Special Issue "Surface Treatment by Laser-Assisted Techniques"

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: 30 September 2019

Special Issue Editor

Guest Editor
Dr. Rafael Comesaña

Materials Engineering, Applied Mechanics and Construction, University of Vigo, Vigo, Spain
Website | E-Mail
Interests: laser materials processing; laser surface modification; laser cladding; laser texturing; nanoparticle production by laser ablation; biomaterials processing and characterization

Special Issue Information

Dear Colleagues,

Research about surface treatment using laser-assisted techniques has developed in the last few years, while studied surface modifications are continuously evolving, from the macroscale to the nanoscale. The scope of this Special Issue of Coatings on “Surface Treatment by Laser-Assisted Techniques” includes (but is not limited to):

Laser-assisted processes at nano-, micro- and macro- scales for modification of surface properties, such as roughness, corrosion resistance, adhesion, adsorption, bonding ability, wettability, hydrophobicity, fouling, wear, friction, hardness, fracture toughness, fatigue behaviour, residual stress, conductivity, emissivity, absorption, topography, reflectivity, and other related properties. Short and ultrashort pulse laser treatments of polymers, ceramics, metals and composites for general surface applications are also of interest.

Established techniques, such as laser ablation, laser cladding, laser surface alloying, laser annealing, laser blasting, laser cleaning, laser etching, laser electroplating, laser hardening, laser structuring, laser texturing, hierarchical structuring, laser induced periodic surface structuring, interference patterning, laser micromachining, laser nitriding, pulsed laser deposition, laser thin film deposition, laser polishing, laser remelting, laser recrystallization, laser shock peening, and laser surface activation.

Laser-assisted processes for surface modification in biomaterials and medical devices, laser surface functionalization, degradability modification, bioactive coatings, biocompatibility enhancement, cell alignment, and laser surface modification of hard and soft tissues.

Mathematical modelling, theoretical analysis, thermo-mechanical models and simulation in laser surface treatments.

Submissions of original research and review articles are welcome.

Dr. Rafael Comesaña
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Laser ablation
  • Laser cladding
  • Pulsed laser deposition
  • Laser surface functionalization
  • Laser texturing
  • Biomaterial surface modification
  • Surface engineering
  • Tribology
  • Ultrashort laser pulse processing
  • Coatings

Published Papers (4 papers)

