Surface & Coatings Technology最新文献

英文中文

Effects of Cr incorporation on the microstructure, tribological and mechanical properties of laser cladding (TiNbTaZr) 100-x Crx (x = 0, 5, 10, 20) high entropy alloy coatings

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-23 DOI: 10.1016/j.surfcoat.2025.132082

Guogang Wang, Jinna Liu, Xiufang Cui, Guo Jin, Shuo Wang, Wennan Su, Sitong Yang

Refractory high entropy alloy (RHEA) coatings have a wide application space in the field of titanium alloy surface protection. TiNbTaZr RHEA is a typical system of RHEAs which has excellent plasticity but insufficient strength, it is necessary to improve the strength of TiNbTaZr RHEA. In this work, laser cladding (TiNbTaZr) _100-x Cr_x (x = 0, 5, 10, 20) RHEA coatings are prepared on the surface of Ti-6Al-4 V substrate to overcome the damage of Ti-6Al-4 V substrate under wear and alternating stress. The effects of Cr incorporation on the microstructure evolution mechanism, mechanical and tribological properties of coatings are discussed in system. The results show that Cr can form Laves phase with other elements, the content of Laves phase increase with Cr content. Laves phase can improve the mechanical and tribological properties of the TiNbTaZr coating. (TiNbTaZr)₈₀Cr₂₀ coating with a higher compressive strength (2202.77 MPa) and ultimate fracture strain (25.6 %) exhibits a balance of strength and ductility, the reticulated structure formed by BCC phase prevents the decrease in ductility caused by the hard Laves phase. Meanwhile, the coatings have better tribological properties with the increase of Cr content, the (TiNbTaZr)₈₀Cr₂₀ coating possesses the lowest average friction coefficient (0.439) and the lowest wear rate (1.48 × 10⁻⁴ mm³/ (N·m)). Due to the oxidation reaction of Cr element, an oxide film is formed on the surface of the (TiNbTaZr)₈₀Cr₂₀ coating which has a positive effect on the tribological properties, the (TiNbTaZr)₈₀Cr₂₀ coating has better tribological properties compared to other three coatings.

{"title":"Effects of Cr incorporation on the microstructure, tribological and mechanical properties of laser cladding (TiNbTaZr) 100-x Crx (x = 0, 5, 10, 20) high entropy alloy coatings","authors":"Guogang Wang, Jinna Liu, Xiufang Cui, Guo Jin, Shuo Wang, Wennan Su, Sitong Yang","doi":"10.1016/j.surfcoat.2025.132082","DOIUrl":"10.1016/j.surfcoat.2025.132082","url":null,"abstract":"<div><div>Refractory high entropy alloy (RHEA) coatings have a wide application space in the field of titanium alloy surface protection. TiNbTaZr RHEA is a typical system of RHEAs which has excellent plasticity but insufficient strength, it is necessary to improve the strength of TiNbTaZr RHEA. In this work, laser cladding (TiNbTaZr) <sub>100-x</sub> Cr<sub>x</sub> (x = 0, 5, 10, 20) RHEA coatings are prepared on the surface of Ti-6Al-4 V substrate to overcome the damage of Ti-6Al-4 V substrate under wear and alternating stress. The effects of Cr incorporation on the microstructure evolution mechanism, mechanical and tribological properties of coatings are discussed in system. The results show that Cr can form Laves phase with other elements, the content of Laves phase increase with Cr content. Laves phase can improve the mechanical and tribological properties of the TiNbTaZr coating. (TiNbTaZr)<sub>80</sub>Cr<sub>20</sub> coating with a higher compressive strength (2202.77 MPa) and ultimate fracture strain (25.6 %) exhibits a balance of strength and ductility, the reticulated structure formed by BCC phase prevents the decrease in ductility caused by the hard Laves phase. Meanwhile, the coatings have better tribological properties with the increase of Cr content, the (TiNbTaZr)<sub>80</sub>Cr<sub>20</sub> coating possesses the lowest average friction coefficient (0.439) and the lowest wear rate (1.48 × 10<sup>−4</sup> mm<sup>3</sup>/ (N·m)). Due to the oxidation reaction of Cr element, an oxide film is formed on the surface of the (TiNbTaZr)<sub>80</sub>Cr<sub>20</sub> coating which has a positive effect on the tribological properties, the (TiNbTaZr)<sub>80</sub>Cr<sub>20</sub> coating has better tribological properties compared to other three coatings.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"505 ","pages":"Article 132082"},"PeriodicalIF":5.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143748500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Parametric investigation in an open atmosphere laser nitriding process of titanium aiming to minimize cracks

