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Laser-Assisted Coating Techniques and Surface Modifications
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Laser-Assisted Coating Techniques and Surface Modifications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Laser Coatings".

Deadline for manuscript submissions: 10 June 2024 | Viewed by 7298

Special Issue Editors

Dr. Haiying Song

E-Mail Website
Guest Editor
Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Interests: nanostructuring fabrication by ultrafast laser; ultra-microstructural surface properties and applications; surface micorstrutures characteristics modeling and simulation; time-resolved ultrafast spectroscopy; ultrafast photonics; strong-field physics and extreme radiation
Prof. Dr. Shibing Liu

E-Mail Website
Guest Editor
Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Interests: nanostructuring fabrication by ultrafast laser; ultra-microstructural surface properties and applications; surface micorstrutures characteristics modeling and simulation; strong field physics; time-resolved ultrafast spectroscopy; ultrafast pump-probe and quantum manipulate
Prof. Dr. Xuewu Li

E-Mail Website
Guest Editor
College of Mechanical Engineering, Xi’an University of Science & Technology, Xi’an, China
Interests: behavior and regulation of coating surface interface; surface engineering; metal corrosion and protection
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Laser as a heat source or light source energy has become a “universal tool” in the advanced manufacturing industry. With the rapid development of high precision mechanical manufacturing, the high surface device performance requirements are needed in many surface application fields. Laser assisted surface technology (LAST, including coatings and modification) plays an important role in the surface engineering fields. Many studies have been carried out to develop advanced technologies and new functional materials. The protective layers and modified surface can greatly improve the performance to the device.

This Special Issue will focus on the cross combination of multi-technology, multi-mechanism, and multi-methods of LAST to improve the surface properties, including the principal scheme and technology, which cannot be solved by the single technology in the laser material processing field and other surface engineering fields, the design and optimization of the process system, as well as the physical process and interfacial microstructure transition mechanism of different laser-assisted surface technologies in improving surface properties. Additive manufacturing (AM), laser surface cladding (LSC), laser chemical vapor deposition (LCVD), laser surface alloying (LSA), laser-assisted plasma spraying (LPS), pulsed laser deposition (PLD), laser surface micro/nano structure preparation and other laser-assisted surface technologies are all of interest.

This Special Issue will serve as a forum for papers in the following concepts:

  • Theoretical, design, and process of laser-assisted protection coatings by different materials.
  • Mechanism, design and preparation of laser-assisted surface modification on different substrates.
  • The durability tests of the coatings through friction, wear, heat transfer, superhydrophobic, mechanical behavior, biocompatibility, etc.
  • The combination of laser-assisted technology and other technologies to improve the surface properties.
  • The machine learning and simulation to predict surface properties, performance, durability and reliability by the laser-assisted technology.
  • Interface relationships between mechanical, chemical and electrochemical interactions.
  • The further application in various fields, such as aviation, aerospace, biomedical science, automotive, chemical, machinery and others.

Dr. Haiying Song
Prof. Dr. Shibing Liu
Prof. Dr. Xuewu Li
Guest Editors

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 submissions that pass pre-check are 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 2600 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-assisted coating techniques
  • laser-assisted surface modifications
  • surface performance
  • performance modelling and simulation
  • reliability coatings
  • machine learning

Published Papers (7 papers)

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Editorial

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3 pages, 184 KiB  
Editorial
Metasurface Properties Obtained via Laser-Assisted Surface Technology
by Haiying Song, Liang Wang and Shibing Liu
Coatings 2023, 13(2), 251; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings13020251 - 21 Jan 2023
Viewed by 961
Abstract
Lasers as sources of heat or light energy have become a “universal tool” in the advanced manufacturing industry [...] Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)

