Open Ceramics最新文献

Effect of water-to-quick setting cement ratio and aggregate size on mechanical properties and dimensional accuracy of binder jetting 3D-printed bodies 水-速凝水泥比和骨料粒度对粘结剂喷射三维打印体的机械性能和尺寸精度的影响

IF 2.9

Open Ceramics Pub Date : 2024-11-13 DOI: 10.1016/j.oceram.2024.100704

Mursaleen Shahid, Vincenzo M. Sglavo

引用次数: 0

Electrochemical investigations of decorated graphite felt electrodes with Nafion/TiO2 nanoparticles for vanadium redox flow battery: Improving electro-catalytic characteristics 用于钒氧化还原液流电池的 Nafion/TiO2 纳米颗粒装饰石墨毡电极的电化学研究：改善电催化特性

IF 2.9

Open Ceramics Pub Date : 2024-11-08 DOI: 10.1016/j.oceram.2024.100703

Mahboobeh Azadi , Mohammad Zarei-Jelyani , Mohammad Mohsen Loghavi , Mohsen Babaiee , Rahim Eqra

{"title":"Electrochemical investigations of decorated graphite felt electrodes with Nafion/TiO2 nanoparticles for vanadium redox flow battery: Improving electro-catalytic characteristics","authors":"Mahboobeh Azadi , Mohammad Zarei-Jelyani , Mohammad Mohsen Loghavi , Mohsen Babaiee , Rahim Eqra","doi":"10.1016/j.oceram.2024.100703","DOIUrl":"10.1016/j.oceram.2024.100703","url":null,"abstract":"<div><div>The present study aimed to investigate the effect of Nafion/TiO<sub>2</sub> nanoparticles as an electrocatalyst on the electrochemical behavior of graphite felt (GF) electrodes in a vanadium redox flow battery. Various electrochemical tests, including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV), were conducted to assess the performance of these electrodes at different concentrations of nanoparticles (2–4 g <span>l</span><sup>-1</sup>). Additionally, X-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy were employed to analyze the chemical composition, bonding, and morphology of the decorated electrodes, respectively. The CV results revealed several effects of TiO<sub>2</sub> nanoparticles on the GF electrode, such as increased peak intensity and shifted peak sites. As the concentration of nanoparticles increased, the peak intensity rose by up to 44%. Moreover, the potentials of the decorated electrodes shifted towards the favorable side compared to the GF electrode, with changes ranging from 18 to 84%. Overall, the optimal concentration of TiO<sub>2</sub> nanoparticles (3 g <span>l</span><sup>-1</sup>) exhibited excellent electrode performance, characterized by the highest calculated diffusion coefficient, greater reversibility, enhanced electron transfer kinetics, improved stability, lower over-potential, and the lowest activation energy for redox reactions. EIS results demonstrated a significant decrease in polarization resistance (67.2–70.8%) for the decorated electrodes. Furthermore, LSV measurements indicated that the utilization of nano-electrocatalysts effectively inhibited hydrogen evolution at negative potentials.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100703"},"PeriodicalIF":2.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Comprehensive investigation into thermal stability of AB-type bio- carbonate hydroxyapatite synthesized via heat-treated bovine bone 通过热处理牛骨合成的 AB 型生物碳酸盐羟基磷灰石热稳定性的综合研究

IF 2.9

Open Ceramics Pub Date : 2024-11-07 DOI: 10.1016/j.oceram.2024.100701

Hassanen Jaber , Mohanad H. Mousa , Awais Qadir , Ján Dusza , László Tóth , Péter Pinke , Tünde Kovács

