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Pore structure and mechanical property of open-cell Al2O3 porous ceramic derived from boehmite 薄水铝石制备的开孔Al2O3多孔陶瓷的孔隙结构和力学性能
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-24 DOI: 10.1016/j.ceramint.2026.07.446
An Huang, Xiulan He, Rui Gao, Ling Li
{"title":"Pore structure and mechanical property of open-cell Al2O3 porous ceramic derived from boehmite","authors":"An Huang,&nbsp;Xiulan He,&nbsp;Rui Gao,&nbsp;Ling Li","doi":"10.1016/j.ceramint.2026.07.446","DOIUrl":"10.1016/j.ceramint.2026.07.446","url":null,"abstract":"<div><div>Open-cell Al<sub>2</sub>O<sub>3</sub> porous ceramics were prepared via particle-stabilized foam method with nano boehmite as raw material using sodium lauryl sulfate as surfactant and glycerol as organic solvent. Glycerol not only regulates viscosity of slurry and stabilizes foam but also reduces the drying rate and constructs pores. Suitable sodium lauryl sulfate content can play a role of hydrophobic modification and stabilizing the foam slurry. The formation of through-pores distributed in the spherical pores is caused by the volume contraction resulting from the phase transformation of boehmite. The porous ceramics present high shrinkage rate (48.9 %∼64.79 %<em>)</em> and low bulk density (0.29 g cm<sup>−3</sup>∼0.68 g cm<sup>−3</sup>) owing to the phase transformation of boehmite. The compressive strength is within the range of 0.79 MPa to 9.67 MPa, and the apparent porosity is between 70.28 % and 94.31 %. The highly interconnected open-cell structure of porous ceramic can be easily adjusted through optimizing solid content, surfactant, organic solvent, and sintering temperature.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45692-45706"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174995","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
Antiferroelectric thin films with robust triple-hysteresis switching by high-throughput composition screening 高通量成分筛选具有鲁棒三迟滞开关的反铁电薄膜
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-24 DOI: 10.1016/j.ceramint.2026.07.460
Peipei Su, Liyufen Dai, Jinbin Wang, Yongshuai Ge, Xiangli Zhong, Gaokuo Zhong
{"title":"Antiferroelectric thin films with robust triple-hysteresis switching by high-throughput composition screening","authors":"Peipei Su,&nbsp;Liyufen Dai,&nbsp;Jinbin Wang,&nbsp;Yongshuai Ge,&nbsp;Xiangli Zhong,&nbsp;Gaokuo Zhong","doi":"10.1016/j.ceramint.2026.07.460","DOIUrl":"10.1016/j.ceramint.2026.07.460","url":null,"abstract":"<div><div>The coexistence of antiferroelectric and ferroelectric phases in thin films offers a rich landscape of intricate polarization configurations, promising access to novel physical phenomena and emerging functionalities. However, realizing robust antiferroelectric-ferroelectric (AFE-FE) coexistence remains challenging due to the incompatibility of their polarization states. Here we show that PbZrO<sub>3</sub> thin films exhibited AFE-FE coexistence with characteristic triple-hysteresis behavior when deposition temperature was optimized, and the AFE-FE coexistence likely originated from partial A-site ions substitution at B-sites. Furthermore, to systematically explore and achieve robust triple-hysteresis switching, we developed a high-throughput composition screening strategy to precisely control A-site and B-site doping in PbZrO<sub>3</sub> thin films. High-throughput property mapping revealed that triple-hysteresis switching could be precisely tuned by both A-site and B-site doping. Integrating temperature-dependent measurements, we identified a composition with 3 % Sn<sup>4+</sup> substitution at the B-site that displayed robust triple-hysteresis switching across a broad temperature range, near-ideal antiferroelectric behavior at 225 °C, together with stable high-temperature antiferroelectricity. Our findings offer a design approach for robust triple-hysteresis switching and provide a material platform for developing novel AFE-FE functional electronics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45867-45875"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149174999","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
Surfactant-directed synthesis of hierarchical FeMnO3/PANI nanostructures for advanced supercapacitors 表面活性剂定向合成先进超级电容器用多层FeMnO3/PANI纳米结构
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-25 DOI: 10.1016/j.ceramint.2026.07.462
Yasmeen Iqbal, Ali Alamry, Hala M. Abo-Dief, Eman Alzahrani
