Basal Plane Dislocation Multiplication via the Hopping Frank-Read Source Mechanism and Observations of Prismatic Glide in 4H-SiC

Huan Huan Wang; Sha Yan Byrapa; F. Wu; Balaji Raghothamachar; Michael Dudley; Edward Sanchez; Darren M. Hansen; Roman Drachev; Stephan G. Mueller; Mark J. Loboda

doi:10.4028/www.scientific.net/MSF.717-720.327

Paper Titles

Carrier Diffusivity in Highly Excited Bulk SiC, GaN, and Diamond Crystals by Optical Probes
p.309

Critical Conditions of Misfit Dislocation Formation in 4H-SiC Epilayers
p.313

Fourier Transform Analysis of Basal Plane Dislocation Structure in Repeated A-Face Grown Crystals
p.319

X-Ray Three-Dimensional Topography Imaging of Basal-Plane and Threading-Edge Dislocations in 4H-SiC
p.323

Basal Plane Dislocation Multiplication via the Hopping Frank-Read Source Mechanism and Observations of Prismatic Glide in 4H-SiC
p.327

Identification of the Basal Plane Component of the Burgers Vector of Small Dislocations in 6H SiC Using Birefringence Microscopy
p.331

Effects of Nitrogen Doping on the Morphology of Basal Plane Dislocations in 4H-SiC Epilayers
p.335

Analysis of Dislocations Nucleated after Nano Indentation Tests at Room Temperature in 4H-SiC
p.339

Synchrotron X-Ray Topography Studies of the Propagation and Post-Growth Mutual Interaction of Threading Growth Dislocations with C-Component of Burgers Vector in PVT-Grown 4H-SiC
p.343

HomeMaterials Science ForumMaterials Science Forum Vols. 717-720Basal Plane Dislocation Multiplication via the...

Basal Plane Dislocation Multiplication via the Hopping Frank-Read Source Mechanism and Observations of Prismatic Glide in 4H-SiC

Abstract:

In this paper, we report on the synchrotron white beam topographic (SWBXT) observation of “hopping” Frank-Read sources in 4H-SiC. A detailed mechanism for this process is presented which involves threading edge dislocations experiencing a double deflection process involving overgrowth by a macrostep (MP) followed by impingement of that macrostep against a step moving in the opposite direction. These processes enable the single-ended Frank-Read sources created by the pinning of the deflected basal plane dislocation segments at the less mobile threading edge dislocation segments to “hop” from one slip plane to other parallel slip planes. We also report on the nucleation of 1/3< >{ } prismatic dislocation half-loops at the hollow cores of micropipes and their glide under thermal shear stress.

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Periodical:

Materials Science Forum (Volumes 717-720)

Pages:

327-330

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.717-720.327

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Online since:

May 2012

Authors:

Huan Huan Wang, Sha Yan Byrapa, F. Wu, Balaji Raghothamachar, Michael Dudley, Edward Sanchez, Darren M. Hansen, Roman Drachev, Stephan G. Mueller, Mark J. Loboda

Keywords:

Basal Plane, Burgers Vector, Dislocation, Frank-Read Source, Prismatic Plane, Slip System

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References

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