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Evaluating The Effects Of Granulated Rubber And Glass Fibers In Polymer Concrete As A Structural Material For Wafer Grinding Machines, Kevin Gabriel Kuehn, Philip Randall Streeter 2022 California Polytechnic State University, San Luis Obispo

Evaluating The Effects Of Granulated Rubber And Glass Fibers In Polymer Concrete As A Structural Material For Wafer Grinding Machines, Kevin Gabriel Kuehn, Philip Randall Streeter

Materials Engineering

Polymer concrete is a composite material used to replace cast iron and steel in wafer grinding machines for vibration damping. During the grinding and lapping processes of manufacturing silicon wafers, excessive vibrations may cause subsurface damage which requires additional polishing and reduces yield. Nine compositions containing various levels of granulated rubber and glass fibers were manufactured. CRM WRF-10 granulated rubber was examined at 0%, 5%, and 10% and Corning Cem-Fil glass fibers were added at 0%, 0.5%, and 1% by weight. Smooth-On EpoxAcast 690 epoxy resin was held constant at 16% for each composition. Crushed granite aggregate from Martin ...


Rare Earth Monosilicates As Oxidation Resistant Interphase For SicF/Sic Cmc: Investigation Of SicF/Yb2Sio5 Model Composites, Xirui LV, Mengkun YUE, Xue FENG, Xiaoyan LI, Yumin WANG, Jiemin WANG, Jie ZHANG, Jingyang WANG 2022 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

Rare Earth Monosilicates As Oxidation Resistant Interphase For SicF/Sic Cmc: Investigation Of SicF/Yb2Sio5 Model Composites, Xirui Lv, Mengkun Yue, Xue Feng, Xiaoyan Li, Yumin Wang, Jiemin Wang, Jie Zhang, Jingyang Wang

Journal of Advanced Ceramics

Model composites consisting of SiC fiber and Yb2SiO5 were processed by the spark plasma sintering (SPS) method. The mechanical compatibility and chemical stability between Yb2SiO5 and SiC fiber were studied to evaluate the potential application of Yb monosilicate as the interphase of silicon carbide fiber reinforced silicon carbide ceramic matrix composite (SiCf/SiC CMC). Two kinds of interfaces, namely mechanical and chemical bonding interfaces, were achieved by adjusting sintering temperature. SiCf/Yb2SiO5 interfaces prepared at 1450 and 1500 ℃ exhibit high interface strength and debond energy, which do not satisfy ...


Realizing Enhanced Energy Storage And Hardness Performances In 0.90nanbo3–0.10bi(Zn0.5Sn0.5)O3 Ceramics, Xiaoyan DONG, Xu LI, Hongyun CHEN, Qinpeng DONG, Jiaming WANG, Xiang WANG, Yue PAN, Xiuli CHEN, Huanfu ZHOU 2022 Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China

Realizing Enhanced Energy Storage And Hardness Performances In 0.90nanbo3–0.10bi(Zn0.5Sn0.5)O3 Ceramics, Xiaoyan Dong, Xu Li, Hongyun Chen, Qinpeng Dong, Jiaming Wang, Xiang Wang, Yue Pan, Xiuli Chen, Huanfu Zhou

Journal of Advanced Ceramics

Ceramic dielectric capacitors have a broad scope of application in pulsed power supply devices. Relaxor behavior has manifested decent energy storage capabilities in dielectric materials due to its fast polarization response. In addition, an ultrahigh energy storage density can also be achieved in NaNbO3 (NN)-based ceramics by combining antiferroelectric and relaxor characteristics. Most of the existing reports about lead-free dielectric ceramics, nevertheless, still lack the relevant research about domain evolution and relaxor behavior. Therefore, a novel lead-free solid solution, (1−x)NaNbO3–xBi(Zn0.5Sn0.5)O3 (abbreviated as xBZS, x = 0.05 ...


Advances In 3d Printing Of Magnetic Materials: Fabrication, Properties, And Their Applications, Xiangxia WEI, Ming-Liang JIN, Haiqiang YANG, Xiao-Xiong WANG, Yun-Ze LONG, Zhangwei CHEN 2022 Institute for Future, School of Automation, Shandong Key Laboratory of Industrial Control Technology, Qingdao University, Qingdao 266071, China

Advances In 3d Printing Of Magnetic Materials: Fabrication, Properties, And Their Applications, Xiangxia Wei, Ming-Liang Jin, Haiqiang Yang, Xiao-Xiong Wang, Yun-Ze Long, Zhangwei Chen

Journal of Advanced Ceramics

Magnetic materials are of increasing importance for many essential applications due to their unique magnetic properties. However, due to the limited fabrication ability, magnetic materials are restricted by simple geometric shapes. Three-dimensional (3D) printing is a highly versatile technique that can be utilized for constructing magnetic materials. The shape flexibility of magnets unleashes opportunities for magnetic composites with reducing post-manufacturing costs, motivating the review on 3D printing of magnetic materials. This paper focuses on recent achievements of magnetic materials using 3D printing technologies, followed by the characterization of their magnetic properties, which are further enhanced by modification. Interestingly, the corresponding ...