{"title":"Surfactant-directed synthesis of hierarchical FeMnO3/PANI nanostructures for advanced supercapacitors","authors":"Yasmeen Iqbal,&nbsp;Ali Alamry,&nbsp;Hala M. Abo-Dief,&nbsp;Eman Alzahrani","doi":"10.1016/j.ceramint.2026.07.462","DOIUrl":"10.1016/j.ceramint.2026.07.462","url":null,"abstract":"<div><div>To resolve the global energy issues, development of long-lasting energy storage solutions is imperative. Supercapacitors (SCs) are widely used as the energy storage devices due to charging and discharging rates and cyclic stability. In this study, FeMnO<sub>3</sub>/PANI was synthesized via a cetyltrimethylammonium bromide (CTAB) assisted route for SCs applications. The introduction of structure-directing CTAB controls the growth of FeMnO<sub>3</sub> nanostructures and ensures uniform dispersion of PANI. The resulting composite demonstrates high surface area (SA = 118 m<sup>2</sup>/g), which facilitates rapid electrolyte ion migration and efficient charge transport. In comparison FeMnO<sub>3</sub>/PANI synthesized without CTAB delivered SA of 96.19 m<sup>2</sup>/g. Additionally, electrochemical characteristics of electrode demonstrated specific capacitance (C<sub>s</sub>) of 1138 F/g, an energy density (E<sub>d</sub>) of 23 Wh/kg with P<sub>d</sub> of 192 W/kg at current density (j) of 1 A/g. In contrast, FeMnO<sub>3</sub>/PANI electrode synthesized without CTAB delivered a lower C<sub>s</sub> of 989 F/g, E<sub>d</sub> of 19 Wh/kg and P<sub>d</sub> of 158 W/kg. Additionally, the impedance analysis of CTAB-assisted FeMnO<sub>3</sub>/PANI (C-FeMnO<sub>3</sub>/PANI) indicated a small semi-circle, demonstrating negligible charge transfer resistance (R<sub>ct</sub> = 0.37 Ω) and series resistance (R<sub>s</sub>) 1.48 Ω. Moreover, the prolonged electrochemical stability of the C-FeMnO<sub>3</sub>/PANI electrode was assessed throughout 2000 CV cycles and 50 h of chronoamperometric testing. Overall, these results indicate that synthesized perovskite with PANI nanoparticles could be a potential electrode material for next-generation SCs.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 25","pages":"Pages 45884-45894"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149175002","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
Bi3+/Mn4+ co-doping double perovskite phosphors with tunable emission for multifunctional applications Bi3+/Mn4+共掺杂双钙钛矿荧光粉的可调谐发射
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-17 DOI: 10.1016/j.ceramint.2026.07.264
Hai Wu, Lingxiu Zhang, Yingfang Li, Haixi Huang, Weichu Liang, Chaoyong Deng, Weichao Huang, Junli Ma
{"title":"Bi3+/Mn4+ co-doping double perovskite phosphors with tunable emission for multifunctional applications","authors":"Hai Wu,&nbsp;Lingxiu Zhang,&nbsp;Yingfang Li,&nbsp;Haixi Huang,&nbsp;Weichu Liang,&nbsp;Chaoyong Deng,&nbsp;Weichao Huang,&nbsp;Junli Ma","doi":"10.1016/j.ceramint.2026.07.264","DOIUrl":"10.1016/j.ceramint.2026.07.264","url":null,"abstract":"<div><div>The development of multifunctional phosphors with optical temperature sensing and advanced anti-counterfeiting is of great significance but remains considerable challenges. Herein, a series of Bi<sup>3+</sup>/Mn<sup>4+</sup> co-doped La<sub>2</sub>CaSnO<sub>6</sub> phosphors with double perovskite structure were successfully synthesized, and their luminescence properties and temperature sensing properties were investigated in detail. The tunable luminescence of the phosphors were achieved by adjusting doping concentration, excitation wavelength and ambient temperature. Based on the multi-mode tunable luminescence of La<sub>2</sub>CaSnO<sub>6</sub>: Bi<sup>3+</sup>, Mn<sup>4+</sup> phosphors, the potential applications in the anti-counterfeiting field have been demonstrated by constructing complex patterns. Moreover, benefiting from the distinct thermal behaviors of Bi<sup>3+</sup> and Mn<sup>4+</sup> ions, the La<sub>2</sub>CaSnO<sub>6</sub>: Bi<sup>3+</sup>, Mn<sup>4+</sup> showed good optical temperature sensing performance, achieving a maximum relative sensitivity (<em>S</em><sub><em>r</em></sub>) of 3.34% K<sup>−1</sup> at 323 K. These results indicate that La<sub>2</sub>CaSnO<sub>6</sub>: Bi<sup>3+</sup>, Mn<sup>4+</sup> phosphors are promising multifunctional materials for applications in optical temperature sensing and anti-counterfeiting.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 43747-43755"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071192","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