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-22 DOI: 10.1016/j.surfcoat.2025.132075

Kaito Yonemoto, Atsuto Yoshino, Yoshifumi Kitadate, Mitsuhiro Hirano, Naofumi Ohtsu

Open-atmosphere laser nitriding is a new technique for the formation of nitride layers on Ti surfaces in air. To form a crack-free nitride layer, the influence of processing parameters involving the beam-focusing condition and beam-scanning speed was carefully investigated. Ti surface irradiation using a defocused pulsed laser beam enhances energy transfer from the generated laser-induced plasma (LIP), enlarges the surface melting pool, and results in the formation of a thicker nitride layer compared to irradiation by an ideally focused laser beam. In addition, a lower scanning speed was linked to an increase in the number of repetitions of the pulsed beam, facilitating the penetration of the surrounding gases, mainly N, into the melt pool, thereby increasing the N content of the layer. The layer thickness and crystallographic phase of the nitride layer directly influenced the degree of crack formation; specifically, thinner layers mainly comprising TiN_0.3 exhibit significantly fewer cracks. By adjusting the beam parameters, nitride layers with different properties can be deposited on Ti surfaces, thereby broadening the range of Ti industrial applications.

{"title":"Parametric investigation in an open atmosphere laser nitriding process of titanium aiming to minimize cracks","authors":"Kaito Yonemoto, Atsuto Yoshino, Yoshifumi Kitadate, Mitsuhiro Hirano, Naofumi Ohtsu","doi":"10.1016/j.surfcoat.2025.132075","DOIUrl":"10.1016/j.surfcoat.2025.132075","url":null,"abstract":"<div><div>Open-atmosphere laser nitriding is a new technique for the formation of nitride layers on Ti surfaces in air. To form a crack-free nitride layer, the influence of processing parameters involving the beam-focusing condition and beam-scanning speed was carefully investigated. Ti surface irradiation using a defocused pulsed laser beam enhances energy transfer from the generated laser-induced plasma (LIP), enlarges the surface melting pool, and results in the formation of a thicker nitride layer compared to irradiation by an ideally focused laser beam. In addition, a lower scanning speed was linked to an increase in the number of repetitions of the pulsed beam, facilitating the penetration of the surrounding gases, mainly N, into the melt pool, thereby increasing the N content of the layer. The layer thickness and crystallographic phase of the nitride layer directly influenced the degree of crack formation; specifically, thinner layers mainly comprising TiN<sub>0.3</sub> exhibit significantly fewer cracks. By adjusting the beam parameters, nitride layers with different properties can be deposited on Ti surfaces, thereby broadening the range of Ti industrial applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"505 ","pages":"Article 132075"},"PeriodicalIF":5.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extraordinary oxidation behavior of W–Zr thin-film metallic glasses: A route for tailoring functional properties of W–Zr–O films

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-22 DOI: 10.1016/j.surfcoat.2025.132074

Petr Zeman, Michaela Červená, Jiří Houška, Stanislav Haviar, Jiří Rezek, Šárka Zuzjaková

The oxidation behavior of W–Zr thin-film metallic glasses (TFMGs) with 32, 48 and 61 at.% Zr, prepared by dc magnetron co-sputtering, was comprehensively studied after annealing in synthetic air. The study focuses on the effect of the annealing temperature (up to 600 °C) on the oxidation process, oxygen saturation, structure evolution, and their subsequent impact on electrical, optical and mechanical properties. The findings reveal that controlled oxidation transforms W–Zr TFMGs into amorphous ceramic W–Zr–O films with substoichiometric compositions. This is a consequence of an oxidation process that does not proceed through the formation of a stoichiometric oxide layer on the surface of W–Zr TFMGs, acting as a diffusion barrier against fast oxidation, but leads to a gradual incorporation of oxygen across the film volume due to thermodynamics factors. Higher Zr content accelerates the oxygen incorporation and its depth uniformity in the films. As a result, the mechanical properties are significantly enhanced achieving hardness values of up to 17.5 GPa at approximately 50 % oxygen saturation. Simultaneously, the electrical and optical properties are finely tuned with the resistivity and the extinction coefficient (measured at 550 nm) ranging from 1.7 to 95.7 × 10⁻⁴ Ω·cm and 0.28 to 1.06, respectively.

