Cracks and dislocations at Vickers, Berkovich and cube corner indentations in (0001) GaN single crystals
(0001) GaN single crystals having a thickness of 3.4 mm and a density of in‐grown dislocations of 3.5 x 106 cm‐2 have been deformed at room temperature using a cube corner, a Berkovich and a Vickers indenter, respectively. Cube corner indentations were performed in a scanning electron microscope in...
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Published in | Physica status solidi. C Vol. 10; no. 1; pp. 76 - 79 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin
WILEY-VCH Verlag
01.01.2013
WILEY‐VCH Verlag Wiley Subscription Services, Inc |
Subjects | |
Online Access | Get full text |
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Summary: | (0001) GaN single crystals having a thickness of 3.4 mm and a density of in‐grown dislocations of 3.5 x 106 cm‐2 have been deformed at room temperature using a cube corner, a Berkovich and a Vickers indenter, respectively. Cube corner indentations were performed in a scanning electron microscope in order to observe the deformation in situ. Subsequently, cracks and dislocations at the indentations were investigated by means of optical microscopy, scanning electron microscopy in secondary electron contrast and cathodoluminescence imaging. The arrangement of dislocations is determined by the symmetry of the indented surface. In contrast, the formation of cracks depends on both the shape and the orientation of the indenter. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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Bibliography: | ark:/67375/WNG-Z25NZ5XT-Z Graduiertenförderung des Landes Sachsen-Anhalt istex:D2604BFF4A7784455B61A080B60EFF0DA232ADAA ArticleID:PSSC201200388 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1862-6351 1610-1642 |
DOI: | 10.1002/pssc.201200388 |