Laser-directed energy deposition of crack-free WC/FeCoNiCrMn gradient coatings with superior wear resistance 具有优异耐磨性的无裂纹WC/FeCoNiCrMn梯度涂层的激光定向能沉积
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-14 DOI: 10.1016/j.ceramint.2026.07.234
Zhiyuan Liu, Yongcun Li, Yong Wang
{"title":"Laser-directed energy deposition of crack-free WC/FeCoNiCrMn gradient coatings with superior wear resistance","authors":"Zhiyuan Liu,&nbsp;Yongcun Li,&nbsp;Yong Wang","doi":"10.1016/j.ceramint.2026.07.234","DOIUrl":"10.1016/j.ceramint.2026.07.234","url":null,"abstract":"<div><div>Laser-directed energy deposition (L-DED) successfully fabricated crack-free WC/FeCoNiCrMn high-entropy alloy (HEA) gradient coatings, thereby overcoming the critical cracking issue in coatings with high WC content. Innovatively leveraging the layer-by-layer controllability of laser additive manufacturing, two types of functionally graded materials-continuous gradient and sandwich structures-were designed. Systematic characterization shows that precise spatial regulation of WC distribution during laser processing mitigates thermal stress concentration from abrupt compositional changes, completely suppressing cracking. Microstructural analysis uncovered unique evolutions under the extreme non-equilibrium solidification conditions of laser processing: the gradient structures not only guided the directional precipitation of carbides (hypoeutectic, eutectic, dendritic, block) but also promoted significant grain refinement (achieving up to 55% refinement in the continuous gradient coating). Performance tests demonstrated that, owing to the compositional and structural gradients realized via laser manufacturing, the coatings exhibited ideal hardness transitions (continuously increasing or wave-like upward trends) and excellent wear resistance. Notably, the continuous gradient coating showed a wear rate at room temperature that was only 3% of that of the base HEA coating. This study provides important theoretical and practical foundations for laser-based advanced coating design and high-performance surface engineering.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 43492-43508"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071480","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
SmFeO3/Bi2WO6 composite materials with hierarchical structures of nanorods and nanoflowers for butanol detection 具有纳米棒和纳米花结构的SmFeO3/Bi2WO6复合材料用于丁醇检测
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-15 DOI: 10.1016/j.ceramint.2026.07.207
Yi-Cheng Geng, Xiang-Bing Li, Bao-Xu Wu, Qian-Qian Zhang, Ling-Yan Qiao, Zhou-Ke Huang, Shi-Jie Lu, Le-He Zheng
{"title":"SmFeO3/Bi2WO6 composite materials with hierarchical structures of nanorods and nanoflowers for butanol detection","authors":"Yi-Cheng Geng,&nbsp;Xiang-Bing Li,&nbsp;Bao-Xu Wu,&nbsp;Qian-Qian Zhang,&nbsp;Ling-Yan Qiao,&nbsp;Zhou-Ke Huang,&nbsp;Shi-Jie Lu,&nbsp;Le-He Zheng","doi":"10.1016/j.ceramint.2026.07.207","DOIUrl":"10.1016/j.ceramint.2026.07.207","url":null,"abstract":"<div><div>In this work, SmFeO<sub>3</sub> nanorods were prepared via a hydrothermal synthesis route, and a heterostructure was subsequently constructed via a secondary hydrothermal process, resulting in the successful preparation of SmFeO<sub>3</sub>/Bi<sub>2</sub>WO<sub>6</sub> nanocomposites with a unique flower-rod-like morphology. The successful formation of the SmFeO<sub>3</sub>/Bi<sub>2</sub>WO<sub>6</sub> composite was confirmed using various characterization techniques. SEM observations revealed that the composite consists of Bi<sub>2</sub>WO<sub>6</sub> nanoflowers and SmFeO<sub>3</sub> nanorods grown on their surfaces. The gas-sensing performance test results demonstrated that the SmFeO<sub>3</sub>/Bi<sub>2</sub>WO<sub>6</sub> nanocomposite exhibits significantly enhanced gas-sensing properties. Compared with pristine Bi<sub>2</sub>WO<sub>6</sub>, the SmFeO<sub>3</sub>/Bi<sub>2</sub>WO<sub>6</sub> nanocomposite has an optimal operating temperature that is 30°C lower and a response value that is four times higher; compared to pure SmFeO<sub>3</sub>, its optimal operating temperature is 100°C lower, and its response value is also slightly higher. The mechanism behind the performance enhancement can be attributed to the combination of the advantages of both materials, resulting in a microstructure characterized by a rough surface and a large specific surface area. At the same time, the successful formation of the heterojunction has effectively improved electron transport efficiency. This study provides important insights into the application of perovskite composites for enhancing gas-sensing performance.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 43199-43210"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071548","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