{"title":"Extraordinary oxidation behavior of W–Zr thin-film metallic glasses: A route for tailoring functional properties of W–Zr–O films","authors":"Petr Zeman, Michaela Červená, Jiří Houška, Stanislav Haviar, Jiří Rezek, Šárka Zuzjaková","doi":"10.1016/j.surfcoat.2025.132074","DOIUrl":"10.1016/j.surfcoat.2025.132074","url":null,"abstract":"<div><div>The oxidation behavior of W–Zr thin-film metallic glasses (TFMGs) with 32, 48 and 61 at.% Zr, prepared by dc magnetron co-sputtering, was comprehensively studied after annealing in synthetic air. The study focuses on the effect of the annealing temperature (up to 600 °C) on the oxidation process, oxygen saturation, structure evolution, and their subsequent impact on electrical, optical and mechanical properties. The findings reveal that controlled oxidation transforms W–Zr TFMGs into amorphous ceramic W–Zr–O films with substoichiometric compositions. This is a consequence of an oxidation process that does not proceed through the formation of a stoichiometric oxide layer on the surface of W–Zr TFMGs, acting as a diffusion barrier against fast oxidation, but leads to a gradual incorporation of oxygen across the film volume due to thermodynamics factors. Higher Zr content accelerates the oxygen incorporation and its depth uniformity in the films. As a result, the mechanical properties are significantly enhanced achieving hardness values of up to 17.5 GPa at approximately 50 % oxygen saturation. Simultaneously, the electrical and optical properties are finely tuned with the resistivity and the extinction coefficient (measured at 550 nm) ranging from 1.7 to 95.7 × 10<sup>−4</sup> Ω·cm and 0.28 to 1.06, respectively.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"505 ","pages":"Article 132074"},"PeriodicalIF":5.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-throughput composition screening of Pt-modified aluminide coating for corrosion resistance in molten Na2SO4-NaCl salts at 900 °C

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-21 DOI: 10.1016/j.surfcoat.2025.132071

Mengqi Li , Hui Peng , Hongbo Guo

A high-throughput magnetron sputtering technique was developed to fabricate multi-component Pt-modified aluminide ((Ni, Pt)Al) coatings to enhance corrosion resistance through compositional optimization. (Ni, Pt)Al, Dy-doped (Ni, Pt)Al, and Zr-doped (Ni, Pt)Al coatings were successfully prepared, all exhibiting dense and uniform microstructures with the thickness of approximately 30 μm. The (Ni, Pt)Al coatings featured compositional gradients of Pt (3–20 at.%) and Al (40–55 at.%). Increasing Pt content induced a phase transition from single-phase β-(Ni, Pt)Al to two-phase consisting of β-(Ni, Pt)Al and ζ-PtAl₂. The hot corrosion behavior of representative coatings was investigated in the Na₂SO₄/NaCl (75:25, wt%) environment at 900 °C for 100 h. The coating with the composition 45.1Ni-8.3Pt-46.6Al (at.%) exhibited superior performance, forming the thinnest and compact α-Al₂O₃ oxide scale (~5 μm) while exhibiting the smallest internal oxidation depth (~10 μm). Furthermore, Dy and Zr doping improved the hot corrosion resistance by delaying the θ-Al₂O₃ to α-Al₂O₃ phase transition and reducing stress-induced cracking. Zr was more effective between the two dopants, as Dy extended the presence of the less protective θ phase. The experimental results provide some theoretical guidance for the subsequent design of (Ni, Pt)Al coatings and can lead to the development of thermal barrier coatings in corrosive environments.

