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New Materials and New Applications for the Cold Gas Spray...
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New Materials and New Applications for the Cold Gas Spray Process

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: 25 May 2025 | Viewed by 1676

Special Issue Editors

Prof. Dr. Sergi Dosta

E-Mail Website
Guest Editor
Surfaces, Developments and Treatments (SDT), Department of Materials Sciences and Physical Chemistry, Universitat de Barcelona, Barcelona, Spain
Interests: thermal spray technologies; cold gas spray; microstructural characterization; mechanical properties; corrosion resistance
Special Issues, Collections and Topics in MDPI journals
Dr. Francesco Delloro

E-Mail Website
Guest Editor
Centre des Matériaux, Mines Paris—PSL, CNRS UMR 7633, BP 87, 91003 Evry, France
Interests: cold spray; powder characterization; powder modification; mechanical behavior; microstructural analysis; industrial applications

Special Issue Information

Dear Colleagues,

We invite you to submit your original contributions to this Special Issue “New materials and new applications for the Cold Gas Spray process”. A cold spray is a powder-based coating and additive manufacturing (AM) technology that uses a pressurized and heated gas stream to accelerate powder particles at a high speed. Upon hitting the substrate, due to large plastic deformation of particles, material deposition can be obtained. A cold spray allows one to produce dense and oxide-free deposits, presenting many advantages over other thermal spraying and AM techniques, such as high deposition rates, high adhesion strengths, and moderate thermal effects on the substrate. Cold spray technology is assessed for a large variety of materials, including pure metals, alloys, and composite (metal/ceramic) materials. It can be used to achieve new goals in various industrial sectors, and innovative depositing materials represent the core of this Special Issue. We welcome original research papers and review articles representing the state-of-the-art knowledge on the cold spraying of new materials and new applications, covering both academic and industrial aspects. The topics of interest include, but are not limited to the following:

  • The cold spraying of high-entropy alloys;
  • Advances on cold spray additive manufacturing;
  • Improved powders for cold sprays;
  • New functional materials obtained by cold spraying;
  • Hard-phase dispersed alloys;
  • Intermetallic materials.

Prof. Dr. Sergi Dosta
Dr. Francesco Delloro
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

  • high-entropy alloys
  • Intermetallics
  • fuctional materials
  • hard-phase dispersed alloys
  • cold spray additive manufacturing
  • microstructure characterization
  • mechanical properties
  • corrosion resistance

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Published Papers (2 papers)

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Research

27 pages, 13116 KiB  
Article
Numerical Examination of Particle and Substrate Oxide Layer Failure and Porosity Formation in Coatings Deposited Using Liquid Cold Spray
by Peyman Khamsepour, Ali Akbarnozari, Daniel MacDonald, Luc Pouliot, Christian Moreau and Ali Dolatabadi
Coatings 2025, 15(4), 405; https://doi.org/10.3390/coatings15040405 - 28 Mar 2025
Viewed by 287
Abstract
Cold spray (CS) uses high-velocity gas to deposit solid particles without oxidation or phase change. To make the spraying process more economical, a wider-sized cut of feedstock particles needs to be deposited. The liquid cold spray (LCS) process, which uses water as a [...] Read more.
Cold spray (CS) uses high-velocity gas to deposit solid particles without oxidation or phase change. To make the spraying process more economical, a wider-sized cut of feedstock particles needs to be deposited. The liquid cold spray (LCS) process, which uses water as a propellant, has been developed to achieve this goal. The use of water as a propellant may adversely affect particle deformation and adhesion. In this study, numerical methods are used to analyze particle and substrate oxide failure to determine the effects of wetting on particle adhesion to a substrate. The results indicate that water on the particle surface or on substrate would reduce the deformation of both. The area in which oxide layers fail and metallurgical bonding can occur would be reduced. A portion of the water may become entrapped between the particle and the substrate, adversely affecting the bonding area. Increasing particle velocity and decreasing water thickness can reduce the volume of trapped water and improve density by increasing particle deformation and decreasing pore size. Full article
(This article belongs to the Special Issue New Materials and New Applications for the Cold Gas Spray Process)
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16 pages, 8936 KiB  
Article
Evaluating the Application of Cold Spray Technology for the Deposition of Copper–Graphene Composite Coatings
by Fatemeh Zarei, Amir Ardeshiri Lordejani, Siyuan Ruan, Shuo Yin, Mario Guagliano, Rocco Lupoi and Sara Bagherifard
Coatings 2025, 15(2), 153; https://doi.org/10.3390/coatings15020153 - 31 Jan 2025
Viewed by 910
Abstract
The design and implementation of two-dimensional materials into a metal matrix have been the focus of considerable research interest for achieving enhanced properties. Nevertheless, conventional and modern manufacturing techniques often struggle to fabricate bulk 2D metal matrix composites (2DMMCs) while preserving the desired [...] Read more.
The design and implementation of two-dimensional materials into a metal matrix have been the focus of considerable research interest for achieving enhanced properties. Nevertheless, conventional and modern manufacturing techniques often struggle to fabricate bulk 2D metal matrix composites (2DMMCs) while preserving the desired distribution and preventing thermomechanical damage to the constituent phases. Cold spray technology is a solid-state manufacturing method known for maintaining the composition of the original feedstock without causing significant detrimental changes during the deposition process. This study investigates the influence of cold spray process parameters on the microstructure, porosity, and microhardness of copper composites reinforced with 1 wt.% graphene platelets. The copper–graphene composite powder was synthesized via high-energy ball milling and subsequently deposited using two distinct sets of cold spray parameters employing medium- and high-pressure systems. Scanning electron microscopy, dispersive X-ray spectroscopy, porosity measurements, microhardness testing, and Raman spectroscopy were used to comprehensively evaluate the deposits. The findings demonstrate the preservation of the 2D phase and show how cold spray parameters influence porosity, hardness, and the incorporation of graphene within the copper matrix. Full article
(This article belongs to the Special Issue New Materials and New Applications for the Cold Gas Spray Process)
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