High-Entropy Spinel Ferrites Mfe2O4 (M = Mg, Mn, Fe, Co, Ni, Cu, Zn) With Tunable Electromagnetic Properties And Strong Microwave Absorption, Jiabin MA, Biao ZHAO, Huimin XIANG, Fu-Zhi DAI, Yi LIU, Rui ZHANG, Yanchun ZHOU 2022 Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China;Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China

High-Entropy Spinel Ferrites Mfe2O4 (M = Mg, Mn, Fe, Co, Ni, Cu, Zn) With Tunable Electromagnetic Properties And Strong Microwave Absorption, Jiabin Ma, Biao Zhao, Huimin Xiang, Fu-Zhi Dai, Yi Liu, Rui Zhang, Yanchun Zhou

Journal of Advanced Ceramics

Ferrites are the most widely used microwave absorbing materials to deal with the threat of electromagnetic (EM) pollution. However, the lack of sufficient dielectric loss capacity is the main challenge that limits their applications. To cope with this challenge, three high-entropy (HE) spinel-type ferrite ceramics including (Mg0.2Mn0.2Fe0.2Co0.2Ni0.2)Fe2O4, (Mg0.2Fe0.2Co0.2Ni0.2Cu0.2)Fe2O4, and (Mg0.2Fe0.2Co0.2Ni0.2Zn0.2 ...


Precise Control Of Surface Oxygen Vacancies In Zno Nanoparticles For Extremely High Acetone Sensing Response, Jihyun LEE, Youngmoon CHOI, Byoung Joon PARK, Jeong Woo HAN, Hyun-Sook LEE, Jong Hyeok PARK, Wooyoung LEE 2022 Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea

Precise Control Of Surface Oxygen Vacancies In Zno Nanoparticles For Extremely High Acetone Sensing Response, Jihyun Lee, Youngmoon Choi, Byoung Joon Park, Jeong Woo Han, Hyun-Sook Lee, Jong Hyeok Park, Wooyoung Lee

Journal of Advanced Ceramics

ZnO has been studied intensely for chemical sensors due to its high sensitivity and fast response. Here, we present a simple approach to precisely control oxygen vacancy contents to provide significantly enhanced acetone sensing performance of commercial ZnO nanopowders. A combination of H2O2 treatment and thermal annealing produces optimal surface defects with oxygen vacancies on the ZnO nanoparticles (NPs). The highest response of ~27,562 was achieved for 10 ppm acetone in 0.125 M H2O2 treated/annealed ZnO NPs at the optimal working temperature of 400 ℃, which is significantly higher than that of ...


Fabrication And Properties Of Non-Stoichiometric Tb2(Hf1–XTbX)2O7–X Magneto-Optical Ceramics, Lixuan ZHANG, Xiaoying LI, Dianjun HU, Ziyu LIU, Tengfei XIE, Lexiang WU, Zhaoxiang YANG, Jiang LI 2022 Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Fabrication And Properties Of Non-Stoichiometric Tb2(Hf1–XTbX)2O7–X Magneto-Optical Ceramics, Lixuan Zhang, Xiaoying Li, Dianjun Hu, Ziyu Liu, Tengfei Xie, Lexiang Wu, Zhaoxiang Yang, Jiang Li

Journal of Advanced Ceramics

Non-stoichiometric Tb2(Hf1−xTbx)2O7−x (x = −0.07–0.45) magneto-optical ceramics were fabricated by solid-state reactive sintering in vacuum combined with hot isostatic pressing (HIP) post-treatment without any sintering aids. The phase composition, densification process, microstructure, optical transmittance, and Verdet constant of Tb2(Hf1−xTbx)2O7−x ceramics were investigated. The in-line transmittance of (Tb0.93Hf0.07)2Hf2O7.07 ceramics with a thickness of 2.0 mm reaches 74.6% at 1064 nm. The Verdet constant of Tb2 ...