{"title":"High-throughput composition screening of Pt-modified aluminide coating for corrosion resistance in molten Na2SO4-NaCl salts at 900 °C","authors":"Mengqi Li , Hui Peng , Hongbo Guo","doi":"10.1016/j.surfcoat.2025.132071","DOIUrl":"10.1016/j.surfcoat.2025.132071","url":null,"abstract":"<div><div>A high-throughput magnetron sputtering technique was developed to fabricate multi-component Pt-modified aluminide ((Ni, Pt)Al) coatings to enhance corrosion resistance through compositional optimization. (Ni, Pt)Al, Dy-doped (Ni, Pt)Al, and Zr-doped (Ni, Pt)Al coatings were successfully prepared, all exhibiting dense and uniform microstructures with the thickness of approximately 30 μm. The (Ni, Pt)Al coatings featured compositional gradients of Pt (3–20 at.%) and Al (40–55 at.%). Increasing Pt content induced a phase transition from single-phase β-(Ni, Pt)Al to two-phase consisting of β-(Ni, Pt)Al and ζ-PtAl<sub>2</sub>. The hot corrosion behavior of representative coatings was investigated in the Na<sub>2</sub>SO<sub>4</sub>/NaCl (75:25, wt%) environment at 900 °C for 100 h. The coating with the composition 45.1Ni-8.3Pt-46.6Al (at.%) exhibited superior performance, forming the thinnest and compact α-Al<sub>2</sub>O<sub>3</sub> oxide scale (~5 μm) while exhibiting the smallest internal oxidation depth (~10 μm). Furthermore, Dy and Zr doping improved the hot corrosion resistance by delaying the θ-Al<sub>2</sub>O<sub>3</sub> to α-Al<sub>2</sub>O<sub>3</sub> phase transition and reducing stress-induced cracking. Zr was more effective between the two dopants, as Dy extended the presence of the less protective θ phase. The experimental results provide some theoretical guidance for the subsequent design of (Ni, Pt)Al coatings and can lead to the development of thermal barrier coatings in corrosive environments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"505 ","pages":"Article 132071"},"PeriodicalIF":5.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bipolar high-impulse electrophoretic process for cerium nanoparticle deposition on polylactic acid scaffolds

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-21 DOI: 10.1016/j.surfcoat.2025.132070

Luis Guilherme Silva Rosa , Luis César Fontana , Julio César Sagás , Eduardo Henrique Backes , Lidiane Cristina Costa , Samarah Vargas Harb , Leonardo A. Pinto , Ítalo M. Oliveira , Luiz Antonio Pessan , Daniela Becker

Electrophoretic deposition is a well-known technique for depositing micro and nanoparticles on substrates of different geometries. The deposited coatings have applications in various areas, especially biomedical uses. Nevertheless, few studies focus on electrophoretic deposition on non-conductive substrates such as biopolymer scaffolds. The present paper uses a modified electrophoretic process to investigate the deposition of cerium oxide nanoparticles (CeO-NPs) on a polylactic acid (PLA) biocomposite scaffold substrate. The substrates were arranged in two ways: one with the scaffold samples freely moving in the liquid medium between the electrodes and the other with the scaffolds attached to the biased electrode. This paper's main goal is to use bipolar pulsed high voltages (if compared to traditional values used in electrophoretic deposition) with a time-off between pulses trains to control the power and prevent overheating. SEM and XPS analyses confirmed the nanoparticles' presence both on the surface – with Ce/C ratio up to 7.6 × 10⁻² for the freely moving scaffolds and 2.8 × 10⁻² for those attached to the biased electrode – and inside the scaffold's pores – presenting Ce/C ratio up to 2.2 × 10⁻² on one scaffold immersed in ethanolic medium – but also found agglomerates. Cell viability tests showed that the treated scaffolds enhance cell spreading and can be further studied for biomedical applications. The results also show that the agitation allied with altering voltage pulses may be beneficial for the deposition on the scaffold's surface and interior using water as solvent.

