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Medium-entropy(Me,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)(Me=Y and Ta):Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking

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Journal of materials Science & technology 2022年第28期123卷 144-153页

作者： Shuaihang Qiu Huimin Xiang Fu-Zhi Dai Hailong Wang Muzhang Huang Chunlei Wan Qing Meng Jiangtao Li Xiaohui Wang Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

With continuous enhancement of gas-turbine inlet temperature and rapid increase of radiant heat transfer,thermal barrier coating(TBC)materials with a combination of low thermal conductivity and good high-temperature thermal radiation shielding performance play vital roles in ensuring the durability of metallic ***,yttria-stabilized zirconia(YSZ),as the state-of-the-art TBC and current industry standard,is unable to meet such demands since it is almost translucent to high-temperature thermal ***,poor corrosion resistance of YSZ to molten calcia-magnesia-alumina-silicates(CMAS)also impedes its application in sand,dust,or volcanic ash laden *** order to improve the hightemperature thermal radiation shielding performance and CMAS resistance of YSZ and further reduce its thermal conductivity,two medium-entropy(ME)oxide ceramics,ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)and ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2),were designed and prepared by pressureless sintering of binary powder compacts in this ***(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)presents cubic structure but a trace amount of secondary phase,while ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)displays a combination of tetragonal phase(81.6 wt.%)and cubic phase(18.4 wt.%).Both ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)and ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)possess better high-temperature thermal radiation shielding performance than ***,the high-temperature thermal radiation shielding performance of ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)is superior to that of ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)due to its narrower band gap and correspondingly higher infrared absorbance(above 0.7)at the waveband of 1 to 5μ*** two ME oxides also display significantly lower thermal conductivity than YSZ and close thermal expansion coefficients(TECs)to YSZ and Ni-based *** addition,the two ME oxides possess excellent CMAS *** attack by molten CMAS at 1250℃for 4 h,merely~2μm thick penetration

关键词： Medium-entropy ceramics Thermal barrier coatings Thermal radiation shielding CMAS resistance Infrared absorbance

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具有分级界面的纳米纤维增强聚合物复合材料:用于高温介电储能应用

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Science China materials 2023年第7期66卷 2652-2661页

作者：智佳鹏王建沈忠慧李宝文张鑫南策文 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices&International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijing 100084China

陶瓷纳米填料增强的柔性聚合物基复合材料在先进电子电气系统中显示出巨大的储能应用潜力.但如何在高于150℃的条件下提高其能量密度和效率仍然是一个挑战.本文中我们采用氮化硼-钛酸钡(BNBaTiO_(3))非均质纳米纤维作为填料,耐高温的聚... 详细信息

陶瓷纳米填料增强的柔性聚合物基复合材料在先进电子电气系统中显示出巨大的储能应用潜力.但如何在高于150℃的条件下提高其能量密度和效率仍然是一个挑战.本文中我们采用氮化硼-钛酸钡(BNBaTiO_(3))非均质纳米纤维作为填料,耐高温的聚醚酰亚胺(PEI)为基体,使复合材料的介电常数和击穿强度同时提高.分级结构的BN/BaTiO_(3)/PEI界面提升了材料的陷阱密度和能级,可进一步抑制传导损耗.在此基础上,复合材料在150℃,能量效率高于90%时展现出5.23J cm^(-3)的超高能量密度,这是迄今为止纳米纤维增强聚合物复合材料中最高的能量密度.研究表明,分级界面是提高材料高温储能的有效策略,对介电材料在高温下的应用具有重要意义.

