Weilu Gong , Yiming Yang , Ziwei Li , Li Ye , Haifeng Cui , Weijian Han , PingXia Zhang , Tong Zhao , Teng Chen
{"title":"Effects of W contents on the oxidation resistance of (Zr, Hf, Nb, Ta, W)C high-entropy carbides at 800–1200 °C","authors":"Weilu Gong , Yiming Yang , Ziwei Li , Li Ye , Haifeng Cui , Weijian Han , PingXia Zhang , Tong Zhao , Teng Chen","doi":"10.1016/j.jeurceramsoc.2025.117367","DOIUrl":"10.1016/j.jeurceramsoc.2025.117367","url":null,"abstract":"<div><div>Oxidation resistance of high-entropy carbides is a critical property considering their possible applications in harsh environments. In this work, the oxidation resistance of non-equimolar (Zr, Hf, Nb, Ta, W)C high-entropy carbides (HECCs-W) containing different W content was studied. The results showed that the antioxidation property of the HECCs-W was affected by both W content and oxidation temperature. In-situ oxidation monitoring by high temperature X-ray diffractometer and theoretical calculation results found delayed oxidation effect of W atoms. Combining morphology analysis and phase compositions of the oxide layers, we concluded that the content of W and its oxidation rate at different temperature affected the content of (Nb, Ta, Zr, Hf)<sub>x</sub>W<sub>y</sub>O<sub>z</sub> in the oxide layer, which substantially affected the morphology of the oxide layer, for (Nb, Ta, Zr, Hf)<sub>x</sub>W<sub>y</sub>O<sub>z</sub> usually had a low or negative thermal expansion coefficient. And the morphology of the oxide layer consequently decided the oxidation resistance of the HECCs-W.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117367"},"PeriodicalIF":5.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628315","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}
Zihan Zhou , Tianyuan Zhou , Dongshun Chen , Hongsen Wang , Lele Xu , Enjin Liu , Yuhua Wang , Zhongzhi Wang , Wieslaw Strek , Qiufeng Xu , Hao Chen , Le Zhang
{"title":"Synergetic effect of oxygen vacancy and Cr triggered super-long persistent luminescence in green Ce, Cr: YAGG transparent ceramics","authors":"Zihan Zhou , Tianyuan Zhou , Dongshun Chen , Hongsen Wang , Lele Xu , Enjin Liu , Yuhua Wang , Zhongzhi Wang , Wieslaw Strek , Qiufeng Xu , Hao Chen , Le Zhang","doi":"10.1016/j.jeurceramsoc.2025.117364","DOIUrl":"10.1016/j.jeurceramsoc.2025.117364","url":null,"abstract":"<div><div>Ce, Cr: Y<sub>3</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> (Ce, Cr: YAGG) as a new long afterglow material has a considerable developing potential in the fields of emergency indicator, optical information storage and bio-imaging, etc. However, short afterglow duration time and low afterglow brightness have become the key bottlenecks hindering its real applications. In this study, a high initial brightness of 6243.5 mcd/m<sup>2</sup> and a long duration time of nearly 30 h were obtained in Ce, Cr: YAGG transparent ceramics (after being excited by a 460 nm Xe lamp for 10 min). The afterglow performances of Ce, Cr: YAGG ceramic could be significantly promoted by elevating sintering temperature, applying TEOS as sintering additive and adopting HIP sintering. More oxygen vacancies (relative amount of 32.9 %) within ceramic, compared to vacuum sintering (16.1 %), and Si induced charge compensation of Cr synergetically reinforced afterglow performance of ceramic, while ceramic transparency had a negative impact on it. A competition relationship between the “volume effect” and “light-extraction effect” was revealed in the thick and transparent afterglow medium. A new design strategy for enhancing afterglow performances of long afterglow transparent ceramics was proposed in this study.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117364"},"PeriodicalIF":5.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621369","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}
