Transmission welding of carbon nanocomposites with direct-diode and Nd:YAG solid state lasers

Dosser, Larry R.; Hix, Ken; Hartke, Kevin; Vaia, Richard A.; Li, Mingwei

doi:10.1117/12.528380

Cited by 18 publications

(13 citation statements)

References 3 publications

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“…In order to eliminate this problem, Tan et al propose to preheat the bed powder at 140 • C and use a laser power ranging from 16 to 21 W (Tan et al, 2003). Unfortunately, none of these authors are presenting the laser wavelength used in PEEK sintering process and in this case is very difficult to compare the results since the PEEK has different absorption coefficients for different laser wavelength (Dosser et al, 2004). Despite the good results obtained by the different authors, these studies offer a good overview only for the weldability of two polymers with different laser wavelengths, while our study is interested by the laser densification possibilities of flame sprayed polymer coatings on metallic.…”

Section: Introductionmentioning

confidence: 94%

“…The PEEK is semi-transparent at all infrared laser wavelengths (Dosser et al, 2004). In this case, a part of laser power is absorbed by the coating and the other part is transmitted through it.…”

Section: Laser Treatmentsmentioning

confidence: 99%

“…Comparing the infrared absorbing characteristics of the PEEK and carbon nanocomposites at 810 and 1064 nm, Dosser et al (2004) has been study the transmission weld of carbon nanocomposite materials. The results show that the carbon nanocomposites can be welded in a similar way to carbon black filled materials and the first one exhibited higher peel strengths at lower average laser power at both 810 and 1064 nm.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of flame spraying PEEK coating characteristics using lasers

Soveja

Sallamand

Liao

et al. 2011

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 94%

Section: Laser Treatmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement of flame spraying PEEK coating characteristics using lasers

Soveja

Sallamand

Liao

et al. 2011

Journal of Materials Processing Technology

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“…Polymer behavior during laser transmission welding for different laser beam wavelengths has been studied in (Ref [7][8][9], while Laurens and Wonga (Ref 10,11) have examined the influence of laser beam in the process structuring of polymers. The evolution of temperature field within the organic matter during laser-polymer interaction has been analyzed using different numerical models ( .…”

Section: Introductionmentioning

confidence: 98%

Remelting of Flame Spraying PEEK Coating Using Lasers

et al. 2009

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International audienceFlame spraying is frequently used for polyether ether ketone (PEEK) and PTFE coating deposition on metallic surfaces. However, this process has a certain number of limitations, particularly on the coating quality such as high porosity, low interfacial adherence, etc. For that reason a thermal post-processing step is often necessary. The objective of this study is to analyze the effects produced during a laser beam heat treatment on morphological structure (compactness) of PEEK coatings and their mechanical properties (adherence and tribology). The influence of the laser beam wavelength (by using a Nd:YAG, CO2 or diode lasers) on compactness of the flame sprayed PEEK coating deposited on metallic substrate (304L) was analyzed. Since the value of laser light absorption coefficient of the PEEK coating depends on the laser wavelength, an optimization of the operational parameters for each laser has been carried out in order to achieve melting but not burning of the PEEK coating. Nevertheless, whatever the laser wavelengths used, the results showed a good effect of the laser treatment: improvement of both polymer coating compactness and its adherence to the substrate

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“…The viability of lasers for this application is still unclear due to the varying absorption coefficients of polymers for different laser wavelengths. Absorption occurs if the frequency of the incident photons corresponds to the frequency associated with the transition energy of irradiated molecules ( Ref 14,149,[155][156][157][158]. Part of the absorbed energy is transformed into thermal energy, which leads to coating melting.…”

Section: Laser Posttreatments: Densification Of Peek Coating On 304l mentioning

confidence: 99%

Pre-/During-/Post-Laser Processes to Enhance the Adhesion and Mechanical Properties of Thermal-Sprayed Coatings with a Reduced Environmental Impact

et al. 2011

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Garcia -Alonso, D., Serres, N., Demian, C., Costil, S., Langlade, C., & Coddet, C. (2011). Pre-/during-/post-laser processes to enhance the adhesion and mechanical properties of thermal sprayed coatings with a reduced environmental impact. Journal of Thermal Spray Technology, 20(4), 719-735. DOI: 10.1007/s11666-011-9629-x General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Lasers have been used to improve the ultimate performance of thermal spray coatings for specific applications, but the full potential of additional laser treatments must be further explored. Laser treatments (auxiliary processes) can be applied before, during or after thermal spraying (main process), leading to a wide range of coating improvements (microstructure, adhesion, etc.). The aim of this review is to introduce the most significant laser treatments for thermal spray applications. The potential improvements for thermal spray coatings are illustrated by a selection of representative research cases. Laser pretreatments (ablation and texturing) promote coating/substrate adhesion and are suitable to prepare the surface of sensitive substrates such as aluminum, titanium, or magnesium alloys. The use of these techniques, which leads to several benefits such as surfaces free of grit-particle inclusions, directly improves the quality of coatings. Laser treatments applied simultaneously during the spraying process deeply modify the coatings microstructure. These hybrid technologies allow in situ laser melting of coatings, resu...

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Transmission welding of carbon nanocomposites with direct-diode and Nd:YAG solid state lasers

Cited by 18 publications

References 3 publications

Improvement of flame spraying PEEK coating characteristics using lasers

Improvement of flame spraying PEEK coating characteristics using lasers

Remelting of Flame Spraying PEEK Coating Using Lasers

Pre-/During-/Post-Laser Processes to Enhance the Adhesion and Mechanical Properties of Thermal-Sprayed Coatings with a Reduced Environmental Impact

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