A High-Entropy Spinel Ceramic Oxide As The Cathode For Proton-Conducting Solid Oxide Fuel Cells, Yangsen XU, Xi XU, Lei BI 2022 School of Resource Environment and Safety Engineering, University of South China, Hengyang 421001, China

A High-Entropy Spinel Ceramic Oxide As The Cathode For Proton-Conducting Solid Oxide Fuel Cells, Yangsen Xu, Xi Xu, Lei Bi

Journal of Advanced Ceramics

A high-entropy ceramic oxide is used as the cathode for the first time for proton-conducting solid oxide fuel cells (H-SOFCs). The Fe0.6Mn0.6Co0.6Ni0.6Cr0.6O4 (FMCNC) high-entropy spinel oxide has been successfully prepared, and the in situ chemical stability test demonstrates that the FMCNC material has good stability against CO2. The first-principles calculation indicates that the high-entropy structure enhances the properties of the FMCNC material that surpasses their individual components, leading to lower O2 adsorption energy for FMCNC than that for the individual components. The ...


Low-Temperature Densification Of High-Entropy (Ti,Zr,Nb,Ta,Mo)C–Co Composites With High Hardness And High Toughness, Si-Chun LUO, Wei-Ming GUO, Kevin PLUCKNETT, Hua-Tay LIN 2022 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;School of Mechanical and Electronic Engineering, Pingxiang University, Pingxiang 337000, China

Low-Temperature Densification Of High-Entropy (Ti,Zr,Nb,Ta,Mo)C–Co Composites With High Hardness And High Toughness, Si-Chun Luo, Wei-Ming Guo, Kevin Plucknett, Hua-Tay Lin

Journal of Advanced Ceramics

In order to prepare high toughness (Ti,Zr,Nb,Ta,Mo)C ceramics at low temperatures while maintaining high hardness, a liquid-phase sintering process combined with Co-based liquid-phase extrusion strategy was adopted in this study. The densification temperature can be lowered to 1350 ℃, which is much lower than the solid-state sintering temperature (~2000 ℃) generally employed for high-entropy carbide ceramics. When sintered at 1550 ℃ and 30 MPa applied pressure, part of the Co-based liquid-phase was squeezed out of the graphite mold, such that only ~3.21 vol% of Co remained in the high-entropy ceramic. Compared to the Co-free solid-state sintered (Ti ...


Interior-Collapsing Mechanism By Hydrothermal Process Of The Mgal2O4/Mgo Porous Ceramic, Yao YAO, Yue ZHANG 2022 Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Interior-Collapsing Mechanism By Hydrothermal Process Of The Mgal2O4/Mgo Porous Ceramic, Yao Yao, Yue Zhang

Journal of Advanced Ceramics

Ceramic core is a critical component in the super-alloy turbine blade casting. In our previous work, a novel multi-phase MgAl2O4/MgO porous ceramic was prepared for this purpose. The most important property was that it crumbled completely after hydrothermal treatment in just pure water, due to the hydration of MgO. In this work, the hydration process of the MgO embedded in the inert matrix was investigated in detail. The collapse behaved as an interior destruction without any bulk expansion of the sample. The hydration percentage was the only factor related to the water-collapsibility. The morphology of hydration ...


Synthesis And Property Characterization Of Ternary Laminar Zr2Sb Ceramic, Qiqiang ZHANG, Shuai FU, Detian WAN, Yiwang BAO, Qingguo FENG, Salvatore GRASSO, Chunfeng HU 2022 Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Synthesis And Property Characterization Of Ternary Laminar Zr2Sb Ceramic, Qiqiang Zhang, Shuai Fu, Detian Wan, Yiwang Bao, Qingguo Feng, Salvatore Grasso, Chunfeng Hu

Journal of Advanced Ceramics

In this paper, Zr2SB ceramic with purity of 82.95 wt% (containing 8.96 wt% ZrB2 and 8.09 wt% zirconium) and high relative density (99.03%) was successfully synthesized from ZrH2, sublimated sulfur, and boron powders by spark plasma sintering (SPS) at 1300 ℃. The reaction process, microstructure, and physical and mechanical properties of Zr2SB ceramic were systematically studied. The results show that the optimum molar ratio to synthesize Zr2SB is n(ZrH2):n(S):n(B) = 1.4:1.6:0.7. The average grain size of Zr2SB ...


