Thermal Spray Deposition of A Copper Coating on Aluminium Using the Protal Process

1998 ◽  
Author(s):  
S. Ayrault-Costil ◽  
G. Montavon ◽  
C. Coddet ◽  
F. Rigollet ◽  
O. Freneaux ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Spray Deposition ◽  
Surface Preparation ◽  
Copper Coating ◽  
Machine Shop ◽  
Coating Deposition ◽  
Copper Coatings ◽  
Classical Procedure ◽  
Aluminum Base ◽  
Base Substrate

Abstract In this work, the benefits of the PROTAL® process were investigated, comparing adhesion and morphology of different APS thermal spray copper coatings onto an aluminum base substrate. The PROTAL® process operates simultaneously an atmospheric thermal spray torch and a Q-switched laser (Nd:YAG) to perform surface preparation and coating deposition in a single operation. In that case, substrates are coated rough from the machine shop, i.e. without any prior surface preparation. Results obtained in this way were compared with results obtained using a classical procedure, Le, degreasing followed by sandblasting prior to coating deposition.

Surface Preparation and Thermal Spray in a Single Step: The PROTAL Process—Example of Application for an Aluminum-Base Substrate

1999 ◽  
Vol 8 (2) ◽  
pp. 235-257 ◽  
Author(s):  
C. Coddet ◽  
G. Montavon ◽  
S. Ayrault-Costil ◽  
O. Freneaux ◽  
F. Rigolet ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Surface Preparation ◽  
Single Step ◽  
Aluminum Base ◽  
Base Substrate

A Study on Evolution of Splat Radius and Temperature in Thermal Spray Process

2018 ◽  
Author(s):  
Manpreet Dash ◽  
Sangharsh Kumar ◽  
Partha Pratim Bandyopadhyay ◽  
Anandaroop Bhattacharya
Keyword(s):  
Heat Transfer ◽  
Thermal Spray ◽  
Molten Metal ◽  
Spray Deposition ◽  
Substrate Surface ◽  
Metal Droplet ◽  
Droplet Impingement ◽  
Impact Process ◽  
The Impact ◽  
Maximum Spreading

The impact process of a molten metal droplet impinging on a solid substrate surface is encountered in several technological applications such as ink-jet printing, spray cooling, coating processes, spray deposition of metal alloys, thermal spray coatings, manufacturing processes and fabrication and in industrial applications concerning thermal spray processes. Deposition of a molten material or metal in form of a droplet on a substrate surface by propelling it towards it forms the core of the spraying process. During the impact process, the molten metal droplet spreads radially and simultaneously starts losing heat due to heat transfer to the substrate surface. The associated heat transfer influences impingement behavior. The physics of droplet impingement is not only related to the fluid dynamics, but also to the respective interfacial properties of solid and liquid. For most applications, maximum spreading diameter of the splat is considered to be an important factor for droplet impingement on solid surfaces. In the present study, we have developed a model for droplet impingement based on energy conservation principle to predict the maximum spreading radius and the radius as a function of time. Further, we have used the radius as a function of time in the heat transfer equations and to study the evolution of splat-temperature and predict the spreading factor and the spreading time and mathematically correlate them to the spraying parameters and material properties.

scholarly journals On the surface preparation of nickel superalloys before CoNiCrAlY deposition by thermal spray

2004 ◽  
Vol 184 (2-3) ◽  
pp. 156-162 ◽  
Author(s):  
U. Bardi ◽  
L. Carrafiello ◽  
R. Groppetti ◽  
F. Niccolai ◽  
G. Rizzi ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Surface Preparation ◽  
Nickel Superalloys

Development of Functionally Graded Coating by Thermal Spray Deposition

2015 ◽  
pp. 121-162
Author(s):  
Jyotsna Dutta Majumdar ◽  
Indranil Manna
Keyword(s):  
Thermal Spray ◽  
Spray Deposition ◽  
Thermal Spraying ◽  
Chemical Vapor ◽  
Solid Substrate ◽  
Functionally Graded ◽  
Functionally Graded Coating ◽  
Energy Applications ◽  
Graded Coating ◽  
Gradient Coatings