关键词： high temperature energy storage dielectrics polymer nanocomposite film capacitor

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Influences of particle size and composition on the hydrolysis behavior of MgO·nAl2O3 spinel

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Ceramics International 2025年

作者： Cao, Mengying Tu, Guangsheng Huang, Qing Liao, Jiaxing Jing, Zhengyang Chen, Bowen Tu, Bingtian Wang, Hao Wang, Weimin Fu, Zhengyi State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Hubei Xiangyang441000 China

The hydrolysis characteristic of MgO·nAl2O3 powders poses significant challenges for fabricating large-sized and complex-shaped transparent ceramic components. In this work, the hydrolysis behavior of MgO·nAl2O3 powders with designed particle size and chemical composition was systematically investigated. The results ascertained that coarse MgAl2O4 powders synthesized at higher temperatures exhibited reduced surface-active sites, and alumina-rich spinel surfaces exposed decreased unsaturated Mg atoms that catalyze water dissociation. The OH− concentrations in MgAl2O4-coarse and MgO·1.8Al2O3 suspensions were 63 % and 32 % of that in MgAl2O4-fine one, respectively, indicating an effective inhibition of the hydrolysis reaction. Ultimately, the hydrolysis mechanism of MgO·nAl2O3 was elucidated, where the boehmite protective layer (∼15 nm) formed on the particle surface after hydrolysis. This study provides a fundamental understanding of the surface properties and hydrolysis behavior of MgO·nAl2O3, which is of great significance for the preparation of spinel transparent ceramics using aqueous gel-casting. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Surface reactions

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Iron anode-based aqueous electrochemical energy storage devices: Recent advances and future perspectives

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Interdisciplinary materials 2022年第1期1卷 116-139页

作者： Jian Jiang Jinping Liu Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies School of Materials and EnergySouthwest UniversityChongqingChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhanChina Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbinChina

The ever-growing demands for green and sustainable power sources for ap-plications in grid-scale energy storage and portable/wearable devices have enabled the continual development of advanced aqueous electrochemical energy storage(EES)*** batteries and supercapacitors made of iron-based anodes are one of the most promising options due to the remark-able electrochemical features and natural abundance,pretty low cost and good environmental friendliness of ferruginous *** impressive ad-vances in developing the state-of-the-art ferruginous anodes and designing various full-cell aqueous devices have been made,there still remain key issues and challenges on the way to practical applications,which urgently need discussing to put forwards possible *** this review,rather than focusing on the detailed methods to optimize the iron anode,electrolyte,and device performance,we first give a comprehensive review on the charge storage mechanisms for ferruginous anodes in different electrolyte systems,as well as the newly developed iron-based aqueous EES *** deep in-sights,involving the inherent failure mechanisms and corresponding modification/optimization strategies toward iron anodes for the development of high-performance aqueous EES devices,will then be *** advances in applying iron-based aqueous EES devices for emerging fields such as flexible/wearable electronics and functionalized building materials will be further ***,future research trends and perspectives for maximizing the potential of current iron anodes and devices as well as exploiting brand-new iron-based aqueous EES systems are put forward.

关键词： aqueous batteries battolyser charge storage mechanism hybrid supercapacitors iron anode

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Machine learning in energy storage materials

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Interdisciplinary materials 2022年第2期1卷 175-195页

作者： Zhong-Hui Shen Han-Xing Liu Yang Shen Jia-Mian Hu Long-Qing Chen Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhanChina International School of Materials Science and Engineering Wuhan University of TechnologyWuhanChina State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijingChina Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWisconsinUSA Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA

With its extremely strong capability of data analysis,machine learning has shown versatile potential in the revolution of the materials research ***,taking dielectric capacitors and lithium‐ion batteries as two representa-tive examples,we review substantial advances of machine learning in the research and development of energy storage ***,a thorough discussion of the machine learning framework in materials science is ***,we summarize the applications of machine learning from three aspects,including discovering and designing novel materials,enriching theoretical simulations,and assisting experimentation and ***,a brief outlook is highlighted to spark more insights on the innovative implementation of machine learning in materials science.

