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Lubricants
Special Issues
Wear and Friction of High-Performance Coatings and Hardened Surfaces
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Wear and Friction of High-Performance Coatings and Hardened Surfaces

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: 15 September 2025 | Viewed by 2244

Special Issue Editors

Dr. Quanshun Luo

E-Mail Website
Guest Editor
Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK
Interests: wear and friction properties; wear mechanisms; transmission electron microscopy; residual stress measurement; PVD hard coatings; solid lubricant coatings; plasma nitriding; wear resistant steels; failure investigation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Qimin Wang

E-Mail Website
Guest Editor
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: nanocomposite coatings; hybrid PVD techniques; coatings for cutting tools; tribology in metal machining; surface engineering technology; high-temperature protective coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Wear is a major engineering material failure, while friction is known to contribute to the severity of wear and reduce the efficiency of machinery. Research and advances in this field have been significant in recent decades. In this Special Issue, we welcome the contribution of original research papers, topic reviews and industrial case studies that reflect the latest scientific and technological advances in wear-resistant coatings and hardened surfaces.

  • The coatings are materials developed via physical and chemical vapour deposition, spraying and cladding processes, including, but not limited to, transition metal nitrides and carbides, diamond-like carbon (DLC) and other carbon-based coatings, metallic/ceramic multilayers and composites, multicomponent and high-entropy alloys.
  • The hardened surfaces include those engineered via thermal chemical treatments such as nitriding, energetic peening and other surface-hardening processes.
  • The wear and friction properties may include those determined by dry and lubricated machining, sliding/rolling, abrasion, erosion and fretting wear.
  • Wear and friction mechanism studies include the characterization of worn surfaces and subsurfaces, as well as wear debris, by means of electron microscopy, electron/ion spectroscopy, crystallography, 2D/3D surface topographic analyses, and micro/nano indentation, as well as the measurement of surface residual stresses.
  • The industrial case studies include failure investigations related to wear and friction, as well as the industrial application of high-performance coatings and hardened surfaces.

We appreciate your consideration and sincerely hope that you will accept our invitation to contribute to this Special Issue.

We look forward to hearing from you soon.

Dr. Quanshun Luo
Prof. Dr. Qimin Wang
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. Lubricants 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

  • wear resistance
  • friction
  • self-sdaptive lubrication
  • hard coatings
  • surface engineering
  • sliding wear
  • wear mechanisms
  • residual stresses
  • failure investigation

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

18 pages, 7681 KiB  
Article
Microstructure, Phase Components, and Tribological Properties of Al65Cu20Fe15 Quasicrystal Coatings Deposited by HVOF
by Sherzod Kurbanbekov, Tulkinzhon Gaipov, Pulat Saidakhmetov, Alibek Tazhibayev, Sherzod Ramankulov, Sattarbek Bekbayev, Arai Abdimutalip and Dilnoza Baltabayeva
Lubricants 2025, 13(7), 297; https://doi.org/10.3390/lubricants13070297 - 6 Jul 2025
Viewed by 333
Abstract
Quasicrystalline coatings based on Al65Cu20Fe15 are of increasing interest as potential alternatives to conventional wear-resistant materials due to their unique structural and tribological properties. This study explores the influence of air pressure during high-velocity oxy-fuel (HVOF) spraying on [...] Read more.
Quasicrystalline coatings based on Al65Cu20Fe15 are of increasing interest as potential alternatives to conventional wear-resistant materials due to their unique structural and tribological properties. This study explores the influence of air pressure during high-velocity oxy-fuel (HVOF) spraying on the phase composition, morphology, and wear behavior of Al65Cu20Fe15 coatings deposited on U8G tool steel. Coatings were applied at a fixed spraying distance of 350 mm using three air pressures (1.9, 2.1, and 2.3 bar), with constant propane (2.0 bar) and oxygen (2.1 bar) supply. X-ray diffraction analysis identified the formation of Al78Cu48Fe14 and Al0.5Fe1.5 phases, while scanning electron microscopy revealed a dense, uniform microstructure with low porosity and homogeneous element distribution across all samples. Tribological testing using the ball-on-disk method showed wear track widths ranging from 853.47 to 952.50 µm, depending on the air pressure applied. These findings demonstrate that fine-tuning the air pressure during HVOF spraying significantly influences the structural characteristics and wear resistance of the resulting quasicrystalline coatings, highlighting their promise for advanced surface engineering applications. Full article
(This article belongs to the Special Issue Wear and Friction of High-Performance Coatings and Hardened Surfaces)
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15 pages, 13434 KiB  
Article
Enhanced Friction and Wear Properties of TiN/MoS2 Composite Coating on the Surface of Plasma Nitrided Ti6Al4V Alloy
by Hongyu Li, Kai Le, Ganggang Wang, Zhenghao Ren, Yuzhen Liu, Zhenglong Yang, Liwei Zheng and Shusheng Xu
Lubricants 2025, 13(1), 37; https://doi.org/10.3390/lubricants13010037 - 16 Jan 2025
Cited by 1 | Viewed by 1243
Abstract
In this study, plasma nitriding and multi-arc ion plating techniques were employed to enhance the load-bearing capacity of the TC4 alloy. The tribological properties were characterized, and the mechanisms were discussed in detail. Subsequently, the tribological properties of the coating enhanced with MoS [...] Read more.
In this study, plasma nitriding and multi-arc ion plating techniques were employed to enhance the load-bearing capacity of the TC4 alloy. The tribological properties were characterized, and the mechanisms were discussed in detail. Subsequently, the tribological properties of the coating enhanced with MoS2 were then evaluated, and the results indicated that the plasma nitriding treatment, which exhibited optimal friction performance, resulted in the formation of a nitrided layer with a thickness of 98 μm on the surface of the TC4 alloy, thereby significantly improving its mechanical properties. Furthermore, the TiN coating samples treated with plasma nitriding demonstrated superior mechanical properties, achieving the highest hardness value (20 GPa), high load-carrying capacity (58 N) and the lowest wear rate (9.16 × 10−6 mm3·N−1·m−1). Moreover, the tribological properties of MoS2 deposited on the surface of the PN-2/TiN sample were significantly enhanced, which can be attributed to the synergistic effect of the excellent load-bearing characteristics of the plasma nitriding treatment and the wear resistance of the TiN layer. This study investigates the factors contributing to the superior tribological performance of the PN-2/TiN sample and the extended friction lifetime of the PN-2/TiN/MoS2 sample. The composite coating provides a new method to improve the anti-friction of soft metals, especially titanium alloys, and is expected to be applied in the aerospace field. Full article
(This article belongs to the Special Issue Wear and Friction of High-Performance Coatings and Hardened Surfaces)
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