Research

Jump to: Editorial

17 pages, 17951 KiB  
Article
Study on the Microstructure and Properties of FeCoNiCrAl High-Entropy Alloy Coating Prepared by Laser Cladding-Remelting
by Tianyi Lv, Wenkai Zou, Jiaqi He, Xiang Ju and Chuanbo Zheng
Coatings 2024, 14(1), 49; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings14010049 - 28 Dec 2023
Viewed by 818
Abstract
Laser remelting technology effectively repairs defects such as pores and cracks in the coating. To investigate the impact of laser remelting on high-entropy alloy coatings, this study used Q235 steel as the substrate and employed laser cladding technology to prepare FeCoNiCrAl high-entropy alloy [...] Read more.
Laser remelting technology effectively repairs defects such as pores and cracks in the coating. To investigate the impact of laser remelting on high-entropy alloy coatings, this study used Q235 steel as the substrate and employed laser cladding technology to prepare FeCoNiCrAl high-entropy alloy coatings, followed by laser remelting treatment. The phase composition and microstructure of the coatings were extensively characterized using equipment such as optical microscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Additionally, the wear resistance and corrosion resistance of the coatings were tested using a multifunctional material surface performance tester, an electrochemical workstation, and SVET (Scanning Vibrating Electrode Technique). The results indicate that following laser remelting treatment, the atomic proportion of Fe elements on the coating surface decreased from 33.21% to 26.03%, while the atomic proportion of Al elements increased from 12.56% to 20.31%. The phase composition of the coating underwent a marked transformation, shifting from a structure composed of FCC, A2, and B2 phases to a singular BCC structure characterized by the presence of A2 and B2 phases. Concurrently, the grain morphology on the coating surface transitioned from elongated plate-like grains to equiaxed grains. Laser remelting enhanced the wear resistance of the coating. Laser remelting had no significant impact on the corrosion resistance of the non-cracked regions of the coating. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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0 pages, 14485 KiB  
Article
Effect of Spherical WC Content on the Microstructure and Properties of SiCp Aluminium Composite Material
by Xinyi Feng, Xiao Li, Fei Wang, Zengzhi Liu and Wenping Wang
Coatings 2023, 13(11), 1935; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings13111935 - 13 Nov 2023
Viewed by 832
Abstract
In this paper, SiCp aluminium matrix composites were used as the matrix, and AlSi10Mg powder, which has a relatively similar coefficient of thermal expansion to that of the matrix, was used to prepare laser cladding Al-based coatings. The results show that the optimal [...] Read more.
In this paper, SiCp aluminium matrix composites were used as the matrix, and AlSi10Mg powder, which has a relatively similar coefficient of thermal expansion to that of the matrix, was used to prepare laser cladding Al-based coatings. The results show that the optimal process parameters are P = 4400 W, Vf = 11.3 g·min−1, and VS = 1800 mm·min−1, and, although the hardness of the coatings is lower than the hardness of the substrate, it reduces the generation of defects such as cracks and porosity. With the increase in WC reinforced phase and the hardness of the coatings, wear resistance increases, the granular cytocrysts are transformed into rod-like cytocrysts, and at the same time generate the dendritic crystals, and the undergo grain refining and generate the new phases such as Al4C3, Al4SiC4. There is no obvious defect in AlSi10Mg + 40%WC coatings, the macro morphology of the coatings is good, there is no spalling in the friction wear morphology, and the wear resistance is excellent, but there are obvious cracks and obvious spalling in the coatings of AlSi10Mg + 60%WC. Compared to the matrix hardness of 171.61 HV, the hardness of the 20%WC cladding layer increased by a factor of 1.06, while the hardness of the 40%WC cladding layer increased by a factor of 1.65 and that of the 60%WC cladding layer increased by a factor of 1.8. In terms of wear, compared to a substrate wear amount of 9.36 mg, the wear for the 20%WC cladding layer was reduced to 6.13 mg (34.5% less than the substrate), for the 40%WC cladding layer it was reduced to 4.58 mg (51.06% less than the substrate), and for the 60%WC cladding layer it was reduced to 7.35 mg (21.47% less than the substrate). The quality of the coatings decreases although the hardness is higher than that of AlSi10Mg + 40%WC. The comprehensive performance of AlSi10Mg + 40%WC coatings is optimal. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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11 pages, 5812 KiB  
