scholarly journals Modeling the Effects of Concentration of Solid Nanoparticles in Liquid Feedstock Injection on High-Velocity Suspension Flame Spray Process

2016 ◽  
Vol 55 (9) ◽  
pp. 2556-2573 ◽  
Author(s):  
Mahrukh Mahrukh ◽  
Arvind Kumar ◽  
Sai Gu ◽  
Spyros Kamnis ◽  
Ebrahim Gozali
Keyword(s):  
High Velocity ◽  
Flame Spray ◽  
Spray Process ◽  
Liquid Feedstock

scholarly journals Numerical Analysis of Multicomponent Suspension Droplets in High-Velocity Flame Spray Process

2014 ◽  
Vol 23 (6) ◽  
pp. 940-949 ◽  
Author(s):  
Ebrahim Gozali ◽  
Mahrukh Mahrukh ◽  
Sai Gu ◽  
Spyros Kamnis
Keyword(s):  
Numerical Analysis ◽  
High Velocity ◽  
Flame Spray ◽  
Spray Process

scholarly journals Properties of Copper Coatings Sprayed by Cold Spray and High Velocity Flame Spray Process

2004 ◽  
Vol 2004.41 (0) ◽  
pp. 231-232
Author(s):  
Emi KITADE ◽  
Satomi HIRAISHI ◽  
Yu TAKENOUCHI ◽  
Kazuhiko SAKAKI ◽  
Yasuo SHIMIZU
Keyword(s):  
Cold Spray ◽  
High Velocity ◽  
Flame Spray ◽  
Spray Process ◽  
Copper Coatings

Aluminum and copper deposition through the process of thermal flame spray on polypropylene-pine wood fiber composite filaments and their applications

2021 ◽  
pp. 002199832110365
Author(s):  
Sônia MA Veroneze ◽  
Thais HS Flores-Sahagun ◽  
Ramón SC Paredes ◽  
Kestur Gundappa Satyanarayana
Keyword(s):  
Fiber Composite ◽  
Wood Fiber ◽  
Physical And Mechanical Properties ◽  
Heat Treating ◽  
Flame Spray ◽  
Pine Wood ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Copper Coatings ◽  
Study Results

This paper presents a study about polypropylene-pine wood composites, both as filaments and products, coated with aluminum (Al) or copper (Cu), obtained through flame thermal spray process after subjecting the composites to thermal treatments in the second and third step of the study. Results revealed that a previous aluminum layer was needed in order to obtain copper coatings on the composites. The physical and mechanical properties of both metal coated composite filaments were also evaluated and compared with the uncoated composite filaments with and without heat treating these. Consequently, it was observed that the nature of the coating adhesion on the substrates was mechanical, and therefore abrasion blasting of filaments or the use of a higher wood fiber content in the composite improved the Al or Cu adhesion. Also, it was observed that extruded wood fiber/PP filaments should not be cooled in water because pieces might be molded directly once the moisture affects the metal coatings adhesion onto the substrates.

THE EFFECT OF FUEL TO OXYGEN RATIOS ON THE PROPERTIES OF HIGH VELOCITY OXY-FUEL TiO2 NANO-PHOTOCATALYST COATINGS

2010 ◽  
Vol 24 (02) ◽  
pp. 247-255 ◽  
Author(s):  
MARYAMOSSADAT BOZORGTABAR ◽  
MEHDI SALEHI ◽  
MOHAMMADREZA RAHIMIPOUR ◽  
MOHAMMADREZA JAFARPOUR
Keyword(s):  
Electron Microscopy ◽  
Crystallite Size ◽  
High Velocity ◽  
X Ray Diffraction ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Transmission Electron ◽  
Hvof Thermal Spray ◽  
Coating Morphology ◽  
Oxygen Ratio

A liquid fuel high velocity oxy-fuel (HVOF) thermal spray process has been used to deposit TiO 2 photocatalytic coatings utilizing a commercially available anatase/rutile nano-powder as the feedstock. The coatings were characterized in terms of the phases present, its crystallite size and coating morphology by means of X-ray diffraction analysis, scanning electron microscopy and transmission electron microscopy, respectively. The results indicate that the sprayed TiO 2 coatings were composed of both TiO 2 phases, namely anatase and rutile with different phase content and crystallite size. A high anatase content of 80% by volume was achieved at 0.00015 fuel to oxygen ratio with nanostructure coating by grain size smaller than feedstock powder. It is found that fuel to oxygen ratio strongly influenced on temperature and velocity of particles in stream jet consequently on phase transformation of anatase to rutile and their crystallite size and by optimizing the ratio which can promote structural transformation and grain coarsening in coating.