Cs3Bi2I9–Hydroxyapatite Composite Waste Forms For Cesium And Iodine Immobilization, Kun YANG, Yachun WANG, Junhua SHEN, Spencer M. SCOTT, Brian J. RILEY, John D. VIENNA, Jie LIAN 2022 Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, USA

Cs3Bi2I9–Hydroxyapatite Composite Waste Forms For Cesium And Iodine Immobilization, Kun Yang, Yachun Wang, Junhua Shen, Spencer M. Scott, Brian J. Riley, John D. Vienna, Jie Lian

Journal of Advanced Ceramics

Perovskite-based ceramic composites were developed as potential waste form materials for immobilizing cesium (Cs) and iodine (I) with high waste loadings and chemical durability. The perovskite Cs3Bi2I9 has high Cs (22 wt%) and I (58 wt%) content, and thus can be used as a potential host phase to immobilize these critical radionuclides. In this work, the perovskite Cs3Bi2I9 phase was synthesized by a cost effective solution-based approach, and was embedded into a highly durable hydroxyapatite matrix by spark plasma sintering to form dense ceramic composite waste forms. The chemical durabilities ...


Inactive Al3+-Doped La(CocrfemnnialX)1/(5+X)O3 High-Entropy Perovskite Oxides As High Performance Supercapacitor Electrodes, Meng GUO, Yufeng LIU, Fengnian ZHANG, Fuhao CHENG, Chufei CHENG, Yang MIAO, Feng GAO, Jun YU 2022 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Inactive Al3+-Doped La(CocrfemnnialX)1/(5+X)O3 High-Entropy Perovskite Oxides As High Performance Supercapacitor Electrodes, Meng Guo, Yufeng Liu, Fengnian Zhang, Fuhao Cheng, Chufei Cheng, Yang Miao, Feng Gao, Jun Yu

Journal of Advanced Ceramics

A series of high-entropy perovskite oxides (HEPOs) La(CoCrFeMnNiAlx)1/(5+x)O3−δ (x = 0.4, 0.5, 0.6, and 0.7) have been synthesized by coprecipitation method combined with calcination process and explored as electrodes for supercapacitors. The crystal structure, microstructure, and elemental composition of HEPOs were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS) in detail. The electrochemical properties of HEPOs as supercapacitor electrodes were elucidated. The specific capacitances of HEPOs (x = 0.4, 0.5, 0.6, and 0.7) are 281.84 ...


Near-Earth Ion Irradiation Effects On Functional Ceramic Materials: A Combined Experimental-Monte Carlo Approach, William J. Sands 2022 Clemson University

Near-Earth Ion Irradiation Effects On Functional Ceramic Materials: A Combined Experimental-Monte Carlo Approach, William J. Sands

All Theses

The near-Earth space radiation environment is a complex system that creates a harmful environment for materials to operate in. Motivated by the search for using optical defects as an indicator of radiation damage, five single-crystal functional ceramic materials were selected to undergo ion irradiation at conditions found in the near-Earth space environment. Due to the complex nature of ion irradiation effects in ceramic materials, a host of calculations and experimental characterization methods were used. Calculations using the 2013 SRIM code were used to evaluate the ion projected range and the type and number of defects (vacancies) created by ion irradiation ...


Synthesis And Property Characterization Of Rare-Earth High-Entropy Oxides With Pyrochlore-Type Structures, Candice Kinsler-Fedon 2022 University of Tennessee, Knoxville

Synthesis And Property Characterization Of Rare-Earth High-Entropy Oxides With Pyrochlore-Type Structures, Candice Kinsler-Fedon

Doctoral Dissertations

In the search for novel materials with advanced physical properties, the concept of adding configurational entropy onto a single atomic site is known to provide new avenues toward material discovery. In the case of high entropy oxides (HEOs), the ability to “tune” a material’s properties by having multiple cations on single or multiple sites allows for greater opportunity to design materials for specific applications. The work presented here explores the synthesis of new multicomponent (high entropy) oxides, followed by a detailed characterization using several techniques. We have successfully synthesized multiple single-phase polycrystalline rare-earth high entropy oxides and grown large ...


Synthesis Of Monodisperse Nanoscintillators At High Temperatures For Biomedical Relevant Applications, Eric Zhang 2022 Clemson University

Synthesis Of Monodisperse Nanoscintillators At High Temperatures For Biomedical Relevant Applications, Eric Zhang

All Dissertations

Luminescent sub-100 nm particulates continuously generate immense research interest in the biomedical field for imaging, theranostics, and optogenetics. Conventionally, upconversion nanoparticles or UV activated semiconductors are studied, however these materials are limited by biological barriers such as the skin which reduces the penetration depth of these excitation sources, tissue's auto- fluorescence, and toxicity. One approach to overcome these challenges is to use nanoscintillators (sub-100 nm materials that can generate visible light using high energy excitation sources such as x-rays) which can generate light locally to the human body. Numerous scintillators have been reported since the discovery of x-rays from ...


