Non-Equilibrium Effects of Interaction of Laser Discharge with Hemisphere-Cylinder in Supersonic Flow

2018 ◽  
Author(s):  
Nadia Kianvashrad ◽  
Doyle D. Knight
Keyword(s):  
Supersonic Flow ◽  
Laser Discharge ◽  
Non Equilibrium

DC Discharge Electronic Non-equilibrium Effects Investigations on a M = 2 Rarefied Supersonic Flow Over a Flat Plate

2018 ◽  
Vol 38 (3) ◽  
pp. 557-571
Author(s):  
Sabrina Hamdoun ◽  
Bachir Liani ◽  
Amina Ait Oumeziane ◽  
Jean-Denis Parisse
Keyword(s):  
Supersonic Flow ◽  
Flat Plate ◽  
Dc Discharge ◽  
Non Equilibrium

scholarly journals Effect of Off-Body Laser Discharge on Drag Reduction of Hemisphere Cylinder in Supersonic Flow-Part II

2018 ◽  
Author(s):  
Nadia Kianvashrad ◽  
Doyle D. Knight ◽  
Stephen P. Wilkinson ◽  
Amanda Chou ◽  
George B. Beeler ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Laser Discharge ◽  
Flow Part

scholarly journals Effect of Off-Body Laser Discharge on Drag Reduction of Hemisphere Cylinder in Supersonic Flow

2017 ◽  
Author(s):  
Nadia Kianvashrad ◽  
Doyle D. Knight ◽  
Stephen P. Wilkinson ◽  
Amanda Chou ◽  
Robert A. Horne ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Laser Discharge

Application of analytical electron microscopy to studies of equilibrium and non-equilibrium segregation in materials

1992 ◽  
Vol 50 (2) ◽  
pp. 1214-1215
Author(s):  
Edward A Kenik
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Extended Defects ◽  
Probe Diameter ◽  
Specimen Holder ◽  
Analytical Electron ◽  
Scanning Transmission ◽  
Solute Atoms ◽  
Equilibrium Segregation ◽  
Non Equilibrium

Segregation of solute atoms to grain boundaries, dislocations, and other extended defects can occur under thermal equilibrium or non-equilibrium conditions, such as quenching, irradiation, or precipitation. Generally, equilibrium segregation is narrow (near monolayer coverage at planar defects), whereas non-equilibrium segregation exhibits profiles of larger spatial extent, associated with diffusion of point defects or solute atoms. Analytical electron microscopy provides tools both to measure the segregation and to characterize the defect at which the segregation occurs. This is especially true of instruments that can achieve fine (<2 nm width), high current probes and as such, provide high spatial resolution analysis and characterization capability. Analysis was performed in a Philips EM400T/FEG operated in the scanning transmission mode with a probe diameter of <2 nm (FWTM). The instrument is equipped with EDAX 9100/70 energy dispersive X-ray spectrometry (EDXS) and Gatan 666 parallel detection electron energy loss spectrometry (PEELS) systems. A double-tilt, liquid-nitrogen-cooled specimen holder was employed for microanalysis in order to minimize contamination under the focussed spot.

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