scholarly journals Formation of Regions with High Energy and Pressure Gradients at the Free Surface of Liquid Dielectric in a Tangential Electric Field

2018 ◽  
Vol 59 (1) ◽  
pp. 79-85 ◽  
Author(s):  
E. A. Kochurin
Keyword(s):  
Free Surface ◽  
Electric Field ◽  
High Energy ◽  
Liquid Dielectric ◽  
Pressure Gradients ◽  
Tangential Electric Field

Measurement of Interface Strength by Laser Pulse induced Spallation

1990 ◽  
Vol 188 ◽  
Author(s):  
V. Gupta ◽  
A. S. Argon
Keyword(s):  
Free Surface ◽  
Laser Pulse ◽  
Pressure Pulse ◽  
Stress Amplitude ◽  
Threshold Level ◽  
High Energy ◽  
Piezoelectric Crystal ◽  
Critical Amplitude ◽  
Laser Spallation ◽  
Simulation Process

ABSTRACTThe strength of planar interfaces between a substrate and a thin coating (1–2 µm) can be measured quite effectively by a laser spallation technique. In this technique a laser pulse of a high energy and a predetermined length is converted into a pressure pulse of a critical amplitude and width that is sent through the substrate toward the free surface with the coating. The compressive pressure pulse is reflected into a tension pulse from the free surface of the coating and loads the coating/substrate interface in tension. The laser flux is tuned to a threshold level at which the interface comes apart. The critical stress amplitude that accomplishes the removal of the coating is determined from a computer simulation process. The simulation itself is verified by means of a piezoelectric crystal probe which is capable of mapping out the profile of the stress pulse generated by the laser pulse.

scholarly journals Revealing the mechanism of electric-field-induced phase transition in antiferroelectric NaNbO3 by in situ high-energy x-ray diffraction

2021 ◽  
Vol 118 (13) ◽  
pp. 132903
Author(s):  
Mao-Hua Zhang ◽  
Changhao Zhao ◽  
Lovro Fulanović ◽  
Jürgen Rödel ◽  
Nikola Novak ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray
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