From fine particles to performance: Axial suspension plasma spraying of mixed ceramic systems 从细颗粒到性能:混合陶瓷系统的轴向悬浮等离子喷涂
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-13 DOI: 10.1016/j.ceramint.2026.07.200
Swarna Madugula, Sivakumar Govindarajan, Nicholas Curry, Stefan Björklund, Shrikant Joshi
{"title":"From fine particles to performance: Axial suspension plasma spraying of mixed ceramic systems","authors":"Swarna Madugula,&nbsp;Sivakumar Govindarajan,&nbsp;Nicholas Curry,&nbsp;Stefan Björklund,&nbsp;Shrikant Joshi","doi":"10.1016/j.ceramint.2026.07.200","DOIUrl":"10.1016/j.ceramint.2026.07.200","url":null,"abstract":"<div><div>The use of liquid feedstock in thermal spray technologies has advanced significantly, enabling exploration of diverse application areas, including tribological coatings, through the fabrication of layers with tailored properties distinct from those achieved with a conventional powder-based approach. Suspension Plasma Spraying (SPS) has garnered significant attention due to its ability to process sub-micron-sized powders dispersed in a suitable liquid medium, thereby overcoming feeding problems associated with such fine particle sizes. In the present study, an axial injection SPS system was employed to fabricate novel composite coatings involving a ternary system comprising TiO<sub>x</sub>, TiN, and TiC (termed hereafter as ‘3T’), and further extending to a quaternary system through the addition of hexagonal boron nitride (hBN) as a solid lubricant (termed hereafter as ‘3T-hBN’). The coatings were thoroughly characterized using FE-SEM, XRD, EDS, XPS, nanoindentation, fracture toughness and Raman spectroscopy to assess microstructure, phase composition, and mechanical properties. Tribological performance was evaluated under dry sliding conditions using a ball-on-disc tribometer. The incorporation of the solid lubricant hBN into the 3T-hBN coating significantly reduced the coefficient of friction (CoF) and markedly enhanced wear resistance compared to the 3T coatings. Under higher normal load conditions, the 3T-hBN coating exhibited a 93% reduction in wear rate compared to the 3T coating. These results demonstrate that the composite suspension approach enables the fabrication of coatings with refined microstructures, allowing for the realization of distinct tribological functionalities, such as reduced friction and improved wear resistance, within a single coating architecture.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 43087-43100"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071662","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
SrAl2O4:Eu2+, Dy3+-embedded flexible composite films for mechanical applications 机械用SrAl2O4:Eu2+, Dy3+嵌入式柔性复合薄膜
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-23 DOI: 10.1016/j.ceramint.2026.07.191
Moses Kingsford Flomo, Xiaotong Shen, Lumen Chao, Verma Sherman, Quansheng Liu
{"title":"SrAl2O4:Eu2+, Dy3+-embedded flexible composite films for mechanical applications","authors":"Moses Kingsford Flomo,&nbsp;Xiaotong Shen,&nbsp;Lumen Chao,&nbsp;Verma Sherman,&nbsp;Quansheng Liu","doi":"10.1016/j.ceramint.2026.07.191","DOIUrl":"10.1016/j.ceramint.2026.07.191","url":null,"abstract":"<div><div>Long-afterglow SrAl<sub>2</sub>O<sub>4</sub><sup>2+</sup>, Dy<sup>3+</sup> (SAO) phosphors have attracted considerable interest for flexible photonic and mechanical applications. However, their high sensitivity to moisture limits practical use, and integrating them into polymer matrices without compromising luminescent and mechanical performance remains a significant challenge. In this work, Sr<sub>0</sub>.