Yongheng Zhang , Jixin Chen , Hao Zhang , Guorui Zhao , Zhihui Li , Xiaohui Wang , Fei Li
{"title":"Hexagonal boron nitride ceramic reinforced with a dispersed glass phase and microdomain-extruded glass fibers","authors":"Yongheng Zhang , Jixin Chen , Hao Zhang , Guorui Zhao , Zhihui Li , Xiaohui Wang , Fei Li","doi":"10.1016/j.jeurceramsoc.2025.117362","DOIUrl":"10.1016/j.jeurceramsoc.2025.117362","url":null,"abstract":"<div><div>Hexagonal boron nitride (<em>h</em>-BN) is an important engineering ceramic material. However, its layered structure and poor sinterability often result in suboptimal mechanical properties. In this study, <em>h</em>-BN was simultaneously reinforced with a dispersed ytterbium aluminosilicate (YbAS) glass phase and novel in situ microdomain-extruded glass fibers. In situ–formed glass fibers play a vital role in enhancing the composite’s mechanical properties. <em>h</em>-BN/30 vol% YbAS composite sintered at 1600°C showed optimal mechanical properties, with flexural strength, compressive strength, fracture toughness, and elastic modulus of 436 ± 59 MPa, 1072 ± 86 MPa, 4.2 ± 0.3 MPa·m<sup>1/2</sup>, and 90.2 ± 0.1 GPa, respectively. The strengthening mechanisms include the co-reinforcement effect, mechanical locking provided by the YbAS glass fibers, and robust interfacial bonding between the <em>h</em>-BN grains and the YbAS glass phase. The proposed novel microstructural design offers a promising pathway for strengthening ceramic performance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117362"},"PeriodicalIF":5.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611193","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}
Agnieszka Szysiak , Robert Tomala , Helena Węglarz , Juraj Kajan , Mirosław Słobodzian , Mykhailo Chaika
{"title":"Toward more performant eye safe lasers: Effect of increasing sensitizer amount in Yb3 +,Er3+:YAG transparent ceramic on its spectral characteristics","authors":"Agnieszka Szysiak , Robert Tomala , Helena Węglarz , Juraj Kajan , Mirosław Słobodzian , Mykhailo Chaika","doi":"10.1016/j.jeurceramsoc.2025.117365","DOIUrl":"10.1016/j.jeurceramsoc.2025.117365","url":null,"abstract":"<div><div>Developing efficient Er<sup>3+</sup>,Yb<sup>3+</sup>:YAG eye-safe lasers is a priority of modern laser technology. This paper focuses on the influence of the concentration of Yb<sup>3+</sup> ions on the spectroscopic properties of Er<sup>3+</sup>,Yb<sup>3+</sup>:YAG transparent ceramics. Four samples with different concentrations of Yb<sup>3+</sup> ions were prepared by solid-state reaction sintering. The study revealed the influence of Yb<sup>3+</sup> ions on the microstructure and the sintering process. A high concentration of Yb<sup>3+</sup> ions leads to the formation of Y<sup>3+</sup>-rich impurity phases and causes segregation of Er<sup>3+</sup> and Yb<sup>3+</sup> and Si<sup>4+</sup> into these phases. The influence of Yb<sup>3+</sup> ions on the shape of emission spectra and the lifetimes of both Er<sup>3+</sup> and Yb<sup>3+</sup> ions was shown. Changes in the spectroscopic properties were ascribed to increase in neat transfer between Yb<sup>3+</sup> and Er<sup>3+</sup> ions. IQE of Er<sup>3+</sup> and Yb<sup>3+</sup> luminescence were calculated, and optimal Er<sup>3+</sup>/Yb<sup>3+</sup> ions ratio were proposed.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 11","pages":"Article 117365"},"PeriodicalIF":5.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678929","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}
Maryam Vakhshouri , Ali Talimian , Aliasghar Najafzadehkhoee , Ángela Gallardo-López , Rosalía Poyato , Felipe Gutiérrez-Mora , Dušan Galusek