关键词： dielectric capacitor energy storage lithiumion battery machine learning

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Porous Tungsten Synthesized Via Dealloying: Fe6w6c Induced Structure Modification and Mechanical Behavior

SSRN

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SSRN 2023年

作者： Zhang, Jian Jia, Hao Ge, Shuai Wei, Qinqin Luo, Guoqiang Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Porous tungsten with high strength is required in the nuclear industry. However, porous metals prepared by dealloying suffer from grain boundary separation and poor connectivity of the generated ligament structure, resulting in limited strength. This work synthesized porous tungsten with high strength by dealloying with Fe6W6C as the bonding phase. The sintering temperature of the precursor and C content on the Fe6W6C content is investigated, and the effects of Fe6W6C content on the microstructure and mechanical properties of porous tungsten are systematically studied. Fe6W6C can be regulated by precursor sintering temperature and C element. Temperature is the main factor affecting the Fe6W6C content. The ideal W framework is achieved at the sintering temperature is 800 °C when the C addition is 0.1~0.3 wt.% and the amount of Fe6W6C generated is 9.1~27.2 wt.%. After heat treatment, Fe6W6C rearranges under the effect of surface tension and fills into the sintered neck and the gap between the W grain, forming a smooth and continuous W-Fe6W6C composite ligament. The increase of Fe6W6C leads to increased ligament width, reduced "dangling ligaments" and neck curvature, thereby improving the mechanical properties of porous tungsten. The porosity of porous tungsten ranges from 68.1% to 70.6%, and the highest compressive strength is 105 MPa. This work provides a theoretical reference for designing and preparing high-performance porous tungsten. © 2023, The Authors. All rights reserved.

关键词： Microstructure

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Spallation Damage Mechanisms and Microstructural Evolution in Selective Laser Melted Ti-6al-4v Under Quasi-Isentropic Loading

SSRN

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SSRN 2024年

作者： Zhang, Kaichang Li, Peibo Zhang, Yang Sun, Yi Luo, Guoqiang Shen, Qiang Hubei Longzhong Laboratory Hubei Xiangyang441000 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

The microstructure of additively manufactured Ti-6Al-4V significantly differs from that of traditional casting processes, and this microstructural variation directly impacts the material's mechanical properties. To ensure the safety and stability of additively manufactured Ti-6Al-4V in practical applications, this study achieves controlled dynamic loading by optimizing the cross-sectional surface density of the structural gradient flyer(SGFs). It further explores material response characteristics under varying stress and strain rates by adjusting the loading rate in spallation experiments. The initial microstructure of Ti-6Al-4V produced via selective laser melting (SLM) was investigated and analyzed. Quasi-isentropic loading experiments were conducted on 6 mm thick samples at strain rates ranging from 5.07 to 12.38 × 104 s-1. The results demonstrate that, in comparison to as-cast alloys, the SLM-processed Ti-6Al-4V alloys exhibit reduced plasticity, primarily attributed to the higher cooling rates of SLM. The alloys predominantly display brittle fracture characteristics, with distinct transgranular fracture patterns. As the loading strain rate increases, the pulse width of the loading waveform progressively narrows, spall strength markedly rises, and cracks not only propagate but also enlarge. Grain refinement was evident in both the crack extension region and along the edges, accompanied by localized stress concentration, yet no signs of recrystallization were detected. The spall strength of the material exhibited heightened sensitivity to impact stresses relative to plate impact conditions. These findings offer critical theoretical insights into the potential applications of additively manufactured titanium alloys, particularly in aerospace and defense sectors. © 2024, The Authors. All rights reserved.

关键词： Grain refinement

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Microstructuring Conductive Electrospun Mats for Enhanced Electro‑active Biofilm Growth and High‑Performance Bioelectrocatalysis

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advanced Fiber materials 2023年第5期5卷 1699-1711页

作者： Min Li Hao Lu Jiadong Hu Xuemei Xiang Yanling Zheng Wenhu Gao Wei Sun Wei Wang Zhisong Lu Yan Qiao Institute for Clean Energy and Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Sino‑Singapore Joint Laboratory of Materials and Technologies for Proactive Health Monitoring School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Experimental Center for Virtual Simulation of Sports and Health Southwest UniversityChongqing 400715People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University TechnologyWuhan 430070People’s Republic of China Hubei Longzhong Lab Xiangyang 441000People’s Republic of China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158People’s Republic of China Singapore Institute of Manufacturing Technology Singapore 138669Singapore

