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Performance and Applications of Environmental Barrier Coatings (EBCs)/Thermal Barrier Coatings...
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Performance and Applications of Environmental Barrier Coatings (EBCs)/Thermal Barrier Coatings (TBCs)

A Special Issue of Coatings (ISSN 2079-6412) belonging to the section "Ceramic Coatings and Engineering Technology".

Deadline for manuscript submissions: 20 January 2027 | Viewed by 1329

Editors

Dr. Muhammet Karabaş

E-Mail Website
Guest Editor
Mechanical Engineering Department, Kırklareli University, Kırklareli 39000, Turkiye
Interests: thermal/environmental barrier coatings
Dr. Ali Avcı

E-Mail Website
Guest Editor
Mechanical Engineering Department, Hakkari University, Hakkari 30000, Turkiye
Interests: thermal/environmental barrier coatings

Special Issue Information

Dear Colleagues,

As the demand for higher efficiency and lower emissions in aerospace and land-based gas turbines grows, the operating temperatures of hot-section components continue to rise. To withstand these extreme environments, the development of advanced protective coatings is no longer an option but a necessity. This Special Issue focuses on the latest breakthroughs in Thermal Barrier Coatings (TBCs) and Environmental Barrier Coatings (EBCs), which serve as the primary defense lines for metallic and ceramic matrix composite (CMC) substrates.

The goal of this Special Issue is to collect high-quality research and review articles that address the fundamental challenges and industrial applications of protective coatings. We aim to bridge the gap between material design, processing techniques, and long-term durability under harsh service conditions (e.g., CMAS attack, high-temperature oxidation, and thermal cycling).

We invite submissions covering, but not limited to, the following areas:

  • Novel Materials: Development of next-generation ceramics (e.g., rare-earth silicates, zirconates, and high-entropy oxides).
  • Deposition Techniques: Advances in EB-PVD, APS, PS-PVD, and suspension/solution precursor spraying.
  • Failure Mechanisms: Investigation of TGO growth, delamination, and thermomechanical fatigue.
  • Environmental Resistance: Strategies to mitigate Calcium-Magnesium-Alumino-Silicate (CMAS) infiltration and water vapor corrosion.
  • Advanced Testing & Modeling: Non-destructive evaluation (NDE), life prediction models, and multiscale simulation of coating behavior.
  • CMC Protection: Specialized EBC solutions for SiC/SiC and other ceramic composites.

By bringing together contributions from leading scientists and engineers, this Special Issue seeks to provide a comprehensive overview of the current state-of-the-art and future trends in coating technology. We look forward to receiving your innovative work.

Dr. Muhammet Karabaş
Dr. Ali Avcı
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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

  • durability
  • CMAS (Calcium-Magnesium-Alumino-Silicate) infiltration
  • hot corrosion
  • ceramic matrix composites (CMCs)
  • rare-earth silicates&zirconates
  • high-entropy ceramics
  • machine learning in coating design
  • life prediction modeling

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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

17 pages, 2470 KB  
Article
Yb-Doped ZrO2 for Thermal Barrier Coatings: A Common Compositional Boundary at 1300 °C
by He Tian, Limin He and Rende Mu
Coatings 2026, 16(8), 969; https://doi.org/10.3390/coatings16080969 - 14 Aug 2026
Viewed by 457
Abstract
Yttria-stabilized zirconia (YSZ) thermal barrier coatings suffer from t′ phase destabilization and insufficient thermal insulation above 1200 °C. In this work, YbO1.5-stabilized ZrO2 powders (xYbSZ, x = 4–12 mol% YbO1.5 on a cation basis, equivalent to 2–6 mol% Yb [...] Read more.
Yttria-stabilized zirconia (YSZ) thermal barrier coatings suffer from t′ phase destabilization and insufficient thermal insulation above 1200 °C. In this work, YbO1.5-stabilized ZrO2 powders (xYbSZ, x = 4–12 mol% YbO1.5 on a cation basis, equivalent to 2–6 mol% Yb2O3) were synthesized by chemical co-precipitation, consolidated by spark plasma sintering, and evaluated at 1300 °C in terms of phase stability, sintering behavior, thermal conductivity, and fracture toughness. A common compositional boundary near 8 mol% YbO1.5 was identified across all four responses. 8YbSZ retained the metastable t′ phase with a monoclinic content below 10 mol% after 300 h at 1300 °C, whereas grain coarsening accelerated markedly and the thermal conductivity reduction efficiency per unit doping at 1000 °C was approximately halved beyond this composition, with κ decreasing from 2.41 to 1.96 W·m−1·K−1 across the series. The toughness gain produced by thermal treatment fell from 34% (4YbSZ) to about 10% (10–12YbSZ) as the dominant toughening mechanism shifted from transformation and microcrack toughening (4–6 mol%) to ferroelastic domain switching (8 mol%), with both being lost in the compositions in which the cubic phase predominated. These results identify 8 mol% YbO1.5 as the optimal composition balancing phase stability, sintering resistance, thermal insulation, and mechanical integrity for TBC applications at 1300 °C. Full article
(This article belongs to the Special Issue Performance and Applications of Environmental Barrier Coatings (EBCs)/Thermal Barrier Coatings (TBCs))
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12 pages, 12569 KB  
Article
Microstructural Evolution and Thermal Transport in APS SrZrO3 Coatings: An EBSD-Focused Study
by Matiullah Khan and Yi Zeng
Coatings 2026, 16(6), 729; https://doi.org/10.3390/coatings16060729 - 18 Jun 2026
Cited by 1 | Viewed by 363
Abstract
This work reports the combination of pentagonal grain morphology, high phase purity, and non-monotonic thermal conductivity behavior over a wide temperature range (25–1200 °C). The SrZrO3 coatings with different processing parameters are deposited using atmospheric plasma spraying (APS). Unlike conventional atmospheric plasma-sprayed [...] Read more.
This work reports the combination of pentagonal grain morphology, high phase purity, and non-monotonic thermal conductivity behavior over a wide temperature range (25–1200 °C). The SrZrO3 coatings with different processing parameters are deposited using atmospheric plasma spraying (APS). Unlike conventional atmospheric plasma-sprayed oxide coatings, distinct pentagonal-shaped grains with multi-directional orientation suggest a unique solidification pathway and anisotropic growth mechanism. The pentagonal morphology may come from the impingement of five radially columnar grain sectors during rapid solidification of a highly undercooled melt splat, constrained by local thermal gradients. This atypical morphology, not commonly reported for SrZrO3 coatings, is further supported by electron backscatter diffraction (EBSD) results, which confirm a remarkably high phase fraction (~94.5%) of SrZrO3 despite rapid quenching inherent to APS processing. The combination of high phase purity and unusual grain geometry represents a significant advancement in tailoring the microstructures of environmental barrier materials. Moreover, the non-linear thermal conductivity response with temperature shows a pronounced decrease up to ~800 °C (0.737 W·m−1·K−1) stabilization between 800 and 900 °C, and a subsequent increase at higher temperatures. This behavior indicates a complex interplay between phonon scattering, defect structures, and possible radiative heat transfer contributions at elevated temperatures. Full article
(This article belongs to the Special Issue Performance and Applications of Environmental Barrier Coatings (EBCs)/Thermal Barrier Coatings (TBCs))
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