Mathematical model for control over the plasma spray-deposition process

1985 ◽  
Vol 24 (11) ◽  
pp. 829-832
Author(s):  
V. M. Zurabov ◽  
A. F. Puzryakov
Keyword(s):  
Mathematical Model ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Deposition Process

Use of dimensionless complex parameters for the investigation of the plasma spray-deposition process

1979 ◽  
Vol 18 (6) ◽  
pp. 382-386
Author(s):  
V. S. Loskutov ◽  
G. P. Lazarenko
Keyword(s):  
Plasma Spray ◽  
Spray Deposition ◽  
Deposition Process ◽  
Dimensionless Complex

Mathematical Model of In-Flight Oxidation of Metallic Particles in Thermal Spraying

2000 ◽  
Author(s):  
A.M. Ahmed ◽  
R.H. Rangel ◽  
V.V. Sobolev ◽  
J.M. Guilemany
Keyword(s):  
Mathematical Model ◽  
Thermal Behavior ◽  
Spray Deposition ◽  
Particle Surface ◽  
Thermal Spraying ◽  
Deposition Process ◽  
Conservation Equation ◽  
Spherical Particles ◽  
Energy Conservation Equation ◽  
Acceleration And Deceleration

Abstract This paper presents a mathematical model of the in-flight oxidation of spherical particles during thermal spray deposition process. The model includes analysis of the mechanical and thermal behavior of the powder particles. The former accounts for acceleration and deceleration of the particles at the spray distance under different fluid velocities. The thermal behavior takes into account heating, melting, cooling and possible solidification as the particle travel towards the substrate. A finite-difference method is used to solve the thermal energy conservation equation of the particles. The model includes nonequilibrium calculations of the phase change phenomena in the liquid-solid (mushy) zone. The growth of the oxide layer at the particle surface is represented by a modified boundary condition, which includes finite-rate oxidation. The results obtained give the interrelations between various process parameters and the oxidation phenomenon and agree with experimental observation.

On the Implementation of Neural Network Concept to Optimize Thermal Spray Deposition Process

2001 ◽  
Vol 700 ◽  
Author(s):  
Sofiane Guessasma ◽  
Ghislain Montavon ◽  
Christian Coddet
Keyword(s):  
Plasma Spray ◽  
Numerical Models ◽  
Spray Deposition ◽  
Deposition Process ◽  
Processing Parameters ◽  
Point Of View ◽  
Formation Mechanisms ◽  
Spray Process ◽  
Network Concept ◽  
Coating Formation

AbstractNumerous processing parameters, up to fifty, characterize the plasma spray deposition process. A better quality control of the resulting deposits induces a better understanding of their effects on coating formation mechanisms. Numerical models can help to provide such an understanding. From a mathematical point of view, d.c. plasma spray deposition process is assimilated to a nonlinear problem in regards to its variables (operating parameters, environment, etc.). This paper develops a global approach based on an implicit describing of the mechanisms implementing Artificial Neural Networks (ANNs). The global concept and the protocols to implement are presented and developed for an example related to d.c. plasma spray process.

A mathematical model of the spray deposition process

1989 ◽  
Vol 20 (1) ◽  
pp. 71-85 ◽  
Author(s):  
E. Gutierrez-Miravete ◽  
E. J. Lavernia ◽  
G. M. Trapaga ◽  
J. Szekely ◽  
N. J. Grant
Keyword(s):  
Mathematical Model ◽  
Spray Deposition ◽  
Deposition Process

Plasma Spray Deposition of Hydroxyapatite Coatings from Sol Precursors

2007 ◽  
Vol 539-543 ◽  
pp. 1128-1133 ◽  
Author(s):  
Tom W. Coyle ◽  
E. Garcia ◽  
Z. Zhang ◽  
Lu Gan
Keyword(s):  
Particle Size ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Statistical Design ◽  
Deposition Process ◽  
The Body ◽  
Statistical Design Of Experiments ◽  
Deposition Parameters ◽  
Hydroxyapatite Coatings ◽  
Scanning Transmission

Plasma spray deposition of hydroxyapatite (HA) coatings is a well established commercial process. When deposited on metallic substrates, these coatings have been shown to promote bone fixation and osteconductivity. A concern with current coatings is the formation of relatively large debris particles during resorption. The size of the debris is related to the particle size of the powder injected into the plasma during the deposition process. The use of solution precursors or dispersions of fine particle size powders as the feedstock for plasma spraying has been shown to produce submicron/nanocrystalline structured coatings from relatively inexpensive precursors. Nanocrystalline HA coatings may improve the resorption of the coating in the body, avoiding the irritant effect of large particles which may be seen in current thermal sprayed HA coatings. We have explored the use of sols prepared from several different precursors as the feedstock for the plasma spray deposition of HA coatings on Ti6Al4V substrates, employing statistical design of experiments to establish optimal deposition conditions. We report on the formation and the characteristics of the coatings as a function of the deposition parameters. The presence of different Ca-P crystalline and amorphous phases was assessed by X-ray diffraction analysis. The coating microstructure was characterized by scanning/transmission electron microscopy. The suitability of the technique to coat biomedical implants is discussed.

Experimental and simulation approach to plasma spray deposition of yttrium oxide

2012 ◽  
Vol 28 (9) ◽  
pp. 646-656 ◽  
Author(s):  
T K Thiyagarajan ◽  
P V Ananthapadmanabhan ◽  
K P Sreekumar ◽  
Y Chakravarthy ◽  
A K Das ◽  
...  
Keyword(s):  
Yttrium Oxide ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Simulation Approach

Development and assessment of a mathematical model to predict foliar spray deposition under laboratory track spraying conditions

1991 ◽  
Vol 33 (3) ◽  
pp. 281-304 ◽  
Author(s):  
B. Terence Grayson ◽  
James D. Webb ◽  
Simon E. Pack ◽  
Dean Edwards
Keyword(s):  
Mathematical Model ◽  
Spray Deposition ◽  
Foliar Spray

scholarly journals Bulk CoNiFe-SiB Amorphous and Nanostructured Alloys Produced by Plasma Spray Deposition and Dynamic Compaction: Formation of Soft Magnetic Properties

2015 ◽  
Vol 75 ◽  
pp. 1238-1243 ◽  
Author(s):  
Elena Denisova ◽  
Ludmila Kuzovnikova ◽  
Rauf Iskhakov ◽  
Aleksandr Kuzovnikov ◽  
Anatoly Lepeshev ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Plasma Spray ◽  
Spray Deposition ◽  
Dynamic Compaction ◽  
Soft Magnetic Properties ◽  
Soft Magnetic ◽  
Nanostructured Alloys

A large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (74) ◽  
pp. 60562-60569 ◽  
Author(s):  
Zhurong Liang ◽  
Shaohong Zhang ◽  
Xueqing Xu ◽  
Nan Wang ◽  
Junxia Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Surface Coverage ◽  
Spray Deposition ◽  
Deposition Process ◽  
Ambient Conditions ◽  
High Quality ◽  
Dense Structure ◽  
Heterojunction Solar Cells ◽  
Planar Heterojunction Solar Cells ◽  
Planar Heterojunction

A facile spray deposition process was developed to prepare high-quality perovskite films with full surface coverage and large grain size.

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