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Using percolation to design ZnO composites with hBN modified grain boundaries to obtain varistor-like behavior 利用渗滤技术设计具有氢化萘修饰晶界的氧化锌复合材料，以获得类似压敏电阻的性能
IF 2.9
Open Ceramics Pub Date : 2024-11-14 DOI: 10.1016/j.oceram.2024.100707
Michael W. Mervosh , Sevag Momjian , Javier Mena-Garcia , Clive A. Randall
{"title":"Using percolation to design ZnO composites with hBN modified grain boundaries to obtain varistor-like behavior","authors":"Michael W. Mervosh ,&nbsp;Sevag Momjian ,&nbsp;Javier Mena-Garcia ,&nbsp;Clive A. Randall","doi":"10.1016/j.oceram.2024.100707","DOIUrl":"10.1016/j.oceram.2024.100707","url":null,"abstract":"<div><div>Conventional varistors rely on the formation of a Double Schottky Barrier within the intergranular region of ZnO via acceptor doping and a Bi<sub>2</sub>O<sub>3</sub> phase. This work has been able to yield varistor-like behavior via cold sintered ZnO composites by placing 2D hBN flakes on the grain boundaries within the ZnO matrix. Above the percolation threshold, a network of resistive hBN barriers is formed which prevents current from flowing through the more conductive ZnO. However, at a given voltage, electrons can tunnel through the hBN if the layers are kept thin enough. Within this narrow band of hBN content, samples have been fabricated with α values as high as 9.5. The composite system demonstrated Schottky conduction at low fields before switching to Fowler-Nordheim tunneling at high fields. This microstructural design was able to show greater nonlinearity compared to previous attempts at creating varistor materials through the unique cold sintering process (CSP).</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100707"},"PeriodicalIF":2.9,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702157","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
Critical strain as a metric for crack propagation resistance in SiCf/SiC composites 临界应变作为 SiCf/SiC 复合材料抗裂纹扩展的指标
IF 2.9
Open Ceramics Pub Date : 2024-11-13 DOI: 10.1016/j.oceram.2024.100702
Jinping Cui, Kang Guan, Pinggen Rao
{"title":"Critical strain as a metric for crack propagation resistance in SiCf/SiC composites","authors":"Jinping Cui,&nbsp;Kang Guan,&nbsp;Pinggen Rao","doi":"10.1016/j.oceram.2024.100702","DOIUrl":"10.1016/j.oceram.2024.100702","url":null,"abstract":"<div><div>Comprehensive research on crack propagation in SiC<sub>f</sub>/SiC composites is essential for understanding fracture mechanisms, enhancing toughening capabilities, extending service life in engineering applications, and driving new methodologies and theories in strength design. Despite their importance, the defect sensitivity and crack propagation resistance (CPR) of SiC<sub>f</sub>/SiC composites remain underexplored, with the influence of component parameters on CPR still unclear. Herein, we develop a novel approach and propose a new three-dimensional finite element model that incorporates varying interface layer thicknesses and randomly distributed fibers, using the single-edged pre-crack beam method. By introducing the critical strain parameter, the model quantitatively evaluates fracture energy and the effects of mesoscopic components on CPR. Our findings provide valuable insights into optimizing the mesoscopic components for enhanced toughness in SiC<sub>f</sub>/SiC composites.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100702"},"PeriodicalIF":2.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702156","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
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
{"title":"Effect of water-to-quick setting cement ratio and aggregate size on mechanical properties and dimensional accuracy of binder jetting 3D-printed bodies","authors":"Mursaleen Shahid,&nbsp;Vincenzo M. Sglavo","doi":"10.1016/j.oceram.2024.100704","DOIUrl":"10.1016/j.oceram.2024.100704","url":null,"abstract":"<div><div>Quick setting cement-based materials were produced in the present work using the binder jetting 3D printing (BJ3DP) technique with the aim at investigating how processing parameters like water-to-cement ratio and aggregate size affect the final properties of the products. Commercially available quick-setting cement and siliceous sand were utilized. Dimensional accuracy, compressive and flexural strength were measured for variable processing conditions and their individual effect was analysed. The results showed that the properties of printed parts are significantly influenced by the considered processing variables and, in particular, a larger water-to-cement ratio has a beneficial effect on the mechanical performances, the improvement being higher when coarser siliceous sand is used. It was also shown that the employment of finer sand results in more limited dimensional accuracy.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100704"},"PeriodicalIF":2.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657431","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
Metal organic frameworks derived core-shell structured C@TiC nanocomposites with excellent microwave absorption performance 具有优异微波吸收性能的金属有机框架衍生核壳结构 C@TiC 纳米复合材料
IF 2.9
Open Ceramics Pub Date : 2024-11-08 DOI: 10.1016/j.oceram.2024.100700
Yan Wang , Zhihe Xiao , Jian Gu , Weibin Sun , Junyang Jin , Xin Sun