{"title":"Bipolar high-impulse electrophoretic process for cerium nanoparticle deposition on polylactic acid scaffolds","authors":"Luis Guilherme Silva Rosa , Luis César Fontana , Julio César Sagás , Eduardo Henrique Backes , Lidiane Cristina Costa , Samarah Vargas Harb , Leonardo A. Pinto , Ítalo M. Oliveira , Luiz Antonio Pessan , Daniela Becker","doi":"10.1016/j.surfcoat.2025.132070","DOIUrl":"10.1016/j.surfcoat.2025.132070","url":null,"abstract":"<div><div>Electrophoretic deposition is a well-known technique for depositing micro and nanoparticles on substrates of different geometries. The deposited coatings have applications in various areas, especially biomedical uses. Nevertheless, few studies focus on electrophoretic deposition on non-conductive substrates such as biopolymer scaffolds. The present paper uses a modified electrophoretic process to investigate the deposition of cerium oxide nanoparticles (CeO-NPs) on a polylactic acid (PLA) biocomposite scaffold substrate. The substrates were arranged in two ways: one with the scaffold samples freely moving in the liquid medium between the electrodes and the other with the scaffolds attached to the biased electrode. This paper's main goal is to use bipolar pulsed high voltages (if compared to traditional values used in electrophoretic deposition) with a time-off between pulses trains to control the power and prevent overheating. SEM and XPS analyses confirmed the nanoparticles' presence both on the surface – with Ce/C ratio up to 7.6 × 10<sup>−2</sup> for the freely moving scaffolds and 2.8 × 10<sup>−2</sup> for those attached to the biased electrode – and inside the scaffold's pores – presenting Ce/C ratio up to 2.2 × 10<sup>−2</sup> on one scaffold immersed in ethanolic medium – but also found agglomerates. Cell viability tests showed that the treated scaffolds enhance cell spreading and can be further studied for biomedical applications. The results also show that the agitation allied with altering voltage pulses may be beneficial for the deposition on the scaffold's surface and interior using water as solvent.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"504 ","pages":"Article 132070"},"PeriodicalIF":5.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lanthanide co-doped YSZ double-ceramic-layer thermal barrier coatings: Unlocking superior sintering resistance, thermal durability, and insulation for extreme environments

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.surfcoat.2025.132069

Kehan Yang , Junmiao Shi , Fuqiang Tian , Xiaolong Chen , Kaiming Zhang , Xiancheng Zhang

The phase instability and poor sintering resistance of conventional 8YSZ limit its use in advanced thermal barrier coatings (TBCs). To overcome these limitations, a novel Gd and Yb co-doped YSZ (RYSZ) powder was developed and used to fabricate the double-ceramic-layer (DCL) RYSZ/8YSZ TBC via atmospheric plasma spraying (APS), which were systematically compared with single-layer RYSZ and 8YSZ TBCs. RYSZ exhibited excellent phase stability, with no transformation after 200 h at 1400 °C, unlike 8YSZ, where m-ZrO₂ phase increased from 0 % to 34.2 %. The DCL TBC showed superior sintering resistance, with porosity reductions of only 29.89 % after 200 h at 1150 °C, compared to 73.94 % for the single-layer 8YSZ TBC. In thermal shock cycling, the DCL TBC remained intact after 60 cycles, outperforming single-layer RYSZ and 8YSZ TBCs, which failed at 35 and 40 cycles, respectively. Additionally, the DCL TBC achieved excellent thermal insulation, with a 313.4 °C temperature drop at 1500 °C. The DCL RYSZ/8YSZ structure emerges as the optimal configuration, combining phase stability, sintering resistance, and thermal durability, paving the way for next-generation TBCs in extreme environments.

{"title":"Lanthanide co-doped YSZ double-ceramic-layer thermal barrier coatings: Unlocking superior sintering resistance, thermal durability, and insulation for extreme environments","authors":"Kehan Yang , Junmiao Shi , Fuqiang Tian , Xiaolong Chen , Kaiming Zhang , Xiancheng Zhang","doi":"10.1016/j.surfcoat.2025.132069","DOIUrl":"10.1016/j.surfcoat.2025.132069","url":null,"abstract":"<div><div>The phase instability and poor sintering resistance of conventional 8YSZ limit its use in advanced thermal barrier coatings (TBCs). To overcome these limitations, a novel Gd and Yb co-doped YSZ (RYSZ) powder was developed and used to fabricate the double-ceramic-layer (DCL) RYSZ/8YSZ TBC via atmospheric plasma spraying (APS), which were systematically compared with single-layer RYSZ and 8YSZ TBCs. RYSZ exhibited excellent phase stability, with no transformation after 200 h at 1400 °C, unlike 8YSZ, where <em>m</em>-ZrO₂ phase increased from 0 % to 34.2 %. The DCL TBC showed superior sintering resistance, with porosity reductions of only 29.89 % after 200 h at 1150 °C, compared to 73.94 % for the single-layer 8YSZ TBC. In thermal shock cycling, the DCL TBC remained intact after 60 cycles, outperforming single-layer RYSZ and 8YSZ TBCs, which failed at 35 and 40 cycles, respectively. Additionally, the DCL TBC achieved excellent thermal insulation, with a 313.4 °C temperature drop at 1500 °C. The DCL RYSZ/8YSZ structure emerges as the optimal configuration, combining phase stability, sintering resistance, and thermal durability, paving the way for next-generation TBCs in extreme environments.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"504 ","pages":"Article 132069"},"PeriodicalIF":5.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct detection of radiation via luminescence-to-electrical signal conversion in a hybrid Ce:YAP-TiO₂ scintillator