{"title":"Fabrication of Al2O3-Y3Al5O12-ZrO2 composites by single-step spark plasma sintering","authors":"Maryam Vakhshouri , Ali Talimian , Aliasghar Najafzadehkhoee , Ángela Gallardo-López , Rosalía Poyato , Felipe Gutiérrez-Mora , Dušan Galusek","doi":"10.1016/j.jeurceramsoc.2025.117358","DOIUrl":"10.1016/j.jeurceramsoc.2025.117358","url":null,"abstract":"<div><div>Fabricating Al<sub>2</sub>O<sub>3</sub>-Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>-ZrO<sub>2</sub> ceramic composites with a eutectic microstructure is challenging and costly, as it requires high-temperature melting of precursor materials. Here, we report on the successful production of Al<sub>2</sub>O<sub>3</sub>-Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>- 5 mol% ZrO<sub>2</sub> composites with lamellar eutectic microstructure through single-step spark plasma sintering (SPS) of sol-gel synthesized powder. The release of volatile species from partially calcined powders, due to limited calcination at 1000°C for 2 h, as well as their fine particle size, were used to create the conditions for local electric discharge and plasma formation during SPS; this resulted in the local formation of eutectic liquids, enabling the formation of lamellar microstructures. The microstructural features can be tailored by modifying the calcination process.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117358"},"PeriodicalIF":5.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611192","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}
Guohui Wang , Pengrong Ren , Xiangcheng Qi , Kai Li , Lang Bian , Xin Wang , Peng Zhang , Chaowei Guo , Fangping Zhuo
{"title":"Tailoring combined “soft” and “hard” piezoelectric properties in MnO2-doped (Ba,Ca)(Zr,Sn,Ti)O3 piezoceramics via N2 annealing","authors":"Guohui Wang , Pengrong Ren , Xiangcheng Qi , Kai Li , Lang Bian , Xin Wang , Peng Zhang , Chaowei Guo , Fangping Zhuo","doi":"10.1016/j.jeurceramsoc.2025.117363","DOIUrl":"10.1016/j.jeurceramsoc.2025.117363","url":null,"abstract":"<div><div>(Ba<sub>1-x</sub>Ca<sub>x</sub>) (Zr<sub>0.04</sub>Sn<sub>0.04</sub>Ti<sub>0.92</sub>)O<sub>3</sub> (BCZST)-based piezoelectric ceramics were prepared using a solid-state reaction method. The refinement of microstructure significantly enhanced the piezoelectric properties of BCZST. BCZST doped with 2 mol% MnO<sub>2</sub> exhibited an impressive mechanical quality factor (<em>Q</em><sub>m</sub>) of approximately 1045, mainly attributed to the suppression of extrinsic domain switching contributions. However, the MnO<sub>2</sub> doping also resulted in a reduction of the piezoelectric coefficient (<em>d</em><sub>33</sub>) to 144 pC/N. Notably, annealing the BCZST + 2 mol% MnO<sub>2</sub> in nitrogen led to the coexistence of multiple phases and increased the intrinsic contribution from polarization rotation. This treatment optimized both the hard and soft piezoelectric properties, yielding a <em>Q</em><sub>m</sub> of 721 and a <em>d</em><sub>33</sub> of 220 pC/N. Our multiscale defect-engineering strategy presents a valuable approach for the design of lead-free piezoelectric ceramics with enhanced hardening effects suitable for high-power applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117363"},"PeriodicalIF":5.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611194","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}
Zhefeng Li , Yu Bai , Jiajing Hao , Hongying Dong , Ting Yang , Yuanming Gao , Wen Ma
