scholarly journals Temporal Evolution of Pressure Generated by a Nanosecond Laser Pulse Used for Assessment of Adhesive Strength of the Tungsten–Zirconium–Borides Coatings

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7111
Author(s):  
Joanna Radziejewska ◽  
Agata Kaczmarek ◽  
Tomasz Mościcki ◽  
Jacek Hoffman
Keyword(s):  
Shock Wave ◽  
Laser Pulse ◽  
Adhesive Strength ◽  
Polyvinylidene Fluoride ◽  
Steel Substrate ◽  
Pulse Generation ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Water Medium ◽  
Zirconium Boride

The article presents theoretical and experimental study of shock waves induced by a nanosecond laser pulse. Generation of surface plasma pressure by ablation of the graphite absorption layer in water medium and shock wave formation were analyzed theoretically and experimentally. The amplitude and temporal variation of the shock wave pressure was determined basing on a proposed hydrodynamic model of nanosecond laser ablation and experimentally verified with use of a polyvinylidene fluoride (PVDF) piezoelectric-film sensor. The determined pressure wave was used for examination of adhesive strength of tungsten–zirconium–boride coatings on steel substrate. The magnetron sputtered (MS) W–Zr–B coatings show good adhesion to the steel substrate. The obtained experimental results prove the correctness of the proposed model as well as the suitability of the procedure for assessment of adhesive strength.

Effect of a fiber-capillary structure on nanosecond laser pulse propulsion

2017 ◽  
Vol 124 (1) ◽  
Author(s):  
Haichao Yu ◽  
Lugui Cui ◽  
Kai Zhang ◽  
Jun Yang ◽  
Hanyang Li
Keyword(s):  
Laser Pulse ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Capillary Structure

THERMAL AND MECHANICAL RESPONSES OF GOLD FILMS DURING NANOSECOND LASER-PULSE HEATING

1994 ◽  
Vol 7 (3) ◽  
pp. 175-188 ◽  
Author(s):  
Taiqing Qiu ◽  
Chang-Lin Tien ◽  
Mark A. Shannon ◽  
Richard E. Russo
Keyword(s):  
Laser Pulse ◽  
Pulse Heating ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Gold Films ◽  
Mechanical Responses ◽  
Laser Pulse Heating

scholarly journals Determination of energy gain time dependent in D+T mixture with calculating total energy deposited of deuteron beam in hot spot

2014 ◽  
Vol 1 (1) ◽  
pp. 7-21
Author(s):  
S. N. Hoseinimotlagh ◽  
M. Jahedi
Keyword(s):  
Laser Pulse ◽  
Inertial Confinement Fusion ◽  
Hot Spot ◽  
Deuteron Beam ◽  
Energy Gain ◽  
Nanosecond Laser Pulse ◽  
Nanosecond Laser ◽  
Inertial Confinement ◽  
Fusion Reactions ◽  
Coupled Equations

The fast ignition (FI) mechanism, in which a pellet containing the thermonuclear fuel is first compressed by a nanosecond laser pulse, and then  irradiated by an intense "ignition" beam, initiated by a  high power picosecond laser pulse,  is one of the promising approaches to the realization of the inertial confinement fusion (ICF). If the ignition beam is composed of deuterons, an additional energy is delivered to the target, coming from fusion reactions of the beam-target type, directly initiated by particles from the ignition  beam .In this work, we choose the D+T fuel and  at first step we compute the average reactivity in terms of temperature for first time at second step we use the obtained results of step one and calculate the total deposited energy of deuteron beam inside the target fuel at available physical condition then in  third step we introduced the dynamical balance equation of D+T mixture and solve these nonlinear  differential coupled  equations versus time .In forth step we compute the power density and energy gain under physical optimum conditions and at final step we concluded that  maximum  energy deposited  in the target from D+T and D+D reaction are equal to  to19269.39061 keV and 39198.58043 keV respectively.  

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