Modeling Microstructure Formation in Yttria-Stabilized Zirconia (YSZ) Droplet with High Impact Velocity in Supersonic Plasma Spray

2020 ◽  
Vol 29 (7) ◽  
pp. 1695-1707
Author(s):  
Mingguang Shen ◽  
Ben Q. Li ◽  
Yu Bai
Keyword(s):  
Impact Velocity ◽  
Plasma Spray ◽  
High Impact ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Microstructure Formation ◽  
High Impact Velocity ◽  
Supersonic Plasma

scholarly journals Influence of Substrate Shape and Roughness on Coating Microstructure in Suspension Plasma Spray

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 746 ◽  
Author(s):  
Fernanda Caio ◽  
Christian Moreau
Keyword(s):  
Plasma Spray ◽  
Columnar Structure ◽  
Coating Material ◽  
Suspension Plasma Spray ◽  
Yttria Stabilized Zirconia ◽  
Radius Of Curvature ◽  
Stabilized Zirconia ◽  
Coating Microstructure ◽  
Influence Of Substrate ◽  
Steel Substrates

This study investigated the influence of the substrate shape and roughness on the microstructure of suspension plasma spray (SPS) coatings. For this purpose, an yttria-stabilized zirconia (YSZ) suspension was sprayed on flat and curved stainless-steel substrates by SPS. The suspension was composed of 20 wt.% YSZ particles in ethanol. After spraying, the morphology of the coatings was characterized by scanning electron microscopy (SEM). The results showed that the substrate shape influences the amount of coating material deposited and microstructural features of the coating. The amount of coating material deposited was seen to decrease as the radius of curvature decreased. Finally, the roughness was found to influence the formation of columnar structure.

scholarly journals Drone Launched Short Range Rockets

Aerospace ◽  
2020 ◽  
Vol 7 (6) ◽  
pp. 76
Author(s):  
Mikhail V. Shubov
Keyword(s):  
High Altitude ◽  
Impact Velocity ◽  
Initial Velocity ◽  
Short Range ◽  
Thermal Protection ◽  
High Impact ◽  
High Impact Velocity

A concept of drone launched short range rockets (DLSRR) is presented. A drone or an aircraft rises DLSRR to a release altitude of up to 20 km. At the release altitude, the drone or an aircraft is moving at a velocity of up to 700 m/s and a steep angle of up to 68° to the horizontal. After DLSRRs are released, their motors start firing. DLSRRs use slow burning motors to gain altitude and velocity. At the apogee of their flight, DLSRRs release projectiles which fly to the target and strike it at high impact velocity. The projectiles reach a target at ranges of up to 442 km and impact velocities up to 1.88 km/s. We show that a rocket launched at high altitude and high initial velocity does not need expensive thermal protection to survive ascent. Delivery of munitions to target by DLSRRs should be much less expensive than delivery by a conventional rocket. Even though delivery of munitions by bomber aircraft is even less expensive, a bomber needs to fly close to the target, while a DLSRR carrier releases the rockets from a distance of at least 200 km from the target. All parameters of DLSRRs, and their trajectories are calculated based on theoretical (mechanical and thermodynamical) analysis and on several MatLab programs.

High impact velocity on multi-layered composite of polyether ether ketone and aluminium

2015 ◽  
Vol 22 (8) ◽  
pp. 705-715 ◽  
Author(s):  
D. García-González ◽  
M. Rodríguez-Millán ◽  
A. Vaz-Romero ◽  
A. Arias
Keyword(s):  
Impact Velocity ◽  
Layered Composite ◽  
High Impact ◽  
Polyether Ether Ketone ◽  
High Impact Velocity ◽  
Ether Ketone

Development empirical-intelligent relationship between plasma spray parameters and coating performance of Yttria-Stabilized Zirconia

2014 ◽  
Vol 76 (5-8) ◽  
pp. 1031-1045 ◽  
Author(s):  
Amir Hossein Pakseresht ◽  
Ehsan Ghasali ◽  
Mehrdad Nejati ◽  
Kamyar Shirvanimoghaddam ◽  
Amir Hossein Javadi ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Yttria Stabilized Zirconia ◽  
Spray Parameters ◽  
Stabilized Zirconia ◽  
Coating Performance
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