Article
Flexible Finely and Directly Patternable Liquid Metal Electrodes via Selective Surface Wetting Technique
by Seong Ju Park and Chanwoo Yang
Coatings 2023, 13(11), 1922; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings13111922 - 10 Nov 2023
Viewed by 869
Abstract
Eutectic gallium–indium (EGaIn) is an ideal material for preparing flexible electrodes, but its high surface tension poses a challenge during deposition and patterning. Herein, we propose a laser-induced selective surface wetting technique (SSWT) to enable the facile and straightforward fabrication of flexible finely [...] Read more.
Eutectic gallium–indium (EGaIn) is an ideal material for preparing flexible electrodes, but its high surface tension poses a challenge during deposition and patterning. Herein, we propose a laser-induced selective surface wetting technique (SSWT) to enable the facile and straightforward fabrication of flexible finely and directly patternable EGaIn liquid metal electrodes. Our proposed technique selectively controls the wettability of EGaIn by establishing a perfluorinated self-assembled monolayer on a zinc oxide nanorod array to impart superhydrophobicity and then inducing specific sites on the hydrophilized surface by ultraviolet (UV) pulsed laser ablation, thereby enabling fine patterning (linewidth, ~50 μm). Surface analysis of the effect of laser ablation was also performed to elucidate the mechanism of SSWT. The patterned EGaIn liquid metal electrode fabricated by SSWT exhibited superior flexibility, with a resistance change (ΔR/R0) of only 18.6% compared with a Ag thin film electrode, which showed a dramatic increase in ΔR/R0 to nearly 500% after 50,000 folding cycles at a peak strain of 2.5%. The simple and easily implementable liquid metal patterning technique proposed in this study may potentially be applied in the field of wearable and stretchable electronics, which requires extreme flexibility. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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18 pages, 13323 KiB  
Article
High-Temperature Oxidation Properties of Ti-Hf-Mo-Ta-Nb-B Composite Coating Deposited on Ti60 Alloy with Laser Cladding
by Kaijin Huang and Xianchao Han
Coatings 2023, 13(9), 1646; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings13091646 - 20 Sep 2023
Cited by 1 | Viewed by 769
Abstract
In order to improve the high-temperature oxidation resistance of Ti60 alloy, a Ti-Hf-Mo-Ta-Nb-B composite coating was prepared on Ti60 alloy with Ti, Hf, Mo, Ta and Nb powder and B powder as raw materials using laser cladding. The microstructure and oxidation behavior of [...] Read more.
In order to improve the high-temperature oxidation resistance of Ti60 alloy, a Ti-Hf-Mo-Ta-Nb-B composite coating was prepared on Ti60 alloy with Ti, Hf, Mo, Ta and Nb powder and B powder as raw materials using laser cladding. The microstructure and oxidation behavior of the coating before and after oxidation at 1100 °C × 120 h in static air were studied with XRD, SEM, EDS and isothermal oxidation techniques. The results show that the coating was mainly composed of six phases, (Ti0.2Hf0.2Mo0.2Ta0.2 Nb0.2)B2, TiB, HfB2, Mo4.00 B3.40, TiHf and Hf1.86Mo0.14. The high-temperature oxidation of the coating and Ti60 alloy followed parabolic law, and the oxidation weight gain rate of the coating after 110 °C × 120 h was only 1/4.8 of that of the Ti60 alloy. The improvement of the high-temperature oxidation resistance of the coating may benefit from high-temperature oxidation resistance (Ti0.2Hf0.2 Mo0.2Ta0.2Nb0.2)B2, HfB2 and TiB boride ceramic phases. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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16 pages, 5385 KiB  
Article
Effect of High-Temperature-Assisted Ultrasonic Deep Rolling on Microstructure and Tribological Properties of Ni-WC Coatings
by Jun Zhang, Yuncai Zhao, Yang He, Cheng Meng, Xinyu Zhang and Shilei Zhang
Coatings 2023, 13(3), 499; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings13030499 - 24 Feb 2023
Viewed by 1009
Abstract
