AG
2018-01-01
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| Series: | Crystals |
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| Online Access: | http://www.mdpi.com/2073-4352/8/2/67 |
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doaj-b70046174a074c50ad680ad0be046d012020-11-24T22:23:39ZengMDPI AGCrystals2073-43522018-01-01826710.3390/cryst8020067cryst8020067A Study of Extended Defects in Surface Damaged CrystalsClaudio Ferrari0Corneliu Ghica1Enzo Rotunno2IMEM Institute, National Research Council, 43124 Parma, ItalyNational Institute of Materials Physics, 077125 Magurele, RomaniaIMEM Institute, National Research Council, 43124 Parma, ItalyWe have analyzed by transmission electron microscopy silicon and GaAs crystals polished with sandpapers of different grain size. The surface damage induced a crystal permanent convex curvature with a radius of the order of a few meters. The curvature is due to a compressive strain generated in the damaged zone of the sample. Contrary to what was reported in the literature, the only defects detected by transmission electron microscopy were dislocations penetrating a few microns from the surface. Assuming the surface damage as a kind of continuous indentation, a simple model able to explain the observed compressive strain is given.http://www.mdpi.com/2073-4352/8/2/67curved crystalssurface damaged crystalsdislocation generationcrystal indentation |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Claudio Ferrari Corneliu Ghica Enzo Rotunno |
| spellingShingle |
Claudio Ferrari Corneliu Ghica Enzo Rotunno A Study of Extended Defects in Surface Damaged Crystals Crystals curved crystals surface damaged crystals dislocation generation crystal indentation |
| author_facet |
Claudio Ferrari Corneliu Ghica Enzo Rotunno |
| author_sort |
Claudio Ferrari |
| title |
A Study of Extended Defects in Surface Damaged Crystals |
| title_short |
A Study of Extended Defects in Surface Damaged Crystals |
| title_full |
A Study of Extended Defects in Surface Damaged Crystals |
| title_fullStr |
A Study of Extended Defects in Surface Damaged Crystals |
| title_full_unstemmed |
A Study of Extended Defects in Surface Damaged Crystals |
| title_sort |
study of extended defects in surface damaged crystals |
| publisher |
MDPI AG |
| series |
Crystals |
| issn |
2073-4352 |
| publishDate |
2018-01-01 |
| description |
We have analyzed by transmission electron microscopy silicon and GaAs crystals polished with sandpapers of different grain size. The surface damage induced a crystal permanent convex curvature with a radius of the order of a few meters. The curvature is due to a compressive strain generated in the damaged zone of the sample. Contrary to what was reported in the literature, the only defects detected by transmission electron microscopy were dislocations penetrating a few microns from the surface. Assuming the surface damage as a kind of continuous indentation, a simple model able to explain the observed compressive strain is given. |
| topic |
curved crystals surface damaged crystals dislocation generation crystal indentation |
| url |
http://www.mdpi.com/2073-4352/8/2/67 |
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