The Benefits of the PROTAL Process on the Adhesion of Thermal Sprayed Coating

2000 ◽  
Author(s):  
G. Barbezat ◽  
F. Folio ◽  
C. Coddet ◽  
G. Montavon
Keyword(s):  
Thermal Spray ◽  
Nd:Yag Laser ◽  
Tensile Testing ◽  
Surface Preparation ◽  
Single Step ◽  
Indentation Method ◽  
Pulsed Nd:Yag Laser ◽  
Metallurgical Bonding ◽  
New Process ◽  
Sprayed Coating

Abstract In this paper, the authors evaluate the effect of different laser parameters on the adhesion of coatings produced by the Protal method. The process incorporates an atmospheric thermal spray torch and a pulsed Nd:YAG laser, achieving surface preparation (comparable to grit blasting) and coating deposition in a single step. Coating adhesion was measured via tensile testing and an indentation method, and the rupture areas (along with some of the coating-substrate interfaces) were examined using SEM techniques. The results show that with the new process chemical and metallurgical bonding can be achieved between the substrate and coating by spraying in air.

Surface Preparation and Thermal Spray in a Single Step: The Protal Process

1998 ◽  
Author(s):  
C. Coddet ◽  
G. Montavon ◽  
T. Marchione ◽  
O. Freneaux
Keyword(s):  
Laser Irradiation ◽  
Thermal Spray ◽  
Surface State ◽  
Surface Preparation ◽  
Surface Characteristics ◽  
Industrial Applications ◽  
Single Step ◽  
Porosity Level ◽  
Sand Blasting ◽  
Deposit Characteristics

Abstract Thermal spray techniques can fulfill numerous industrial applications. Coatings are hence applied to resist against wear, corrosion, or to modify the surface characteristics of the substrate (e.g., conductivity, etc.). However, many of these applications remain inhibited by some deposit characteristics, such as a limited coating adhesion or pores, or by industrial costs since several non-synchronized steps (i.e., degreasing, sand-blasting and spraying) are needed to manufacture a deposit. The PROTAL® process was designed to reduce the aforementioned difficulties by implementing simultaneously a Q-switched laser and a thermal spray torch. The laser irradiation is aimed to eliminate the contamination films and oxide layers, to generate a surface state enhancing the deposit adhesion and to limit the contamination of the deposited layers by condensed vapors. From PROTAL® arises the possibility to reduce, indeed suppress, the preliminary steps of degreasing and sang-blasting. In addition, in some cases, a significant increase in the deposit adhesion versus standard preparation, a decrease of the porosity level and the increase of the deposit cohesion represent important additional effects of the process.

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

Hot cracking in autogenous welding of 6061-T6 aluminum alloy by rectangular pulsed Nd:YAG laser beam

2020 ◽  
Vol 64 (6) ◽  
pp. 1077-1088
Author(s):  
Hossain Ebrahimzadeh ◽  
Hassan Farhangi ◽  
Seyed Ali Asghar Akbari Mousavi
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Nd:Yag Laser ◽  
Hot Cracking ◽  
Pulsed Nd:Yag Laser

NiTi wires welding using a 500 W pulsed Nd:YAG laser equipment

2021 ◽  
Author(s):  
Dragos-Dumitru Vâlsan ◽  
Vlad Bolocan ◽  
Andrei Novac ◽  
Gheorghe Chilinicean
Keyword(s):  
Nd:Yag Laser ◽  
Pulsed Nd:Yag Laser ◽  
Laser Equipment ◽  
Niti Wires

Preventive Effect of Tooth Fracture by Pulsed Nd:YAG Laser Irradiation with Diamine Silver Fluoride Solution

2001 ◽  
Vol 19 (6) ◽  
pp. 315-318 ◽  
Author(s):  
Keiko Yokoyama ◽  
Yuichi Kimura ◽  
Koukichi Matsumoto ◽  
Akihiro Fujishima ◽  
Takashi Miyazaki
Keyword(s):  
Laser Irradiation ◽  
Nd:Yag Laser ◽  
Preventive Effect ◽  
Fluoride Solution ◽  
Pulsed Nd:Yag Laser ◽  
Tooth Fracture ◽  
Silver Fluoride
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