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Results for “Dislocation”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Direct Determination of Burgers Vectors of Threading Mixed Dislocations in 4H-SiC c-Plane Wafers Grown by PVT Method
Abstract not provided
Characterization of Dislocations in 4H-SiC Single Crystals at the Initial Growth Stage by Synchrotron X-ray Topography
Abstract not provided
Analysis of Dislocations in PVT-Grown 6H-SiC through Grazing-Incidence X-Ray Topographic Images and Ray-Tracing Simulation
Abstract not provided
Dislocation dynamics modeling of precipitation strengthening in Fe–Ni–Al–Cr ferritic superalloys
Abstract
Misfit dislocations at metal-ceramic and ceramic-ceramic interfaces [Slides]
Abstract not provided.
How grain boundaries affect the efficiency of poly-CdTe solar-cells: A fundamental atomic-scale study of grain boundary dislocation cores using CdTe bi-crystal thin films.
It is now widely accepted that grain boundaries in poly-crystalline CdTe thin film devices have a detrimental effect on the minority carrier lifetimes, the open circuit voltage and therefore the overall solar-cell performance. The goal of this project was to develop a fundamental understanding of the role of grain boundaries in CdTe on the carrier life-time, open-circuit voltage, Voc, and the diffusion of impurities. To achieve this goal, i) CdTe bi-crystals were fabricated with various misorientation angels, ii) the atomic- and electronic structures of the grain boundaries were characterized using scanning transmission electron microscopy (STEM), and iii) first-principles density functional theory modeling was performed on the structures determined by STEM to predict the grain boundary potential. The transport properties and minority carrier lifetimes of the bi-crystal grain boundaries were measured using a variety of approaches, including TRPL, and provided feedback to the characterization and modeling effort about the effectiveness of the proposed models.
Advancing a phase field dislocation dynamics code to model HCP materials
This presentation describes an effort to create an advanced HCP metals and alloys with high strength to weight ratio, biocompatibility, radiation resistance, and fatigue resistance.
Chapter 5: Dislocations in Cadmium Telluride
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Modeling Dislocation Dynamics Near Sound Speeds in Cubic Crystals
Abstract not provided.
HR-EBSD based Characterization of Dislocations in Additive Manufactured 316L Stainless Steel.
Abstract not provided.
SEM/EBSD Analysis of Deformation and Determination of Dislocation Density.
Abstract not provided.