{"title":"High-entropy (La0.2Nd0.2Y0.2Yb0.2Lu0.2)2Zr2O7 ceramic: A novel dual-phase high-entropy ceramic","authors":"Zhefeng Li , Yu Bai , Jiajing Hao , Hongying Dong , Ting Yang , Yuanming Gao , Wen Ma","doi":"10.1016/j.jeurceramsoc.2025.117361","DOIUrl":"10.1016/j.jeurceramsoc.2025.117361","url":null,"abstract":"<div><div>Thermal barrier coating (TBC) materials, used to protect high-temperature components in gas turbines, require properties such as low thermal conductivity, resistance to sintering, and high-temperature stability. In this study, a novel defect fluorite-phase high-entropy zirconate powder (La<sub>0.2</sub>Nd<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> was synthesized using solution precursor plasma spraying (SPPS), which exhibits high sphericity and uniform composition distribution. The (La<sub>0.2</sub>Nd<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> ceramic bulk was sintered from SPPS prepared powder by pressureless sintering. The phase structures, thermal and mechanical properties of the samples were investigated using various techniques. The results indicated that the (La<sub>0.2</sub>Nd<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> ceramic bulk has a defect fluorite-pyrochlore dual-phase structure and exhibits a low thermal conductivity about 1.09 W·m⁻¹ ·K⁻¹ at 1400 °C. Compared to La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> ceramic, (La<sub>0.2</sub>Nd<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> exhibits a slower grain growth rate of 3.6 × 10⁻⁴ μm/h, it also displays superior mechanical properties, including high hardness (10.03 ± 0.32 GPa) and fracture toughness K<sub>IC</sub> (1.04 ± 0.17 MPa·m¹/²). These outstanding thermal and mechanical properties make (La<sub>0.2</sub>Nd<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Lu<sub>0.2</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> a highly promising candidate for TBC applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117361"},"PeriodicalIF":5.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628314","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}
Suk-min Yoon , Babu Madavali , Chul-hee Lee , Rathinam Vasudevan , Hyoung Seop Kim , Soon-Jik Hong
{"title":"Realizing high thermoelectric performance through the synergistic control of intrinsic conduction and enhanced phonon scattering in Cu-doped Bi0.5Sb1.5Te3 alloys","authors":"Suk-min Yoon , Babu Madavali , Chul-hee Lee , Rathinam Vasudevan , Hyoung Seop Kim , Soon-Jik Hong","doi":"10.1016/j.jeurceramsoc.2025.117360","DOIUrl":"10.1016/j.jeurceramsoc.2025.117360","url":null,"abstract":"<div><div>This study explores the use of water-atomization for the mass production of (BiSb)<sub>2</sub>Te<sub>3</sub> powders (∼2Kg/min) with enhanced thermoelectric performance, aimed at large-scale commercial applications. For the first time, excess Cu (0.05 wt%) was incorporated into <em>p</em>-type Bi<sub>0.5</sub>Sb<sub>1.5</sub>Te<sub>3</sub> (BST) alloy using a novel low-impact energy (LIE) process with varying intervals. The BST powders exhibit irregular shapes and bulk crystallites with an R<span><math><mover><mrow><mn>3</mn></mrow><mo>̅</mo></mover></math></span>m rhombohedral structure. The reduction in grain size and the formation of Cu-rich regions at the BST matrix effectively enhanced the phonon scattering in LIE-Cu<sub>0.05</sub>BST alloys. Consequently, the optimized LIE 6h-Cu<sub>0.05</sub>BST exhibited a reduced lattice thermal conductivity of 0.6 W/m. K. at 400 K, along with an improved figure of merit (<em>zT</em>) of 1.2. Furthermore, the spark plasma heat treatment (SPHT) of SPHT-Cu<sub>0.05</sub>BST enhanced electrical conductivity by creating textured grain orientations raising the maximum room-temperature power factor to 4.5<span><math><mo>×</mo></math></span>10<sup>−3</sup> W/m. K<sup>2</sup>, achieving a peak <em>zT</em> of 1.29 at 400 K.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117360"},"PeriodicalIF":5.8,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637673","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}