Enhanced Electrical Property Of Graphite/Al2O3 Composite Fabricated By Reductive Sintering Of Gel-Casted Body Using Cross-Linked Epoxy Polymer, Yoshiaki FUNAHASHI, Yunzi XIN, Kunihiko KATO, Huu Hien NGUYEN, Takashi SHIRAI 2022 Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan

Enhanced Electrical Property Of Graphite/Al2O3 Composite Fabricated By Reductive Sintering Of Gel-Casted Body Using Cross-Linked Epoxy Polymer, Yoshiaki Funahashi, Yunzi Xin, Kunihiko Kato, Huu Hien Nguyen, Takashi Shirai

Journal of Advanced Ceramics

In the present study, graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first time. The cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting process. Superior electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer, whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.


Texture And Anisotropy Of Hot-Pressed H-Bn Matrix Composite Ceramics With In Situ Formed Yag, Zhuo ZHANG, Xiaoming DUAN, Zhuo TIAN, Yujin WANG, Lan WANG, Lei CHEN, Baofu QIU, Delong CAI, Peigang HE, Dechang JIA, Yu ZHOU 2022 Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China;Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Texture And Anisotropy Of Hot-Pressed H-Bn Matrix Composite Ceramics With In Situ Formed Yag, Zhuo Zhang, Xiaoming Duan, Zhuo Tian, Yujin Wang, Lan Wang, Lei Chen, Baofu Qiu, Delong Cai, Peigang He, Dechang Jia, Yu Zhou

Journal of Advanced Ceramics

Textured hexagonal boron nitride (h-BN) matrix composite ceramics were prepared by hot- pressing using different contents of 3Y2O3-5Al2O3 (molar ratio of 3:5) as the sintering additive. During hot-pressing, the liquid Y3Al5O12 (YAG) phase showing good wettability to h-BN grains was in situ formed through the reaction between Y2O3 and Al2O3, and a coherent relationship between h-BN and YAG was observed with [010]h-BN//[1¯11]YAG and (002)h-BN//(321)YAG. In the YAG liquid phase environment formed during hot-pressing, plate-like ...


Achieving Ultra-Broadband Electromagnetic Wave Absorption In High-Entropy Transition Metal Carbides (He Tmcs), Weiming ZHANG, Huimin XIANG, Fu-Zhi DAI, Biao ZHAO, Shijiang WU, Yanchun ZHOU 2022 Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China

Achieving Ultra-Broadband Electromagnetic Wave Absorption In High-Entropy Transition Metal Carbides (He Tmcs), Weiming Zhang, Huimin Xiang, Fu-Zhi Dai, Biao Zhao, Shijiang Wu, Yanchun Zhou

Journal of Advanced Ceramics

Electronic devices pervade everyday life, which has triggered severe electromagnetic (EM) wave pollution. To face this challenge, developing EM wave absorbers with ultra-broadband absorption capacity is critically required. Currently, nano-composite construction has been widely utilized to realize impedance match and broadband absorption. However, complex experimental procedures, limited thermal stability, and interior oxidation resistance are still unneglectable issues. Therefore, it is appealing to realize ultra-broadband EM wave absorption in single-phase materials with good stability. Aiming at this target, two high-entropy transition metal carbides (HE TMCs) including (Zr,Hf,Nb,Ta)C (HE TMC-2) and (Cr,Zr,Hf,Nb,Ta)C (HE ...


Anisotropic, Biomorphic Cellular Si3N4 Ceramics With Directional Well-Aligned Nanowhisker Arrays Based On Wood-Mimetic Architectures, Songsong XU, Xiaonan ZHOU, Qiang ZHI, Junjie GAO, Liucheng HAO, Zhongqi SHI, Bo WANG, Jianfeng YANG, Kozo ISHIZAKI 2022 State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China

Anisotropic, Biomorphic Cellular Si3N4 Ceramics With Directional Well-Aligned Nanowhisker Arrays Based On Wood-Mimetic Architectures, Songsong Xu, Xiaonan Zhou, Qiang Zhi, Junjie Gao, Liucheng Hao, Zhongqi Shi, Bo Wang, Jianfeng Yang, Kozo Ishizaki

Journal of Advanced Ceramics

Inspired by the transport behavior of water and ions through the aligned channels in trees, we demonstrate a facile, scalable approach for constructing biomorphic cellular Si3N4 ceramic frameworks with well-aligned nanowhisker arrays on the surface of directionally aligned microchannel alignments. Through a facile Y(NO3)3 solution infiltration into wood-derived carbon preforms and subsequent heat treatment, we can faultlessly duplicate the anisotropic wood architectures into free-standing bulk porous Si3N4 ceramics. Firstly, α-Si3N4 microchannels were synthesized on the surface of CB-templates via carbothermal reduction nitridation (CRN). And then, homogeneous ...


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