Functionally Gradient Coatings (FGCs) are emerging materials with an improved service life and have a promising future for the production of (a) tailored components for applications subjected to large thermal gradients, (b) smart coating with improved corrosion and wear resistance, (c) improved fatigue wear, and (d) improved material structures for energy applications like batteries, fuel cells, etc. FGCs may be developed by physical/chemical vapor deposition, electro/electroless deposition, thermal spray deposition technique, etc. Thermal spraying refers to the technique or a group of techniques whereby molten or semi-molten droplets of materials are sprayed onto a solid substrate to develop the coating. In this chapter, detailed overviews of the development of functionally graded coating by thermal spray deposition techniques are presented. In addition, a few research results on the development of functionally graded coating for tribological and thermal barrier applications are presented.

Characterization of Cold Sprayed Copper Coatings on Al Alloy Substrate

2015 ◽  
Vol 3 (2) ◽  
pp. 41-53
Author(s):  
Tarun Goyal ◽  
T. S. Sidhu ◽  
R. S. Walia
Keyword(s):  
Spray Deposition ◽  
Structural Characteristics ◽  
Al Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Copper Coatings ◽  
Powder Particles ◽  
Micro Analysis ◽  
Hardness Values

This study reveals the successful low pressure cold spray deposition of near-uniform, defect free and dense copper coatings approximately 700-1900 µm thick, on Al alloy for electro-technical applications. The micro structural characteristics of the deposits have been studied using the combined techniques of X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) and electron-probe micro analysis (EPMA). The coatings exhibited characteristic splat-like, layered morphologies due to the deposition of solid powder particles which appeared to have been plastically deformed on impact to the substrate. The developed coatings have a dense (in the range of 3090-5015 kg/m3)and nearly uniform microstructure, with almost uniform hardness values in the range of 120 -140 Hv, and electrical conductivity in the range of 23-30 MS/m. EDAX, XRD and EPMA results revealed that the main constituent in the coating is Cu.

Process modelling of thermal spray deposition of thermosets

1995 ◽  
Vol 11 (3) ◽  
pp. 215-222 ◽  
Author(s):  
Y. Bao ◽  
D. T. Gawne
Keyword(s):  
Thermal Spray ◽  
Spray Deposition ◽  
Process Modelling

Surface preparation by using laser cleaning in thermal spray

2008 ◽  
Vol 20 (1) ◽  
pp. 12-21 ◽  
Author(s):  
H. Li ◽  
S. Costil ◽  
H-L. Liao ◽  
C. Coddet ◽  
V. Barnier ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Surface Preparation ◽  
Laser Cleaning

Dual Regime Spray Deposition Based Laser Direct Writing of Metal Patterns on Polymer Substrates

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Semih Akin ◽  
Ted Gabor ◽  
Seunghwan Jo ◽  
Hangeun Joe ◽  
Jung-Ting Tsai ◽  
...  
Keyword(s):  
Spray Deposition ◽  
Polymer Surface ◽  
Surface Preparation ◽  
Dip Coating ◽  
Polymer Materials ◽  
Activation Process ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Polymer Substrates ◽  
Metallization Of Polymers

Abstract In recent years, the metallization of polymers has been intensely studied as it takes advantage of both plastics and metals. Laser direct writing (LDW) is one of the most widely used technologies to obtain metal patterns on polymer substrates. In LDW technology, different methods including injection-molding, drop-casting, dip coating, and spin coating are utilized for surface preparation of polymer materials prior to the laser activation process. In this study, an atomization based dual regime spray coating system is introduced as a novel method to prepare the surface of the materials for LDW of metal patterns. Copper micropatterns on the polymer surface were achieved with a minimum feature size of 30 μm, having a strong adhesion and excellent conductivity. The results show that the dual regime spray deposition system can be potentially used to obtain uniform thin film coating with relatively less material consumption on the substrates for surface preparation of laser direct metallization of polymers.

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