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Advanced Surface Technology and Coating Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 2023

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Guest Editor
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China
Interests: spacecraft environmental engineering; surface effects and protection of space materials
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Special Issue Information

Dear Colleagues,

Advanced surface technologies and functional coatings are pivotal to enhancing the performance, durability, and sustainability of modern engineering systems across aerospace, energy, biomedical, and industrial sectors. These systems encompass atomically engineered thin films, nanoscale multilayers, and macro-structured composites designed to withstand complex mechanical, thermal, chemical, electrical, and biological stimuli. Their rapid evolution demands rigorous analysis of synthesis routes—including atomic/molecular layer deposition (ALD/MLD), plasma-enhanced PVD/CVD, sol–gel processing, electrochemical growth, and additive manufacturing—alongside validation of long-term functionality under extreme operational conditions such as space exposure, high-temperature corrosion, and tribological stress.

Advanced coatings must fulfill dual critical requirements: structural functions (high adhesion strength, fracture toughness, wear/erosion resistance, and thermal stability under quasi-static, dynamic, or impact loads) and non-structural functions (smart responsiveness, including self-healing, environmental sustainability, biocompatibility, and barriers against atomic oxygen, UV radiation, or corrosive media). A thorough understanding of how nano/micro-scale processes govern macroscopic properties—particularly degradation mechanisms in extreme environments—is essential for designing next-generation systems.

The aim of this Special Issue, titled “Advanced Surface Technology and Coating Materials”, is to bridge innovative fabrication with real-world performance through multiscale process–structure–property–performance studies. We seek contributions that elucidate the following: (1) linkages between synthesis techniques (e.g., green manufacturing with bio-derived precursors) and microstructural defects; (2) quantitative evaluation of service behavior in simulated extreme environments—both in space (atomic oxygen erosion, thermal cycling from −180 °C to +150 °C, radiation damage, vacuum outgassing) and terrestrial (high-temperature oxidation > 1000 °C, erosion–corrosion synergy, biofluid aging); and (3) predictive modeling integrating in situ characterization and accelerated life testing to forecast coating reliability in critical applications.

Prof. Dr. Qiang Wei
Guest Editor

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Keywords

  • multiscale manufacturing (nano to macro)
  • surface engineering
  • functional coatings
  • atomic layer deposition
  • extreme-environment performance evaluation
  • AI-driven performance prediction
  • accelerated life testing
  • in situ characterization
  • smart functional coatings
  • corrosion/oxidation resistance
  • bio-compatible films
  • tribology

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Published Papers (2 papers)

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Research

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27 pages, 12444 KB  
Article
Effects of Nb Content and Heat Treatment on the Microstructure and Properties of Plasma-Sprayed CoCrFeNiNbx High-Entropy Alloy Coatings on Ductile Iron Substrates
by Kaibo Zhu, Jie Wang and Biju Zheng
Materials 2026, 19(8), 1500; https://doi.org/10.3390/ma19081500 - 9 Apr 2026
Viewed by 584
Abstract
Ductile iron suffers from insufficient wear resistance under heavy-load service conditions. Surface engineering technologies offer effective solutions to this problem. However, current research on the application of atmospheric plasma-sprayed (APS) CoCrFeNiNbx high-entropy alloy (HEA) coatings on ductile iron and the systematic study [...] Read more.
Ductile iron suffers from insufficient wear resistance under heavy-load service conditions. Surface engineering technologies offer effective solutions to this problem. However, current research on the application of atmospheric plasma-sprayed (APS) CoCrFeNiNbx high-entropy alloy (HEA) coatings on ductile iron and the systematic study of compatible heat treatment processes with the substrate are still insufficient. In this study, CoCrFeNiNbx HEA coatings (x = 0.25, 0.50, 0.75, 1.00) were deposited on QT800-5 ductile iron by APS, and the effects of Nb content and low-temperature annealing (400–600 °C) on coating microstructure and properties were investigated. The x = 0.25 coating exhibited a single face-centered cubic (FCC) solid solution structure, while coatings with x ≥ 0.50 comprised an FCC solid solution and Cr2Nb-type Laves phase; hardness increased with Nb content, and as-sprayed wear resistance peaked at x = 0.75. Post-deposition annealing at 500 °C yielded a peak hardness of 477.45 HV and reduced the wear rate by 45% relative to the as-sprayed condition, with no measurable degradation of the substrate. These findings offer a practical reference for developing wear-resistant coatings on ductile iron components. Full article
(This article belongs to the Special Issue Advanced Surface Technology and Coating Materials)
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Review

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61 pages, 54564 KB  
Review
Recent Advances in Polypyrrole-Based Functional Coatings: Surface Protection and Emerging Applications
by Ge Cao, Qiuyuan Huang, Yueying Li, Zhenyu Wang and En-Hou Han
Materials 2026, 19(11), 2213; https://doi.org/10.3390/ma19112213 - 24 May 2026
Viewed by 879
Abstract
Owing to its inherent electrical conductivity, reversible redox activity, and structural versatility, polypyrrole (PPy) has become an important material for advanced functional coatings. This review summarizes recent advances in PPy-based coatings, systematically exploring the correlation between fundamental material design and macroscopic multifunctional applications. [...] Read more.
Owing to its inherent electrical conductivity, reversible redox activity, and structural versatility, polypyrrole (PPy) has become an important material for advanced functional coatings. This review summarizes recent advances in PPy-based coatings, systematically exploring the correlation between fundamental material design and macroscopic multifunctional applications. First, the core structural characteristics of PPy and its primary fabrication strategies, including electrochemical deposition, chemical oxidative polymerization, solution processing, and hybrid composite engineering, are delineated. Subsequently, the role of PPy in surface protection is analyzed, with an emphasis on the synergistic mechanisms underlying corrosion mitigation, mechanical durability, and environmental barriers (e.g., anti-fouling and solar-driven desalination). In addition, the application expansion of PPy in emerging fields, such as electromagnetic interference (EMI) shielding, highly sensitive smart sensing, electroactive energy interfaces, and advanced biomedical electrodes, is summarized. Finally, current challenges—particularly the physicochemical trade-offs among conductivity, interfacial adhesion, and long-term stability—are discussed, and future development directions are prospected. By integrating green processing technologies and data-driven smart system integration, next-generation PPy coatings are expected to meet the demands of flexible electronics, sustainable energy, and precision medicine. Full article
(This article belongs to the Special Issue Advanced Surface Technology and Coating Materials)
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