Zunxing Chu , Chuangming Yang , Jianing Shao , Tiezhu Ma , Tian Xia , Hui Zhao , Qiang Li
{"title":"Developing extraordinary electrocatalytic performance of Fe-based cathode catalysts for solid oxide fuel cells by fluorine doping","authors":"Zunxing Chu , Chuangming Yang , Jianing Shao , Tiezhu Ma , Tian Xia , Hui Zhao , Qiang Li","doi":"10.1016/j.jeurceramsoc.2025.117357","DOIUrl":"10.1016/j.jeurceramsoc.2025.117357","url":null,"abstract":"<div><div>The development of a highly active cathode materials for solid oxide fuel cells (SOFCs) is still a major problem. Herein, we report a fluorine doped Bi<sub>0.8</sub>Ca<sub>0.2</sub>FeO<sub>2.95–<em>δ</em></sub>F<sub>0.05</sub> (BCFF) oxide as promising cathode electrocatalysts for SOFCs. The F doping strategy shows enhanced electrocatalytic activity for the oxygen reduction reaction (ORR) and CO<sub>2</sub> tolerance of the Bi<sub>0.8</sub>Ca<sub>0.2</sub>FeO<sub>3–<em>δ</em></sub> cathode. BCFF cathode possesses the excellent electrochemical performance, as evidenced by a lower polarization resistance of 0.07 Ω cm<sup>2</sup> at 700 ℃. The single cell delivers a maximum power density of 826, 978, and 1260 mW cm<sup>−2</sup> at 700, 750 and 800 ℃, respectively. This enhanced ORR activity is due to the fact that the high electronegativity of F indirectly adjusts the electron density of adjacent O atoms, enabling BCF to release more lattice oxygen and provide more oxygen vacancies. This study provides an effective strategy for the development of the cathode catalysts for SOFCs.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117357"},"PeriodicalIF":5.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592153","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}
Xunxun Hu , Yongguo Chen , Jian He , Hongbo Guo , Shengkai Gong , Huibin Xu
{"title":"YPO4: A promising environmental barrier coating candidate against corrosion of molten CMAS","authors":"Xunxun Hu , Yongguo Chen , Jian He , Hongbo Guo , Shengkai Gong , Huibin Xu","doi":"10.1016/j.jeurceramsoc.2025.117359","DOIUrl":"10.1016/j.jeurceramsoc.2025.117359","url":null,"abstract":"<div><div>Calcium-magnesium-alumina-silicate (CMAS) attack is one of the major challenges for environmental barrier coatings (EBCs) applied on the hot-sections of silicon carbide based ceramic matrix composites (CMCs) in aero-engines. YPO<sub>4</sub> is a promising EBC candidate owing to its coefficient of thermal expansion (CTE) compatibility with CMC<sub>S</sub> and superior corrosion resistance to water vapor. In this work, single phase YPO<sub>4</sub> ceramic was successfully fabricated and its corrosion-resistance to synthesized CMAS and natural volcanic ash at 1300–1400 °C was investigated. At 1300 °C, the chemical reaction between YPO<sub>4</sub> ceramics and molten CMAS accelerated, forming a continuous and dense reaction layer composed of Ca<sub>8</sub>MgY(PO<sub>4</sub>)<sub>7</sub> and Ca<sub>6</sub>MgY<sub>3</sub>(SiO<sub>4</sub>)<sub>2</sub>(PO<sub>4</sub>)<sub>5</sub> phases, thereby effectively inhibiting CMAS infiltration. With the increase in corrosion time, the reaction layer thickness follows a near-parabolic trend. At temperatures above 1300 °C, the formation of the reaction layer was constrained due to the extremely low viscosity of CMAS and its fast infiltration rate. In contrast to CMAS, volcanic ash did not react with YPO<sub>4</sub> ceramic at high temperature due to its relatively low CaO content. These findings are expected to provide comprehensive understanding on the corrosion performance and mechanism of REPO<sub>4</sub> coating materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 10","pages":"Article 117359"},"PeriodicalIF":5.8,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592154","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}