Mechanical Properties and Tribological Behavior of Alloy/Coatings, 2nd Edition

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

Deadline for manuscript submissions: 31 March 2025 | Viewed by 1535

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Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
Interests: high-entropy alloy; tribological behavior; mechanical behavior
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Special Issue Information

Dear Colleagues,

The development of novel alloys and coatings that facilitate friction reduction and wear control between interacting surfaces in relative motion, whether lubricated or unlubricated, is critical in enhancing the efficiency and longevity of mechanical systems. A thorough understanding of the mechanical properties of these novel alloys and coatings is essential in predicting their operational load range and potential elastic/plastic deformation during service. Additionally, insights into the physical and chemical surface interactions that occur between contacting pairs can drive advancements in materials and surface finishes, ultimately reducing energy consumption in technical equipment.

In this context, we are pleased to announce a new Special Issue of Coatings dedicated to collecting original research articles focused on tribological studies and mechanical properties in novel alloys and coatings. Submissions should explore these properties on the macro-, micro-, and nanoscale, encompassing a variety of structures, such as monolayers, multilayers, functionally graded architectures, and bioinspired hierarchical designs using metals, nitrides, and ceramics.

We invite researchers and experts to contribute their findings to this Special Issue, with the aim of advancing our knowledge and application of cutting-edge materials in tribology and mechanical engineering.

We look forward to receiving your contributions.

Dr. Saideep Muskeri
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.

Keywords

  • bioinspired hierarchical structures
  • graded architecture
  • multilayers
  • tribology
  • friction and wear

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Published Papers (1 paper)

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Research

22 pages, 6457 KiB  
Article
Mechanical and Tribological Properties of the CrAl/CrAlN and CrAl/CrAlN-(a-CNx) Multilayers Deposited by HIPIMS
by Cecilio J. Martínez-González, Max F. Flores-Jiménez, David I. Bravo-Barcenas, Omar Jiménez-Alemán and Martín Flores-Martínez
Coatings 2023, 13(8), 1344; https://doi.org/10.3390/coatings13081344 - 31 Jul 2023
Viewed by 1441
Abstract
In this study, two CrAl/CrAlN multilayer coatings of 1.5 µm and 1.2 µm thicknesses were deposited from a (50:50) CrAl sectioned target by high-power impulse magnetron sputtering (HIPIMS) onto A11 tool steel to evaluate the effect over mechanical and tribological properties by the [...] Read more.
In this study, two CrAl/CrAlN multilayer coatings of 1.5 µm and 1.2 µm thicknesses were deposited from a (50:50) CrAl sectioned target by high-power impulse magnetron sputtering (HIPIMS) onto A11 tool steel to evaluate the effect over mechanical and tribological properties by the addition of an (a-CNx) top layer. XRD analysis showed a CrAlN FCC structure (111) and a Cr phase (110). A glass-like morphology was observed in the CrAl layer and in the (a-CNx) top layer, while the CrAlN layers exhibited a columnar morphology according to the FE-SEM analysis. Raman analysis results confirmed characteristic peaks G and D for the carbon amorphous structure of the (a-CNx) top layer. Nanoindentation results showed comparable hardnesses (23.08 GPa ± 2.8 and 20.58 GPa ± 1.8) in both multilayer coatings. The CrAl/CrAlN multilayer with an (a-CNx) top layer increased the absorption energy capacity and the mechanical potential energy stored. The nano scratch test showed the strongest crack resistance and highest adhesive energy values for the CrAl/CrAlN multilayer. The addition of an (a-CNx) top layer improved the tribological behavior when higher normal loads were applied during the fretting test. Raman analysis showed an increase in the I(D)/I(G) ratio and a formation of a carbon sp2 structure (i.e., graphite-like structure) over the worn surfaces, as well as dissipated energy (J/m) during the fretting test. Full article
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