{"title":"Comprehensive investigation into thermal stability of AB-type bio- carbonate hydroxyapatite synthesized via heat-treated bovine bone","authors":"Hassanen Jaber , Mohanad H. Mousa , Awais Qadir , Ján Dusza , László Tóth , Péter Pinke , Tünde Kovács","doi":"10.1016/j.oceram.2024.100701","DOIUrl":"10.1016/j.oceram.2024.100701","url":null,"abstract":"<div><div>This study investigates the thermal stability and structural changes of AB-type carbonate-hydroxyapatite (AB-type CHA) prepared from heat-treated bovine bone occurring during calcination at 1000, 1100, 1200, and 1300 °C. The structural phase changes and morphological properties of the calcined AB-type CHA samples were assessed by SEM/EDX, XRD, FTIR, and Raman spectroscopy. The findings highlighted that the decomposition of AB-type CHA undergoes three stages: Dehydroxylation, formation of A-type carbonate-hydroxyapatite (A-type CHA), and decomposition. Pure AB-type CHA was stable in a vacuum atmosphere, and no decomposition occurred at temperatures up to 1000 °C. Dehydroxylation and formation of A-type CHA occurred at 1100 °C. The AB-type CHA partially decomposed at a temperature of 1200 °C. A-type CHA, tricalcium phosphate (α-TCP), and tetracalcium phosphate (TTCP) were the main products of the decomposition reactions, and tricalcium phosphate (β-TCP) was also detected in the system. After sintering at 1300 °C, the AB-type CHA was completely decomposed and converted into α-TCP, β-TCP, and TTCP.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100701"},"PeriodicalIF":2.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D printing of NMC-based patterned electrodes by inkjet printing 通过喷墨打印技术三维打印基于 NMC 的图案化电极

IF 2.9

Open Ceramics Pub Date : 2024-11-06 DOI: 10.1016/j.oceram.2024.100699

Kinga Sztymela , Manuella Cerbelaud , Pierre-Marie Geffroy , Yolande Murat , Marguerite Bienia , Fabrice Rossignol

引用次数: 0

Microstructures, phase and mechanical characterisation of Al2O3-ZrO2-TiO2 coating produced by atmospheric plasma spraying 大气等离子喷涂法生产的 Al2O3-ZrO2-TiO2 涂层的微结构、相和力学特性

IF 2.9

Open Ceramics Pub Date : 2024-10-21 DOI: 10.1016/j.oceram.2024.100698

Cynthia Sin Ting Chang , Marcus Wyss , Michal Andrzejewski , Geoffrey Darut , Lukas Graf , Vladimir Novak , Margie Olbinado , Susanne Erpel , Alexander Vogel , Simon Bode , Michael de Wild , Armando Salito

{"title":"Microstructures, phase and mechanical characterisation of Al2O3-ZrO2-TiO2 coating produced by atmospheric plasma spraying","authors":"Cynthia Sin Ting Chang , Marcus Wyss , Michal Andrzejewski , Geoffrey Darut , Lukas Graf , Vladimir Novak , Margie Olbinado , Susanne Erpel , Alexander Vogel , Simon Bode , Michael de Wild , Armando Salito","doi":"10.1016/j.oceram.2024.100698","DOIUrl":"10.1016/j.oceram.2024.100698","url":null,"abstract":"<div><div>The microstructure, crystallographic phases, and mechanical properties of a newly developed Al<sub>2</sub>O<sub>3</sub> – TiO<sub>2</sub> – ZrO<sub>2</sub> ternary ceramic coating were characterized. The coatings were produced by atmospheric plasma spraying as a preblended powder on Ti-6Al-4 V substrates using the new generation of the Debye-Larmor cascaded plasma torch. The 400 μm thick as-sprayed ternary ceramic coating is compact and neither delamination nor inter-/trans-granular cracks were found. The coating consists of single phase α-Al<sub>2</sub>O<sub>3</sub>, monoclinic m-ZrO<sub>2,</sub> and a nanocrystalline dual phase structure of α-Al<sub>2</sub>O<sub>3</sub> and m-ZrO<sub>2</sub>. Ti is either present as ZrTiO<sub>4</sub> or as solute in the dual phase. Cracking from the tip of the indent is rare and delamination was not observed after the progressive scratch test. The coating has potential in high wear applications for example in medical devices.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100698"},"PeriodicalIF":2.9,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Tri-axial magnetic alignment and magnetic anisotropies in misfit-layered calcium-based cobaltites doped with rare-earth ions 掺杂稀土离子的错位层状钙基钴酸盐的三轴磁力排列和磁各向异性