Surface Wear Improvement of Al-Alloys by Amorphous Iron-Based Flame-Sprayed Coatings

2011 ◽  
Vol 690 ◽  
pp. 405-408 ◽  
Author(s):  
Joel Voyer
Keyword(s):  
Wear Resistance ◽  
Flame Spraying ◽  
Flame Spray ◽  
Phase Content ◽  
Coating Properties ◽  
Amorphous Iron ◽  
Spray Process ◽  
Spraying Parameters ◽  
Iron Based ◽  
Sprayed Coatings

Partially amorphous iron-based coatings were produced onto aluminium using a powder flame-spraying process with a commercially available feedstock powder (Nanosteel SHS-7170) obtained from the Nanosteel Company Inc.. Several coating properties such as the microstructure, porosity, phase content, micro-hardness, and wear resistance were evaluated in the as-sprayed condition. As shown by the results obtained, the powder flame iron-based coatings perform relatively well in term of wear resistance in comparison with similar coatings produced using other expensive thermal spray techniques. Furthermore, this study shows that all the coating properties (microstructure, porosity, phase content, hardness and wear performance) depend strongly on the flame spraying parameters used. Finally, this paper demonstrates clearly that the flame-spray process may be used to produce amorphous iron-based coatings having a good wear resistance, and that this process appears to be a suitable inexpensive alternative to plasma or HVOF processes based on the present results.

A Splats Obtaining System for Thermal Spray Deposits

2007 ◽  
Vol 561-565 ◽  
pp. 1169-1172 ◽  
Author(s):  
W.T. Hsiao ◽  
W.H. Liao ◽  
M.S. Leu ◽  
Cherng Yuh Su
Keyword(s):  
Thermal Spray ◽  
High Velocity ◽  
Glass Substrate ◽  
Single Spot ◽  
Thermal Spray Process ◽  
Spray Process ◽  
Hvof Process

The image of thermal spray splats is difficult to collect due to its high velocity of droplets. Especial in High Velocity Oxy-Fuel (HVOF) process, the process present higher velocity of flame jet correlated to other thermal spray process. The system presents at this article describes a useful splats catching method to obtaining splats during thermal spray deposited. Capabilities and advantages of using this instrument are declared at this theme. The final result presented the instrument caught the single spot of HVOF sprayed splats at sub-micro second. Splats of spot were dispersed well on the glass substrate at the obtaining system, and presented various information of droplets impact at different location on the substrate.

Novel Concept for Totally Integrated Automation (TIA) Using Siemens Bus System and WinCC Online Control

2000 ◽  
Author(s):  
T. Frederking ◽  
R. Gadow
Keyword(s):  
Process Parameters ◽  
High Speed ◽  
Data Exchange ◽  
Thermal Spraying ◽  
Software Tool ◽  
Functionally Graded ◽  
Flame Spray ◽  
Total Quality ◽  
Spray Process ◽  
Bus System

Abstract Total quality management requires definite process control as well as online diagnostics, if applied in industrial surface refinement by thermal spraying. A concept for integrated online diagnostics for the high velocity oxygen fuel (HVOF) flame spray process is presented using Siemens S7-300 programmable logic controller and PC-based Siemens WinCC (Windows Control Center) visualization software. The standard functionality of the WinCC programming environment can be extended by C-scripts. The integrated database allows to protocol the relevant process parameters periodically for total quality assurance. Also particle flux imaging software tools can be implemented to adjust online process parameters and for process diagnostic purposes. The Siemens bus system hierarchy thereby provides high speed communication skills for field bus level data exchange and for supervising system components, e.g. CCD-cameras. The interconnection between S7-300 PLC, 6-axis-robot and a novel WinCC software tool enables definite automatic changes of recipes during the coating process to generate functionally graded coatings.

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