Cermet coatings are post-treated by a new surface microcrystallization technology, namely high-temperature-assisted ultrasonic deep rolling (HT + UDR). The process parameters of ultrasonic deep rolling significantly affect the microstructure and tribological properties of the Ni-WC coatings. In this paper, the samples were treated [...] Read more.
Cermet coatings are post-treated by a new surface microcrystallization technology, namely high-temperature-assisted ultrasonic deep rolling (HT + UDR). The process parameters of ultrasonic deep rolling significantly affect the microstructure and tribological properties of the Ni-WC coatings. In this paper, the samples were treated with different preloading depths (0.20 mm, 0.25 mm, and 0.30 mm), and the microstructure and properties of the coatings were characterized by SEM, EDS, X-ray stress analysis, and micro-Vickers hardness testing. An MMW-1A-type friction and wear tester was used for the dry friction and wear test at room temperature, respectively. Compared with the untreated sample, plastic rheology occurred on the surface of the coatings after HT + UDR, showing a phenomenon of “cutting peaks and filling valleys”. In the treated coatings, visible cracks were eliminated, and the inside of the coating was denser. The surface hard phase was increased as a “skeleton” and embedded with the soft phase, which played a role in strong and tough bonding. After HT + UDR + 0.25 mm treatment, the surface roughness increased by 68%, the microhardness of the surface layer reached a maximum of 726.3 HV0.1, and the residual tensile stress changed from 165.5 MPa to −337.9 MPa, which inhibited the germination and propagation of cracks. HT + UDR improved the wear resistance of the coating in many aspects. The coating after the 0.25 mm preloading depth treatment possessed the smallest friction coefficient and the lowest wear amount, which is 0.04 and 4.5 mg, respectively. The wear form was abrasive wear, and the comprehensive tribological performance is the best. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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14 pages, 5962 KiB  
Article
Surface Mechanical Properties and Micro-Structure Evolution of 7075 Aluminum Alloy Sheet for 2-Dimension Ellipse Ultrasonic Vibration Incremental Forming: A Pretreatment for Laser Shock Peening
by Yuan Lv, Mengen Dong, Xixiang Pan, Cong Yi and Jiaqi Su
Coatings 2022, 12(12), 1914; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings12121914 - 07 Dec 2022
Cited by 1 | Viewed by 1302
Abstract
In this paper, a composite technique of ultrasonic incremental forming and laser shock peeing is proposed. The former process is mainly used for the manufacturing of complex-shaped sheet and strengthening coating that is prepared for subsequent laser treatment. The latter is applied for [...] Read more.
In this paper, a composite technique of ultrasonic incremental forming and laser shock peeing is proposed. The former process is mainly used for the manufacturing of complex-shaped sheet and strengthening coating that is prepared for subsequent laser treatment. The latter is applied for secondary surface reinforcement with ultra-high energy. This work focused on the novel ultrasonic incremental forming method and its effects on surface mechanical properties and micro-structure of a 7075 aluminum alloy. First, a kind of 2-dimension ellipse ultrasonic vibration incremental forming process and the unique double-mechanism method of sectionalized cooperative control of plastic deformation and mechanical performance were designed. Second, the single-point incremental forming, the longitudinal ultrasonic vibration incremental forming, and the 2 dimension ellipse ultrasonic vibration incremental forming were performed for the manufacture of conical components of 7075 aluminum alloy. Third, the Vickers micro-hardness testing results and images of the fracture morphology of the machined part for the novel technique confirm that softening mechanisms become dominant inside the metal sheet. Furthermore, a strengthening coating with excellent mechanical properties and a residual compressive stress field were created on its surface simultaneously. In a word, the research shows potential values of the proposed technique for the manufacture of aircraft panels of complex shape and excellent surface properties. Full article
(This article belongs to the Special Issue Laser-Assisted Coating Techniques and Surface Modifications)
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