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.surfcoat.2025.132066

Marilou Cadatal-Raduban , Yuki Maruyama , Kota Hibino , Michal Kohout , Kohei Yamanoi , Carlito S. Ponseca Jr. , Zdeněk Hubička , Shingo Ono , Jiří Olejníček

This study explores the development of a hybrid scintillation system for vacuum ultraviolet (VUV) radiation detection, combining cerium-doped yttrium‑aluminum perovskite (Ce:YAP) with a photoconductive titanium dioxide (TiO₂) layer. This system enables direct conversion of scintillation luminescence into electrical signals, eliminating the need for a standalone photodetector. The effects of thermal treatment, including substrate heating during TiO₂ deposition and post-deposition annealing, on the hybrid system's properties were investigated. The results show that thermal processing enhances TiO₂ crystallinity, improves the luminescence properties of Ce:YAP, and significantly increases the photosensitivity of the hybrid scintillator. This research highlights the potential of hybrid approaches for radiation detection in applications spanning science, medicine, and industry.

引用次数: 0

B induces Cr grain boundary enrichment and the enhanced anti-tribocorrosion property of HEA composite coatings

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.surfcoat.2025.132064

Guo-Dong Chen , Hong-Liang Zhao , Jin-Peng Zhu , Kai-Ming Wang , Guang-Wei Peng , Dong Hu , Yue-Ming Wang , Xiu-Bo Liu

The high-entropy composite coatings with TaC and B-reinforced FeCoCrNiCu were successfully prepared by laser cladding to investigate their wear, corrosion, and tribo-corrosion behaviors. Different from the fine grain strengthening caused by the direct addition of TaC, the doping of B induced the obvious enrichment of Cr at the grain boundary and Cr₂B is precipitated. Thus, the microhardness of the B-doped coating is strengthened to 343.98 HV_0.5, which is 2.14 times that of the substrate. The high proportion of less-angle grain boundaries significantly improves the durability of coatings in corrosive environments by reducing grain boundary energy, reducing active sites and optimizing grain boundary grid stability. And, the B-enhanced coating exhibits chemical inertness, making them less likely to react with corrosive substances in the environment. This property helps inhibit corrosion and wear. The corrosion resistance of the coating is greatly improved. In B reinforced coating, the I_corr value (0.17 × 10⁻⁶ A/cm²) is 0.08 times that of the substrate. The advanced corrosion-wear resistance (1.33 × 10⁻⁶ mm³/Nm) is also obtained by B-enhanced coating, which decreased by 96.8 % compared to substrate. From the three tests including wear, corrosion, and tribocorrosion, the corrosion-wear behavior of B doped coating is dominated by anti-corrosion.

{"title":"B induces Cr grain boundary enrichment and the enhanced anti-tribocorrosion property of HEA composite coatings","authors":"Guo-Dong Chen , Hong-Liang Zhao , Jin-Peng Zhu , Kai-Ming Wang , Guang-Wei Peng , Dong Hu , Yue-Ming Wang , Xiu-Bo Liu","doi":"10.1016/j.surfcoat.2025.132064","DOIUrl":"10.1016/j.surfcoat.2025.132064","url":null,"abstract":"<div><div>The high-entropy composite coatings with TaC and B-reinforced FeCoCrNiCu were successfully prepared by laser cladding to investigate their wear, corrosion, and tribo-corrosion behaviors. Different from the fine grain strengthening caused by the direct addition of TaC, the doping of B induced the obvious enrichment of Cr at the grain boundary and Cr<sub>2</sub>B is precipitated. Thus, the microhardness of the B-doped coating is strengthened to 343.98 HV<sub>0.5</sub>, which is 2.14 times that of the substrate. The high proportion of less-angle grain boundaries significantly improves the durability of coatings in corrosive environments by reducing grain boundary energy, reducing active sites and optimizing grain boundary grid stability. And, the B-enhanced coating exhibits chemical inertness, making them less likely to react with corrosive substances in the environment. This property helps inhibit corrosion and wear. The corrosion resistance of the coating is greatly improved. In B reinforced coating, the I<sub>corr</sub> value (0.17 × 10<sup>−6</sup> A/cm<sup>2</sup>) is 0.08 times that of the substrate. The advanced corrosion-wear resistance (1.33 × 10<sup>−6</sup> mm<sup>3</sup>/Nm) is also obtained by B-enhanced coating, which decreased by 96.8 % compared to substrate. From the three tests including wear, corrosion, and tribocorrosion, the corrosion-wear behavior of B doped coating is dominated by anti-corrosion.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"504 ","pages":"Article 132064"},"PeriodicalIF":5.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of thickness ratio on phase structures, mechanical properties, and oxidation resistance of CrSiN/WSiN bilayer films