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Research

Open AccessFeature PaperArticle
Laser Surface Texturing of Alumina/Zirconia Composite Ceramics for Potential Use in Hip Joint Prosthesis
Coatings 2019, 9(6), 369; https://doi.org/10.3390/coatings9060369
Received: 18 April 2019 / Revised: 31 May 2019 / Accepted: 5 June 2019 / Published: 6 June 2019
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Abstract
The use of metal shell to fix an acetabular cup to bone in hip joint prosthesis carries some limitations, including restrictions in prosthetic femur ball diameter and in patient’s range of motion. These drawbacks could be ideally overcome by using a monolithic ceramic [...] Read more.
The use of metal shell to fix an acetabular cup to bone in hip joint prosthesis carries some limitations, including restrictions in prosthetic femur ball diameter and in patient’s range of motion. These drawbacks could be ideally overcome by using a monolithic ceramic acetabular cup, but the fixation of such an implant to host bone still remains a challenge. Since porous surfaces are known to promote more bone tissue interlocking compared to smooth materials, in this work the surfaces of sintered alumina/zirconia composite ceramics were treated by a pulsed laser radiation at 1064 nm with a pulse width in the nanosecond range, in order to impart controlled textural patterns. The influence of laser process parameters (e.g., energy per pulse, repetition rate, scanning speed, repetition number, angle of laser beam, and number of cycles) on the roughness and texture orientation was systematically investigated. The obtained surface topographies were inspected by optical and scanning electron microscopy, and the roughness was assessed by contact profilometry. Surface roughness could be modulated in the range of 3 to 30 µm by varying the processing parameters, among which the number of cycles was shown to play a major role. The laser treatment was also successfully adapted and applied to ceramic acetabular cups with a curved profile, thus demonstrating the feasibility of the proposed approach to process real prosthetic components. Full article
(This article belongs to the Special Issue Surface Treatment by Laser-Assisted Techniques)
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Open AccessArticle
Experiment Study of Rapid Laser Polishing of Freeform Steel Surface by Dual-Beam
Coatings 2019, 9(5), 324; https://doi.org/10.3390/coatings9050324
Received: 28 April 2019 / Revised: 11 May 2019 / Accepted: 13 May 2019 / Published: 16 May 2019
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Abstract
One of the challenges regarding widespread use of parts made from alloy steel is their time-consuming polishing process. A rough freeform surface of part has been often expected to be polished rapidly up to a smooth surface finish. The focus of this study [...] Read more.
One of the challenges regarding widespread use of parts made from alloy steel is their time-consuming polishing process. A rough freeform surface of part has been often expected to be polished rapidly up to a smooth surface finish. The focus of this study is to develop a fast polishing method of freeform surface by using dual-beam lasers. The dual-beam laser system consists of continuous laser (CW) and pulsed laser based on a five-axis CNC device. In this study, a series of experiments of CW laser polishing present the effects of different spot irradiation on surface topography, then the combination trajectory of zigzag and square waveform of pulsed laser is explored to realize a “melting peak for filling into valley” (MPFV) method. The polishing experiment on a semisphere of S136H steel polished by dual-beam shows that a rough semisphere surface was rapidly polished from initial state value of Sa (=877 nm) to post-polished value of Sa (=142 nm), and the polishing efficiency is as high as 2890 cm2/H. Full article
(This article belongs to the Special Issue Surface Treatment by Laser-Assisted Techniques)
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Open AccessArticle
Laser Surface Blasting of Granite Stones Using a Laser Scanning System
Coatings 2019, 9(2), 131; https://doi.org/10.3390/coatings9020131
Received: 3 December 2018 / Revised: 28 January 2019 / Accepted: 18 February 2019 / Published: 19 February 2019
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Abstract
Granite stones are the most abundant rock of the crust. Due to their beauty, durability, and virtually zero maintenance, they have been used widely since ancient times in all types of construction, as a structural or decorative element. Commonly, this material is used [...] Read more.
Granite stones are the most abundant rock of the crust. Due to their beauty, durability, and virtually zero maintenance, they have been used widely since ancient times in all types of construction, as a structural or decorative element. Commonly, this material is used with a polished finishing, but there has been an increased interest in giving it a rustic aspect, mainly for decorative or functional reasons, e.g., to reduce slipping. Rough surfaces are usually produced by means of bush hammering, but this is an extremely noisy and inefficient process. In this work we have explored the capabilities and limits of a laser blasting process assisted by a scanning system in order to produce precise and controllable roughness on two varieties of granite plates. It was found that laser blasting of thin granite tiles can be accomplished with processing widths up to 250 mm at medium-low laser power, obtaining a rustic aspect suitable for use in façades, paving, or flooring. Moreover, laser scanner systems are capable of enhancing the productivity of this process up to ten times greater than that found in previous works. Full article
(This article belongs to the Special Issue Surface Treatment by Laser-Assisted Techniques)
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Open AccessArticle
Characteristics of Pd and Pt Nanoparticles Produced by Nanosecond Laser Irradiations of Thin Films Deposited on Topographically-Structured Transparent Conductive Oxides
Received: 10 November 2018 / Revised: 7 January 2019 / Accepted: 22 January 2019 / Published: 24 January 2019
Cited by 1 | PDF Full-text (7888 KB) | HTML Full-text | XML Full-text
Abstract
Pd and Pt nanoparticles on Fluorine-doped tin oxide (FTO) are produced. This outcome is reached by processing nanoscale-thick Pd and Pt films deposited on the FTO surface by nanosecond laser pulse. Such laser processes are demonstrated to initiate a dewetting phenomenon in the [...] Read more.
Pd and Pt nanoparticles on Fluorine-doped tin oxide (FTO) are produced. This outcome is reached by processing nanoscale-thick Pd and Pt films deposited on the FTO surface by nanosecond laser pulse. Such laser processes are demonstrated to initiate a dewetting phenomenon in the deposited metal films and lead to the formation of the nanoparticles. In particular, the effect of the film’s thickness on the mean size of the nanoparticles, when fixed the laser fluence, is studied. Our results indicate that the substrate topography influences the dewetting process of the metal films and, as a consequence, impacts on the nanoparticle characteristics. The results concerning the Pd and Pt nanoparticles’ sizes versus starting films thickness and substrate topography are discussed. In particular, the presented discussion is based on the elucidation of the effect of the substrate topography effect on the dewetting process through the excess of chemical potential. Finally, Raman analysis on the fabricated samples are presented. They show, in particular for the case of the Pd nanoparticles on FTO, a pronounced Raman signal enhancement imputable to plasmonic effects. Full article
(This article belongs to the Special Issue Surface Treatment by Laser-Assisted Techniques)
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