<sub>94</sub>Al<sub>2</sub>O<sub>4</sub>:0.02Eu<sup>2+</sup>,0.04Dy<sup>3+</sup> phosphors were synthesized by a conventional solid-state reaction using B<sub>2</sub>O<sub>3</sub> flux (0–20 mol%) at 1300 °C, with optimum luminescence achieved at 10 mol% B<sub>2</sub>O<sub>3</sub> after 5h of sintering. The optimized phosphor (B10/5) was incorporated into thermoset polyurethane (PU) and polydimethylsiloxane (PDMS) matrices to fabricate flexible composite films, enabling a systematic comparison of the influence of polymer chemistry on mechanical, optical, and environmental properties. PU-based composites exhibited exceptional elasticity and strength, achieving ∼2096% elongation at break and ∼19 MPa tensile strength at a 16:5 wt ratio, whereas PDMS-based composites provided a balanced combination of flexibility and durability with ∼1300% elongation and ∼10 MPa tensile strength at an 8:7 wt ratio. Structural and functional characterization by XRD, SEM, FTIR, photoluminescence spectroscopy, water-angle, and tensile testing demonstrates that the polymer matrices critically influence the composite's performance. After 30 days of water immersion, PDMS composites retained nearly 99% of the initial luminescence with negligible mechanical degradation, whereas PU composites retained ∼65% of their luminescence and exhibited a ∼25% reduction in tensile strength due to moisture-induced plasticization. These findings establish direct relationships between polymer chemistry, luminescence stability, and mechanical durability, providing a promising strategy for flexible sensors, smart coatings, wearable photonic systems, and durable optoelectronic devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 42985-42998"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071717","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
Regulating the biodegradation kinetics of Mg–Ca alloys via Mg2Ca phase control for biomedical applications 通过Mg2Ca相调控生物医学用Mg-Ca合金的生物降解动力学
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-12 DOI: 10.1016/j.ceramint.2026.07.185
Rawad Yaqoub Aljabr, P.S.C. Bose
{"title":"Regulating the biodegradation kinetics of Mg–Ca alloys via Mg2Ca phase control for biomedical applications","authors":"Rawad Yaqoub Aljabr,&nbsp;P.S.C. Bose","doi":"10.1016/j.ceramint.2026.07.185","DOIUrl":"10.1016/j.ceramint.2026.07.185","url":null,"abstract":"<div><div>In this study, Ca nanoparticles (Ca<sub>nps</sub>) were employed as alloying additions to fabricate Mg–Ca alloys by powder metallurgy, aiming to systematically investigate the influence of Ca particle size and content on Mg<sub>2</sub>Ca phase evolution and the resulting biodegradation behavior. Pure Mg and Mg–Ca<sub>n</sub> alloys containing 0.5–3 wt.% Ca nanoparticles were investigated, while corresponding Mg–0.5Ca<sub>m</sub> and Mg–1Ca<sub>m</sub> alloys fabricated using microscale Ca powder were included for direct comparison. XRD analysis confirmed a progressive increase in the Mg<sub>2</sub>Ca phase fraction with increasing Ca content, whereas SEM/FESEM observations revealed a finer and more homogeneous distribution of Ca-containing interfacial regions in the nanoparticle-containing alloys compared with the corresponding micro-Ca alloys. Electrochemical impedance spectroscopy, potentiodynamic polarization, and 14-day immersion tests consistently identified Mg–1Ca<sub>n</sub> as the optimum composition, exhibiting the highest polarization resistance (445.66 Ω cm<sup>2</sup>), the lowest corrosion current density (0.055 mA cm<sup>−2</sup>), and the lowest degradation rate (2.00 mm year<sup>−1</sup>), compared with Mg–1Ca<sub>m</sub> (194.21 Ω cm<sup>2</sup>, 0.211 mA cm<sup>−2</sup> and 4.88 mm year<sup>−1</sup>) and Mg–3Ca<sub>n</sub> (188.95 Ω cm<sup>2</sup>, 0.232 mA cm<sup>−2</sup> and 5.10 mm year<sup>−1</sup>). Post-immersion characterization confirmed enhanced Ca–P deposition on the Mg–1Ca<sub>n</sub> surface, indicating the formation of a more chemically mature corrosion layer. Overall, the results demonstrate that controlling the evolution and spatial distribution of the Mg<sub>2</sub>Ca phase through nanoparticle-assisted alloying, rather than simply increasing the Ca content, is the key factor governing the biodegradation behavior of PM Mg–Ca alloys and provides an effective strategy for improving the corrosion resistance and bioactivity of biodegradable Mg alloys.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 24","pages":"Pages 42897-42916"},"PeriodicalIF":6.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149071779","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
Crystal structure, dielectric properties and applications of low-permittivity CoNi(PO3)4-based microwave dielectric ceramics 低介电常数CoNi(PO3)4基微波介电陶瓷的晶体结构、介电性能及应用
IF 6 2区 材料科学
Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-17 DOI: 10.1016/j.ceramint.2026.07.193
Xiaohan Zhang, Xinwei Liu, Xiangyu Xu, Haitao Wu, Lianwei Shan, Zhanbai Feng, Guangbin Duan
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