Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.0
2.9
Journals
Coatings
Special Issues
Cold Gas Spray Coatings: Fundamentals and Applications
share announcement

Cold Gas Spray Coatings: Fundamentals and Applications

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

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 11672

Special Issue Editor

Prof. Dr. Sergi Dosta

E-Mail Website
Guest Editor
Thermal Spray Center (CPT), Department of Materials Sciences and Engineering, Universitat de Barcelona, Barcelona, Spain
Interests: thermal spray coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We invite researchers to submit original innovative research works to this Special Issue on "Cold Gas Spray Coatings: Fundamentals and Applications". Cold gas spray is a novel thermal spray technology based on the deposition of impinging particles at high kinetic energy, high enough to produce plastic deformation and high interfacial pressures and temperatures being, almost entirely, a solid-state process. Cold spray deposition does not require melting of the feedstock material, leading to many advantages over other conventional thermal spray technologies. With the development of the cold gas spray technique, the study of the interface phenomena and coating properties is becoming increasingly critical for both fundamental scientific research and industrial applications. The aim of this Special Issue is to highlight some of the most recent and most significant contributions to the cold spray coatings field, through a combination of original research papers and review articles from leading groups around the world.

In particular, the topics of interest include but are not limited to:

  • Influence of key parameters for cold spraying
  • Deposition mechanisms
  • Novel coatings and applications
  • Multilayer and nanostructured coatings
  • Improved mechanical or tribological properties of cold spray coatings

Prof. Dr. Sergi Dosta
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 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.

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

15 pages, 2698 KiB  
Article
Cold Spraying of Thick Biomimetic and Stoichiometric Apatite Coatings for Orthopaedic Implants
by Ambra Paterlini, Joël Alexis, Yannick Balcaen and Ghislaine Bertrand
Coatings 2022, 12(6), 722; https://doi.org/10.3390/coatings12060722 - 24 May 2022
Cited by 4 | Viewed by 2077
Abstract
Ceramic coatings have a long history in the orthopaedic field, with plasma sprayed coatings of hydroxyapatite as leading standard in the manufacturing process; however, these coatings can contain secondary phases resulting from the decomposition of hydroxyapatite at high temperatures, which limit the lifetime [...] Read more.
Ceramic coatings have a long history in the orthopaedic field, with plasma sprayed coatings of hydroxyapatite as leading standard in the manufacturing process; however, these coatings can contain secondary phases resulting from the decomposition of hydroxyapatite at high temperatures, which limit the lifetime of implants and their osseointegration. This work aims to produce coatings that can maximize bone osseointegration of metallic implants. In order to preserve the raw characteristics of hydroxyapatite powders that are thermally unstable, coatings were deposited by cold spray onto Ti6Al4V alloy substrates. In contrast with other thermal spray technologies, this process presents the advantage of spraying particles through a supersonic gas jet at a low temperature. On top of hydroxyapatite, carbonated nanocrystalline apatite was synthesized and sprayed. This biomimetic apatite is similar to bone minerals due to the presence of carbonates and its poor crystallinity. FTIR and XRD analyses proved that the biomimetic characteristics and the non-stoichiometric of the apatite were preserved in the cold spray coatings. The cold spray process did not affect the chemistry of the raw material. The adhesion of the coatings as well as their thicknesses were evaluated, showing values comparable to conventional process. Cold spraying appears as a promising method to preserve the characteristics of calcium phosphate ceramics and to produce coatings that offer potentially improved osseointegration. Full article
(This article belongs to the Special Issue Cold Gas Spray Coatings: Fundamentals and Applications)
►▼ Show Figures