{"title":"Metal organic frameworks derived core-shell structured C@TiC nanocomposites with excellent microwave absorption performance","authors":"Yan Wang ,&nbsp;Zhihe Xiao ,&nbsp;Jian Gu ,&nbsp;Weibin Sun ,&nbsp;Junyang Jin ,&nbsp;Xin Sun","doi":"10.1016/j.oceram.2024.100700","DOIUrl":"10.1016/j.oceram.2024.100700","url":null,"abstract":"<div><div>With aim to prepare nano-microwave absorption material with excellent microwave absorption performance, core-shell structured C@TiC nanocomposites with tunable nanostructures and morphologies were successfully synthesized through one-step pyrolysis of the Ti-based MOFs precursors at a low temperature. Effects of various metal/linker ratio, solvent types and Hacac addition on the microstructures and properties of the C@TiC nanocomposites were thoroughly investigated, demonstrating that the TiC core-C shell structure could be effectively tailored. Compared to pure TiC nanoparticles, the C@TiC nanocomposites exhibited significantly improved microwave absorption performance, including the stronger <em>RL</em> peak of -35.64 dB (10.72 GHz) at 2.4 mm thicknesses and the enhanced effective microwave wave absorption width (EAB, <em>RL</em>≤-10 dB) spanning the entire C-band and X-band, which is ascribed to the better impedance matching and richer microwave loss mechanisms. As a result, C@TiC nanocomposites show great potential to be applied as absorbers with strong microwave absorption and wide absorption bandwidth.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100700"},"PeriodicalIF":2.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702158","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
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 ,&nbsp;Mohammad Zarei-Jelyani ,&nbsp;Mohammad Mohsen Loghavi ,&nbsp;Mohsen Babaiee ,&nbsp;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}
引用次数: 0
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 ,&nbsp;Mohanad H. Mousa ,&nbsp;Awais Qadir ,&nbsp;Ján Dusza ,&nbsp;László Tóth ,&nbsp;Péter Pinke ,&nbsp;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
{"title":"3D printing of NMC-based patterned electrodes by inkjet printing","authors":"Kinga Sztymela ,&nbsp;Manuella Cerbelaud ,&nbsp;Pierre-Marie Geffroy ,&nbsp;Yolande Murat ,&nbsp;Marguerite Bienia ,&nbsp;Fabrice Rossignol","doi":"10.1016/j.oceram.2024.100699","DOIUrl":"10.1016/j.oceram.2024.100699","url":null,"abstract":"<div><div>One interesting way of enhancing the properties of lithium-ion batteries is to produce electrodes with a 3D design. The aim of the 3D design is to allow the electrolyte to penetrate through the electrode volume, increasing the surface-to-volume ratio and reducing ion diffusion paths. To achieve these designs, additive shaping processes are promising. In this article, we analyze the possibility of printing 3D structured electrodes using inkjet printing. The study focuses on Nickel Cobalt Manganese (NMC) based electrodes, commonly used as cathode materials. The importance of initial powder size and formulation will be discussed in terms of printability. Finally, we show that it is possible to print 3D structures using NMC inks. Improvements need to be made to ensure greater printing stability.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100699"},"PeriodicalIF":2.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657433","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
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 ,&nbsp;Marcus Wyss ,&nbsp;Michal Andrzejewski ,&nbsp;Geoffrey Darut ,&nbsp;Lukas Graf ,&nbsp;Vladimir Novak ,&nbsp;Margie Olbinado ,&nbsp;Susanne Erpel ,&nbsp;Alexander Vogel ,&nbsp;Simon Bode ,&nbsp;Michael de Wild ,&nbsp;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}
引用次数: 0
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
{"title":"Tri-axial magnetic alignment and magnetic anisotropies in misfit-layered calcium-based cobaltites doped with rare-earth ions","authors":"Walid Bin Ali,&nbsp;Shintaro Adachi,&nbsp;Fumiko Kimura,&nbsp;Shigeru Horii","doi":"10.1016/j.oceram.2024.100697","DOIUrl":"10.1016/j.oceram.2024.100697","url":null,"abstract":"<div><div>In this study, we introduce an original method for quantifying tri-axial magnetic anisotropy in [Ca<sub>2</sub>CoO<sub>3-δ</sub>]<sub>0.62</sub>CoO<sub>2</sub>, and its rare earth (RE)-doped variants, [(Ca<sub>1-<em>x</em></sub>RE<sub><em>x</em></sub>)<sub>2</sub>CoO<sub>3-δ</sub>]<sub>0.62</sub>CoO<sub>2</sub>, utilizing a modulated rotating magnetic field of 10 T. Our findings reveal a significant correlation between the magnetic anisotropy and local structure of RE ions, particularly bond lengths and coordination numbers, which influence the magnetization axes of these magnetically aligned powders. We introduce an analytical methodology employing linear equations to calculate the magnetic susceptibilities along distinct crystallographic axes, enabling the prediction of tri-axial magnetic anisotropies at elevated concentrations of Er ions. This research not only advances our understanding of magnetic anisotropy control but also paves the way for the successful fabrication of triaxially-aligned ceramics using magneto-science techniques.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"20 ","pages":"Article 100697"},"PeriodicalIF":2.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531377","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
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 ,&nbsp;Andrea Uccello ,&nbsp;Francesco Ghezzi ,&nbsp;Luca Labate ,&nbsp;Bruno Tiribilli ,&nbsp;Ondrej Hanzel ,&nbsp;Martina Salvadori ,&nbsp;Fernando Brandi ,&nbsp;Simone Failla ,&nbsp;Cesare Melandri ,&nbsp;Anna Cremona ,&nbsp;Matteo Pedroni ,&nbsp;Marco De Angeli ,&nbsp;Enrico Perelli Cippo ,&nbsp;Leonida Antonio Gizzi ,&nbsp;Peter Tatarko ,&nbsp;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}
引用次数: 0
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