IF 2.9

Open Ceramics Pub Date : 2024-10-16 DOI: 10.1016/j.oceram.2024.100697

Walid Bin Ali, Shintaro Adachi, Fumiko Kimura, Shigeru Horii

引用次数: 0

Thermal properties of MB2-WC (M = Ti, Zr, Hf) and tungsten and their stability after deuterium plasma exposure MB2-WC （M = Ti、Zr、Hf）和钨的热特性及其在氘等离子体暴露后的稳定性

IF 2.9

Open Ceramics Pub Date : 2024-10-10 DOI: 10.1016/j.oceram.2024.100696

Pietro Galizia , Andrea Uccello , Francesco Ghezzi , Luca Labate , Bruno Tiribilli , Ondrej Hanzel , Martina Salvadori , Fernando Brandi , Simone Failla , Cesare Melandri , Anna Cremona , Matteo Pedroni , Marco De Angeli , Enrico Perelli Cippo , Leonida Antonio Gizzi , Peter Tatarko , Diletta Sciti

{"title":"Thermal properties of MB2-WC (M = Ti, Zr, Hf) and tungsten and their stability after deuterium plasma exposure","authors":"Pietro Galizia , Andrea Uccello , Francesco Ghezzi , Luca Labate , Bruno Tiribilli , Ondrej Hanzel , Martina Salvadori , Fernando Brandi , Simone Failla , Cesare Melandri , Anna Cremona , Matteo Pedroni , Marco De Angeli , Enrico Perelli Cippo , Leonida Antonio Gizzi , Peter Tatarko , Diletta Sciti","doi":"10.1016/j.oceram.2024.100696","DOIUrl":"10.1016/j.oceram.2024.100696","url":null,"abstract":"<div><div>The thermal properties of ultra-high temperature ceramics (UHTCs) in the MB<sub>2</sub>-WC (M = Ti, Zr, Hf) system and tungsten were studied for potential application as plasma-facing materials in fusion power plants. The sintered UHTC and tungsten samples were subjected to deuterium plasma or protons irradiation. Thermal diffusivity was measured using the laser flash method, and superficial thermal conductivity was analyzed through atomic force microscopy. Results showed that the thermal properties did not degrade when exposed to relevant environments and remained stable over a range of temperatures, unlike the reference tungsten material. Thermal conductivity ranged from 61 to 68 W m<sup>−1</sup> K<sup>−1</sup> for TiB<sub>2</sub>-2(WC-6Co), from 53 to 63 W m<sup>−1</sup> K<sup>−1</sup> for ZrB<sub>2</sub>-6WC, from 67 to 75 W m<sup>−1</sup> K<sup>−1</sup> for HfB<sub>2</sub>-6WC, and from 180 to 119 W m<sup>−1</sup> K<sup>−1</sup> for tungsten across the temperature range from room temperature to 1200 °C. The increasing trend of thermal effusivity, over 19000 J s<sup>−0.5</sup> m<sup>−2</sup> K<sup>−1</sup> at 1200 °C, justifies further testing and of UHTC materials for fusion applications.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100696"},"PeriodicalIF":2.9,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Specifics of Al substitution into boron carbide: A DFT study 铝取代碳化硼的特异性：DFT 研究

IF 2.9

Open Ceramics Pub Date : 2024-10-10 DOI: 10.1016/j.oceram.2024.100695

Oleksandr Vasiliev, Vladyslav Bilyi

引用次数: 0

Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings 通过喷雾干燥法制备用于热障涂层的含有 YSZ 晶须的钇稳定氧化锆和硫酸镧颗粒

IF 2.9

Open Ceramics Pub Date : 2024-10-09 DOI: 10.1016/j.oceram.2024.100694

Milan Parchovianský , Monika Michálková , Ivana Parchovianská , Beáta Pecušová , Dušan Galusek , Amirhossein Pakseresht