Electrospun materials have attracted considerable attention in microbial fuel cells(MFC)owing to their porous structures,which facilitate the growth of electro-active biofilms(EABs).However,the impact of fiber diameter-controlled porous architectures on EAB growth and MFC performance has not been extensively ***,a highly conductive polypyrrole-modified electrospun polyacrylonitrile(PAN)mat was prepared as an electrode material for Shewanella putrefaciens CN32-based *** dominant pore size of the corresponding mat increases from 1 to around 20μm as the fiber diameter increases from 720 to 3770 *** variation affects the adhesion and growth behaviors of electrochemically active bacteria on the mat-based *** electrodes with poresranging from 2 to 10μm allow bacterial penetration into the interior,leading to significant biofilm loading and effective ***,the tight lamination of the electrospun fibers restricts bacterial growth in the deep interior *** developed a friction-induced triboelectric expanding approach to rendering the mats with layered structures to overcome this *** inter-layer spaces of the expanded conductive mat can facilitate bacterial loading from both sides of each layer and serve as channels to accelerate the catalysis of organic ***,the expanded conductive mat with appropriate pore sizes delivers superior bioelectrocatalytic performance in MFCs and dye *** on the findings,a mechanism for the porous structure-controlled EAB formation and bioelectrocatalytic performance was *** work may provide helpful guidance and insights for designing microfiber-based electrodes for microbial fuel cells.

关键词： Electrospun mat Porous structure Bioelectrocatalysis Microbial fuel cells Polypyrrole

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Ablation behavior and mechanism of MoSi2/mica/HSM modified CF/BPR composites during prolonged ablation of oxyacetylene flame

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Ceramics International 2025年

作者： Zhang, Shiquan Zhang, Jian Hu, Sheng Zhang, Ruizhi Li, Junguo Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Xiangyang441000 China School of Chemical and Environment Engineering Hubei Minzu University Enshi445000 China

Ablative thermal protection materials are widely used in entry and re-entry vehicles which benefit from their strong adaptability. However, long-term ablation has been a limitation due to the consumption of the matrix of the ablative materials. In this work, the microstructure evolution and ablation properties of the MoSi2/mica-modified CF/BPR composites with and without hollow silicate glass microspheres (HSMs) under protracted ablation have been investigated. The mass ablation rates decreased while the linear ablation rates increased when the ablation times were prolonged. The composites with 30 vol.% HSMs have good insulation properties, shown by a lower backside temperature of 240.9 °C after 100 s of ablation. The decrease in thermal conductivity limited heat transfer in both the axial and horizontal directions. This led to heat concentration and severe ablation at the central surface. The three-dimensional porous and the ladder structure formed in the transfer region, and the features gradually disappeared while extending the ablation times because of the flame erosion and formed liquid phases. The heat diffusion and concentration within the matrix established a gradient temperature field, which determined the ablation behavior and mechanism, providing valuable insights for the development of advanced ablative thermal protection materials. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Silicates

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Nitrogen‐doped tin oxide electron transport layer for stable perovskite solar cells with efficiency over 23%

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Interdisciplinary materials 2022年第2期1卷 309-315页

作者： Yanping Mo Chao Wang Xuntian Zheng Peng Zhou Jing Li Xinxin Yu Kaizhong Yang Xinyu Deng Hyesung Park Fuzhi Huang Yi‐Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanP.R.China Solar Hydrogen Production Lab Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanP.R.China International School of Materials Science and Engineering Wuhan University of TechnologyWuhanP.R.China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsanRepublic of Korea

Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition ***,tin oxide often contains pernicious defects,resulting in unsatisfactory ***,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar *** aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and ***,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalab.e strategy has shown great promise toward highly efficient and stable PSCs.

关键词： electron transport layer N doping perovskite solar cell SnO_(2)

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