Taguchi Experiment on Strength Correlation Between a Customer and Supplier of Porous Coatings

2009 ◽  
pp. 96-96-13
Author(s):  
RR Peterson
Keyword(s):  
Porous Coatings

Mechanism of stabilization of porous coatings on unstable supersonic mode in hypersonic boundary layers

2021 ◽  
Vol 33 (5) ◽  
pp. 054105
Author(s):  
Tiehan Long ◽  
Ying Dong ◽  
Rui Zhao ◽  
Chihyung Wen
Keyword(s):  
Boundary Layers ◽  
Porous Coatings ◽  
Hypersonic Boundary Layers

Stable Superhydrophobic Porous Coatings from Hybrid ABC Triblock Copolymers and Their Anticorrosive Performance

2017 ◽  
Vol 9 (35) ◽  
pp. 30056-30063 ◽  
Author(s):  
Xin Zhou ◽  
Junhua Kong ◽  
Jiaotong Sun ◽  
Hui Li ◽  
Chaobin He
Keyword(s):  
Triblock Copolymers ◽  
Porous Coatings ◽  
Abc Triblock Copolymers

scholarly journals SEM and EDS Characterization of Porous Coatings Obtained On Titaniumby Plasma Electrolytic Oxidation in Electrolyte Containing Concentrated Phosphoric Acid with Zinc Nitrate

2017 ◽  
Vol 17 (2) ◽  
pp. 41-54 ◽  
Author(s):  
K. Rokosz ◽  
T. Hryniewicz ◽  
K. Pietrzak ◽  
W. Malorny
Keyword(s):  
Phosphoric Acid ◽  
Plasma Electrolytic Oxidation ◽  
Pure Titanium ◽  
Zinc Nitrate ◽  
Porous Coatings ◽  
Electrolytic Oxidation ◽  
Micro Arc Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

AbstractThe SEM and EDS results of porous coatings formed on pure titanium by Plasma Electrolytic Oxidation (Micro Arc Oxidation) under DC regime of voltage in the electrolytes containing of 500 g zinc nitrate Zn(NO3)2·6H2O in 1000 mL of concentrated phosphoric acid H3PO4at three voltages, i.e. 450 V, 550 V, 650 V for 3 minutes, are presented. The PEO coatings with pores, which have different shapes and the diameters, consist mainly of phosphorus, titanium and zinc. The maximum of zinc-to-phosphorus (Zn/P) ratio was found for treatment at 650 V and it equals 0.43 (wt%) | 0.20 (at%), while the minimum of that coefficient was recorded for the voltage of 450 V and equaling 0.26 (wt%) | 0.12 (at%). Performed studies have shown a possible way to form the porous coatings enriched with zinc by Plasma Electrolytic Oxidation in electrolyte containing concentrated phosphoric acid H3PO4with zinc nitrate Zn(NO3)2·6H2O.

Numerical study on reducing aerodynamic drag and noise of circular cylinders with non-uniform porous coatings

2020 ◽  
Vol 107 ◽  
pp. 106308
Author(s):  
Pikai Zhang ◽  
Yu Liu ◽  
Zhiyong Li ◽  
Hanru Liu ◽  
Yannian Yang
Keyword(s):  
Aerodynamic Drag ◽  
Numerical Study ◽  
Circular Cylinders ◽  
Porous Coatings

Micro-Porous Coatings and Enhanced CHF for Downward Facing Boiling During Passive Emergency Reactor Cooling

2016 ◽  
Author(s):  
Albert E. Segall ◽  
Faruk A. Sohag ◽  
Faith R. Beck ◽  
Lokanath Mohanta ◽  
Fan-Bill Cheung ◽  
...  
Keyword(s):  
Cold Spray ◽  
Heat Removal ◽  
Porous Coating ◽  
Porous Coatings ◽  
Spray Coatings ◽  
Spray Process ◽  
External Cooling ◽  
Loss Of Coolant Accident ◽  
Lower Head ◽  
Viable Approach

During a Reaction Initiated Accident (RIA) or Loss of Coolant Accident (LOCA), passive external-cooling of the reactor lower head is a viable approach for the in-vessel retention of Corium; while this concept can certainly be applied to new constructions, it may also be viable for operational systems with existing cavities below the reactor. However, a boiling crisis will inevitably develop on the reactor lower head owing to the occurrence of Critical Heat Flux or CHF that could reduce the decay heat removal capability as the vapor phase impedes continuous boiling. Fortunately, this effect can be minimized for both new and existing reactors through the use of a Cold-Spray delivered, micro-porous coating that facilitates the formation of vapor micro-jets from the reactor surface. The micro-porous coatings were created by first spraying a binary mixture with the sacrificial material then removed via etching. Subsequent quenching experiments on uncoated and coated hemispherical surfaces showed that local CHF values for the coated vessel were consistently higher relative to the bare surface. Moreover, it was observed for both coated and uncoated surfaces that the local rate of boiling and local CHF limit varied appreciably along the outer surface. Nevertheless, the results of this intriguing study clearly show that the use of Cold Spray coatings could enhance the local CHF limit for downward facing boiling by more than 88%. Moreover, the Cold-Spray process is amenable to coating the lower heads of operating reactors.

The influence of three-dimensional capillary-porous coatings on heat transfer at liquid boiling

2016 ◽  
Vol 42 (4) ◽  
pp. 391-394 ◽  
Author(s):  
A. S. Surtaev ◽  
A. N. Pavlenko ◽  
V. I. Kalita ◽  
D. V. Kuznetsov ◽  
D. I. Komlev ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Porous Coatings
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