{"title":"Yttria-stabilised zirconia and lanthanum cerate granules with YSZ whiskers prepared by spray drying for thermal barrier coatings","authors":"Milan Parchovianský , Monika Michálková , Ivana Parchovianská , Beáta Pecušová , Dušan Galusek , Amirhossein Pakseresht","doi":"10.1016/j.oceram.2024.100694","DOIUrl":"10.1016/j.oceram.2024.100694","url":null,"abstract":"<div><div>The aim of this study was to explore the effect of different solid phases and varied amounts of polyvinyl alcohol (PVA) on granule size of plasma-sprayable yttria-stabilised zirconia (YSZ) with YSZ whiskers (YSZ/W) and lanthanum cerate (La<sub>2</sub>Ce<sub>2</sub>O<sub>7</sub>, LC) with YSZ whiskers (LC/W) as composite powders. The initial phase of this study involved the preparation and optimization of a YSZ suspension using varying solid loadings of YSZ powder (ranging from 30 to 75 wt%) and PVA serving as both a binder and dispersant. The suspension was subjected to rigorous optimization procedures to meet the required standards. The suspensions were spray dried, and the resulting granulates were examined using SEM to determine their shape and size. The particle size of YSZ granules increased with increasing solid loading of YSZ in the suspension. The optimum amount of dispersant was found to be 1 wt% related to the weight of solid, while the solid loading was 75 wt% of YSZ. In some cases, excessive YSZ solid loading and dispersant impaired the formation of spherical granules. Composite YSZ/W and LC/W granules were also prepared with spherical, lemon, or irregular shapes, with the whiskers embedded in the YSZ or LC powder.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100694"},"PeriodicalIF":2.9,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Improved mechanical and tribological properties of (TiZrHfNbTa)C with the addition of silicon carbide whiskers 添加碳化硅晶须后 (TiZrHfNbTa)C 的机械和摩擦学特性得到改善

IF 2.9

Open Ceramics Pub Date : 2024-10-05 DOI: 10.1016/j.oceram.2024.100693

Lenka Ďaková , Alexandra Kovalčíková , Monika Hrubovčáková , Jana Andrejovská , František Kromka , Ján Dusza

{"title":"Improved mechanical and tribological properties of (TiZrHfNbTa)C with the addition of silicon carbide whiskers","authors":"Lenka Ďaková , Alexandra Kovalčíková , Monika Hrubovčáková , Jana Andrejovská , František Kromka , Ján Dusza","doi":"10.1016/j.oceram.2024.100693","DOIUrl":"10.1016/j.oceram.2024.100693","url":null,"abstract":"<div><div>Dense (Ti<sub>0.2</sub>Zr<sub>0.2</sub>Hf<sub>0.2</sub>Nb<sub>0.2</sub>Ta<sub>0.2</sub>)C with up to 10 wt % SiC whisker were prepared by spark plasma sintering. The influence of SiC<sub>w</sub> on the microstructure development, mechanical and tribological properties has been investigated. Nanohardness of HEC and SiC<sub>w</sub> phases varied between 38 GPa and 40 GPa, and indentation modulus of elasticity was ∼605 GPa. The hardness of the composites increased from 22 GPa to 27 GPa and indentation fracture resistance from 3.55 MPa m<sup>1/2</sup> to 4.59 MPa m<sup>1/2</sup> with increasing SiC<sub>w</sub> content. The main toughening mechanisms were crack deflection, crack branching, and crack bridging. The system HEC +5 wt% of SiC<sub>w</sub> was found to possess the highest bending strength of 623 ± 25 MPa. The composites exhibited similar coefficients of frictions with around 0.3 and wear rates approximately 1.50 × 10<sup>−6</sup> mm<sup>3</sup>/N⋅m at 5 N and 2.66 × 10<sup>−6</sup> mm<sup>3</sup>/N⋅m at 25 N with positive influence of SiC phase on the wear mechanisms.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100693"},"PeriodicalIF":2.9,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0