Figure 1

16 pages, 9194 KiB  
Article
Deposition Behavior and Microstructure of Cold-Sprayed Ni-Coated Al Particles
by Xiao Chen, Hongkai Zhou, Zhimin Pi and Zhiwu Huang
Coatings 2022, 12(4), 544; https://doi.org/10.3390/coatings12040544 - 18 Apr 2022
Viewed by 1594
Abstract
Cold spraying is a novel technology for preparing solid-state coatings. Single Ni-coated Al particles were deposited onto different substrates by cold spraying at different accelerating gas temperatures, as well as preparing for the coatings. The influence of the accelerating gas temperature and substrate [...] Read more.
Cold spraying is a novel technology for preparing solid-state coatings. Single Ni-coated Al particles were deposited onto different substrates by cold spraying at different accelerating gas temperatures, as well as preparing for the coatings. The influence of the accelerating gas temperature and substrate microhardness on the particle deposition deformation, microstructure, and microhardness of Ni-coated Al coatings were investigated. The results show that the embedding depth of Ni-coated Al particles into the Al substrate increased with increasing the accelerating gas temperature. However, the cold-sprayed Ni-coated Al particles did not embed into the Q235 steel substrate, and the degree of plastic deformation of the Ni-coated Al particles increased with increasing the accelerating gas temperature. Moreover, the morphology of the Ni-coated Al splat deposited onto the Q235 steel substrate at an accelerating gas temperature of 400 °C presented a flattened morphology, which was different from the nearly spherical or ellipsoidal morphology of the Ni-coated Al feedstock. Ni-coated Al coatings exhibited the same phase compositions as the feedstock powders, and the Ni and Al phases in the coatings incurred a certain plastic deformation. Compared with the Q235 steel substrate, an Al substrate with a lower microhardness is beneficial for forming the first layer coating, as well as for the formation of an intermixing structure between the Ni-coated Al coating and Al substrate. The porosity of Ni-coated Al coatings decreased and the thickness increased when increasing the gas temperature; in particular, the coating deposited onto Al substrate had the lowest porosity and the largest thickness at an accelerating gas temperature of 400 °C. Meanwhile, the microhardness of the coating deposited onto the Al substrate was higher than that deposited onto the Q235 steel substrate under the same cold spraying conditions. Full article
(This article belongs to the Special Issue Cold Gas Spray Coatings: Fundamentals and Applications)
►▼ Show Figures

Figure 1

11 pages, 4356 KiB  
Article
Particle Compression Test: A Key Step towards Tailoring of Feedstock Powder for Cold Spraying
by Hamid Assadi and Frank Gärtner
Coatings 2020, 10(5), 458; https://doi.org/10.3390/coatings10050458 - 9 May 2020
Cited by 20 | Viewed by 3816
Abstract
Cold spray is on the way to becoming a mainstream technology for coating and additive manufacturing processes. While there have been many advances in various aspects of this technology, the question of tailoring the ‘ideal’ feedstock powder for cold spraying has remained open. [...] Read more.
Cold spray is on the way to becoming a mainstream technology for coating and additive manufacturing processes. While there have been many advances in various aspects of this technology, the question of tailoring the ‘ideal’ feedstock powder for cold spraying has remained open. In particular, the mechanical strength and its dependence on the particle size, which are amongst the most relevant properties of the feedstock powder for cold spraying, are rarely covered when reporting powder specifications. This is mainly because of the lack of standardised methods of characterisation for these specific properties. In the present case study, we demonstrate how compression tests of single Inconel 718 particles by using a modified nanoindenter can address this central question. Data analyses are supported by finite element modelling of particle compression for a range of plastic behaviours. The results of simulation are then stored in the form of a surrogate model for subsequent comparison with the experimental data. Thus, the ultimate tensile strength and the size of the examined particles are calculated directly from the measured force-displacement data. The paper will also discuss how this information can be used to optimise cold spraying, and so, unveils a key step towards the design and manufacturing of cold-spray-specific feedstock powder. Full article
(This article belongs to the Special Issue Cold Gas Spray Coatings: Fundamentals and Applications)
►▼ Show Figures

Figure 1

17 pages, 4764 KiB  
Article
Modeling of Erosion Response of Cold-Sprayed In718-Ni Composite Coating Using Full Factorial Design
by Elisa Verna, Roberto Biagi, Marios Kazasidis, Maurizio Galetto, Edoardo Bemporad and Rocco Lupoi
Coatings 2020, 10(4), 335; https://doi.org/10.3390/coatings10040335 - 1 Apr 2020
Cited by 17 | Viewed by 3074
Abstract
In this work, the cold-spray technique was used to deposit Inconel 718–nickel (1:1) composite coatings on stainless steel substrate. A general full factorial design was adopted to identify the statistically significant operating variables, i.e., impingement angle, erodent size, and feed rate on the [...] Read more.
In this work, the cold-spray technique was used to deposit Inconel 718–nickel (1:1) composite coatings on stainless steel substrate. A general full factorial design was adopted to identify the statistically significant operating variables, i.e., impingement angle, erodent size, and feed rate on the coating erosion response. Erodent feed rate, impingement angle, and the interaction between impingement angle and erodent size were identified as the highly significant variables on the erosion rate. Then, a model correlating the identified variables with the erosion rate was derived. The best combination of control variables for minimum erosion loss with respect to erodent feed rate, erodent size, and impingement angle was 2 mg/min, 60 μm, and 90°, respectively. To analyze the erosion mechanism, the erodent samples were finally observed using Scanning Electron Microscope (SEM). Full article
(This article belongs to the Special Issue Cold Gas Spray Coatings: Fundamentals and Applications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop