The formation of super-dislocation/micropipe complexes in 6H-SiC

The formation of super-dislocation/micropipe complexes in 6H-SiC

Atomic force microscope images of surface/micropipe intersections on the (0001) growth surface of a 6H-SiC single crystal grown by the physical vapor transport method indicate that micropipes are associated with superdislocations and that micron-scale deposits of a heterogeneous phase are frequently...

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Veröffentlicht in:Materials science forum 1998-01, p.371-374
Hauptverfasser: Giocondi, J, Rohrer, G S, Skowronski, M, Balakrishna, V, Augustine, G, Hobgood, H Mc D, Hopkins, R H
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container_title Materials science forum
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creator Giocondi, J
Rohrer, G S
Skowronski, M
Balakrishna, V
Augustine, G
Hobgood, H Mc D
Hopkins, R H
description Atomic force microscope images of surface/micropipe intersections on the (0001) growth surface of a 6H-SiC single crystal grown by the physical vapor transport method indicate that micropipes are associated with superdislocations and that micron-scale deposits of a heterogeneous phase are frequently found in the vicinity of the defect. Based on our observations, we propose a model for the formation of superdislocation/micropipe complexes that involves the coalescence of unit screw dislocations. The unit dislocations are forced together as large steps grow around heterogeneous material on the surface. (Author)
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title The formation of super-dislocation/micropipe complexes in 6H-SiC
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