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.surfcoat.2025.132068

Yung-I Chen , Li-Zhu Wang , Yu-Ting Ye , Li-Chun Chang , Heng-Ching Yu

The high oxidation resistance of CrSiN films and the high hardness of WSiN films inspired the fabrication of CrSiN/WSiN bilayer films to combine both advantages. This study deposited CrSiN/WSiN bilayer films of approximately 1 μm with various thickness ratios through direct current magnetron cosputtering. Cr, Si, and W targets were used to deposit WSiN and CrSiN sublayers. The thickness ratios of the WSiN to the CrSiN sublayer were 1.3, 2.4, 3.2, and 4.2, respectively, by regulating the deposition times. The influences of the sublayer thickness ratio (WSiN/CrSiN) on the bilayer film's characteristics were explored. The monolithic CrSiN and WSiN sublayers had FCC and amorphous phases, respectively. The CrN (111) intensity of CrSiN/WSiN bilayer films becomes more pronounced with increasing the CrSiN sublayer thickness and decreasing the sublayer thickness ratio. The hardness of the CrSiN/WSiN bilayer films increased from 11.3 to 17.7 GPa with decreased CrSiN sublayer thickness, whereas the elastic modulus increased from 234 to 266 GPa. The wear resistance of these CrSiN/WSiN bilayer films was evaluated through the pin-on-disk tests. The oxidation resistance of these CrSiN/WSiN bilayer films was examined after annealing at 600–800 °C. The CrSiN sublayers advanced the oxidation and wear resistance of the bilayer films.

{"title":"Effects of thickness ratio on phase structures, mechanical properties, and oxidation resistance of CrSiN/WSiN bilayer films","authors":"Yung-I Chen , Li-Zhu Wang , Yu-Ting Ye , Li-Chun Chang , Heng-Ching Yu","doi":"10.1016/j.surfcoat.2025.132068","DOIUrl":"10.1016/j.surfcoat.2025.132068","url":null,"abstract":"<div><div>The high oxidation resistance of CrSiN films and the high hardness of WSiN films inspired the fabrication of CrSiN/WSiN bilayer films to combine both advantages. This study deposited CrSiN/WSiN bilayer films of approximately 1 μm with various thickness ratios through direct current magnetron cosputtering. Cr, Si, and W targets were used to deposit WSiN and CrSiN sublayers. The thickness ratios of the WSiN to the CrSiN sublayer were 1.3, 2.4, 3.2, and 4.2, respectively, by regulating the deposition times. The influences of the sublayer thickness ratio (WSiN/CrSiN) on the bilayer film's characteristics were explored. The monolithic CrSiN and WSiN sublayers had FCC and amorphous phases, respectively. The CrN (111) intensity of CrSiN/WSiN bilayer films becomes more pronounced with increasing the CrSiN sublayer thickness and decreasing the sublayer thickness ratio. The hardness of the CrSiN/WSiN bilayer films increased from 11.3 to 17.7 GPa with decreased CrSiN sublayer thickness, whereas the elastic modulus increased from 234 to 266 GPa. The wear resistance of these CrSiN/WSiN bilayer films was evaluated through the pin-on-disk tests. The oxidation resistance of these CrSiN/WSiN bilayer films was examined after annealing at 600–800 °C. The CrSiN sublayers advanced the oxidation and wear resistance of the bilayer films.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"504 ","pages":"Article 132068"},"PeriodicalIF":5.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of carbon-based materials by methane pyrolysis in a low-current gliding arc discharge

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2025-03-20 DOI: 10.1016/j.surfcoat.2025.132063

Yuan Tian , Assan Abdirakhmanov , Xiaoyu Wang , Pierre Mathieu , Luis Flores-Larrea , Maureen J. Lagos , Nathalie De Geyter , Carla Bittencourt , Rony Snyders

In this study, a low-current (25–75 mA) gliding arc discharge (GAD) system was utilized for the synthesis of carbon-based materials. We investigated the effects of discharge current (I) and methane concentration (Φ_CH4) on the discharge features and the carbon materials properties.

We observed a strong influence of the discharge current on the discharge behavior. For the lowest I value (I = 25 mA), the plasma is confined and emits blue light. In this condition, no carbon formation is observed (whatever Φ_CH4 is), revealing a too low associated discharge power (P_D) to allow for a significant dissociation of CH₄. When increasing I, the plasma features are strongly affected with the appearance of a yellow flame, associated with the production of incipient soot, expanding as a function of I. In these conditions, carbon is always generated. We observed that a high enough discharge current (I = 75 mA) is necessary to allow for a stable plasma in the entire Φ_CH4 range.

Characterization of carbon products reveals the formation of two distinct types of carbon nanomaterials: graphene nanoflakes (GNFs), including single-layer, bilayer, and multilayer structures, predominantly synthesized at Φ_CH4 = 10 %, and carbon nanoparticles (CNPs), primarily generated at higher Φ_CH4. For multilayer GNFs, two morphologies—“flat platelet” and “wrinkled layer”—were identified through Annular Dark-Field Scanning Transmission Electron Microscopy (ADF-STEM) images. For CNPs, a comparative thermogravimetric analysis (TGA) and derivative thermogravimetric (DTG) study with commercial carbon blacks (CBs) reveals that the thermal stability and purity of CNPs improves with increasing P_D, shifting their properties closer to those of CBs.

{"title":"Synthesis of carbon-based materials by methane pyrolysis in a low-current gliding arc discharge","authors":"Yuan Tian , Assan Abdirakhmanov , Xiaoyu Wang , Pierre Mathieu , Luis Flores-Larrea , Maureen J. Lagos , Nathalie De Geyter , Carla Bittencourt , Rony Snyders","doi":"10.1016/j.surfcoat.2025.132063","DOIUrl":"10.1016/j.surfcoat.2025.132063","url":null,"abstract":"<div><div>In this study, a low-current (25–75 mA) gliding arc discharge (GAD) system was utilized for the synthesis of carbon-based materials. We investigated the effects of discharge current (I) and methane concentration (Φ<sub>CH4</sub>) on the discharge features and the carbon materials properties.</div><div>We observed a strong influence of the discharge current on the discharge behavior. For the lowest I value (<em>I</em> = 25 mA), the plasma is confined and emits blue light. In this condition, no carbon formation is observed (whatever Φ<sub>CH4</sub> is), revealing a too low associated discharge power (P<sub>D</sub>) to allow for a significant dissociation of CH<sub>4</sub>. When increasing I, the plasma features are strongly affected with the appearance of a yellow flame, associated with the production of incipient soot, expanding as a function of I. In these conditions, carbon is always generated. We observed that a high enough discharge current (<em>I</em> = 75 mA) is necessary to allow for a stable plasma in the entire Φ<sub>CH4</sub> range.</div><div>Characterization of carbon products reveals the formation of two distinct types of carbon nanomaterials: graphene nanoflakes (GNFs), including single-layer, bilayer, and multilayer structures, predominantly synthesized at Φ<sub>CH4</sub> = 10 %, and carbon nanoparticles (CNPs), primarily generated at higher Φ<sub>CH4</sub>. For multilayer GNFs, two morphologies—“flat platelet” and “wrinkled layer”—were identified through Annular Dark-Field Scanning Transmission Electron Microscopy (ADF-STEM) images. For CNPs, a comparative thermogravimetric analysis (TGA) and derivative thermogravimetric (DTG) study with commercial carbon blacks (CBs) reveals that the thermal stability and purity of CNPs improves with increasing P<sub>D</sub>, shifting their properties closer to those of CBs.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"505 ","pages":"Article 132063"},"PeriodicalIF":5.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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