Article
Materials Science, Ceramics
Penghui Li, Mengdong Ma, Yingju Wu, Xiang Zhang, Yukai Chang, Zewen Zhuge, Lei Sun, Wentao Hu, Dongli Yu, Bo Xu, Zhisheng Zhao, Junyun Chen, Julong He, Yongjun Tian
Summary: By using nano-sized powders and SPS technology, high-density B4C ceramics were prepared with enhanced mechanical properties. Under the optimal SPS condition, the sample exhibited improved Vickers hardness, fracture toughness, and flexure strength.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Ali Celik, Gozde Caglar, Yasemin Celik
Summary: This study focuses on the fabrication of porous alumina ceramics using carbon black powders as a pore forming agent and spark plasma sintering technique. The physical, mechanical, and thermal properties of the ceramics were investigated after removing the carbon black particles.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Peng-cheng Li, Tao Wang, Rui-peng Guo, Qing-xue Huang, Xiao-ge Wang
Summary: The SPS technique has great potential for application in the design of Si3N4 materials with customized microstructures and properties. By examining different sintering temperatures, it was observed that the temperature gradient fields affected the transformation of the alpha-Si3N4 phase, resulting in gradient distribution of hardness and fracture toughness values in the prepared ceramics. Furthermore, when the sintering temperature exceeded 1800 degrees C, the hardness gradient reduced, possibly due to oxidation of silicon nitride.
Article
Materials Science, Ceramics
L. Audouard, M. G. Tsoutsouva, N. Horezan, E. Rimpot, J. F. Justin, P. Bertrand, C. Langlade, M. Garcia, A. Julian-Jankowiak
Summary: This study investigated the Spark Plasma Sintering (SPS) of fully stabilised hafnia with yttrium oxide (yttria) and examined the influence of manufacturing parameters on the crystallography, chemistry, and microstructure of the material. It was found that both the amount of yttria and the sintering temperature affected the final composition, lattice parameter, and microstructure of hafnia-based materials. Regardless of the amount of yttrium employed, the main phase was determined to be Y2Hf2O7 with high densification levels.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
M. Shahriari, M. Zakeri, M. Razavi, M. R. Rahimipour
Summary: The HfB2-HfC-SiC nanocomposite was successfully produced using spark plasma for the first time, with a self-propagating mode during synthesis and completion at temperatures below 400 degrees Celsius. Thermodynamic calculations and X-ray diffraction confirmed the formation of HfB2, HfC, and SiC phases, with respective crystallite sizes of about 54, 26, and 43 nm determined using the Rietveld method.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
S. Stepanov, O. Khasanov, E. Dvilis, V. Paygin, D. Valiev, M. Ferrari
Summary: The YSZ ceramics doped with Eu3+ ions were successfully fabricated by SPS technique. The increase of europium concentration did not significantly affect the transmission spectra, while annealing process at different temperatures had a significant impact on it due to the formation of oxygen vacancy defects. The luminescence decay kinetics showed characteristic features for YSZ with heavy cations in the presence of oxygen vacancies.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
V. L. Arantes, J. Sakihama, J. Vleugels
Summary: In this study, a Functionally Graded Material (FGM) with high hardness up to 25.1 GPa and good fracture toughness was successfully produced by using step graded Al2O3/NbC composites consolidated by Spark Plasma Sintering (SPS). The designed compositional gradient was maintained after sintering, resulting in fully dense crack-free graded bodies.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemistry & Molecular Biology
Hicham Mahfoz Kotb, Mohamad Mahmoud Ahmad, Sajid Ali Ansari, Tarek S. Kayed, Adil Alshoaibi
Summary: In this study, colossal dielectric constant and high dielectric loss were observed in the NLCTO ceramics prepared by mechanochemical synthesis and SPS method. The response of grain and grain boundary contributed to the two relaxation peaks in the electrical modulus spectra.
Article
Materials Science, Ceramics
T. Thor, K. Rubesova, V Jakes, D. Mikolasova, J. Cajzl, J. Havlicek, L. Nadherny, F. Prusa, R. Kucerkova, M. Nikl
Summary: Dense ceramics of Ln:Lu2O3 (Ln = Pr, Eu, Tb, Dy) were successfully obtained using spark plasma sintering (SPS), showing good optical properties and luminescent characteristics. The transparency and light yield of the sintered ceramics were improved by further annealing.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Barak Ratzker, Roni Shrem, Inbar Ayalon, Avry Shirakov, Zeev Burshtein, Sergey Kalabukhov, Nitzan Maman, Vladimir Ezersky, Amiel Ishaaya, Ehud Galun, Nachum Frage
Summary: This study utilized spark plasma sintering (SPS) to fabricate transparent Co2+:MgAl2O4 saturable absorbers for laser passive Q-switching. Doping and densification of MgAl2O4 powders were achieved using coprecipitation and high-pressure SPS (HPSPS) methods. The presence of LiF as a sintering additive negatively affected the optical properties, while HPSPS without LiF resulted in highly transparent Co2+:MgAl2O4 ceramics. The fabricated samples demonstrated saturable absorption at a wavelength of approximately 1.5 μm, with ground-state and excited cross-sections of 3.5 x 10(-19) and 0.8x10(-19) cm(2) respectively.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Mohammad Sadegh Abdi Maghsoudlou, Touradj Ebadzadeh, Alireza Aghaei
Summary: Based on technological capabilities, beta-SiAlON ceramics are synthesized using an affordable approach in this study. The results showed that the aluminosilicate precursor prepared by mechanochemical processing can be converted into high-quality SiAlON powders with excellent mechanical properties.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Van-Huy Nguyen, Mehdi Shahedi Asl, Seyed Ali Delbari, Quyet Van Le, Abbas Sabahi Namini, Joo Hwan Cha, Sea-Hoon Lee, Ho Won Jang, Mazli Mustapha, Mohsen Mohammadi, Mohammadreza Shokouhimehr
Summary: The synergic influence of graphene nano-platelets (GNPs) and AlN on TiC microstructure and consolidation behavior was evaluated. The simultaneous incorporation of AlN and GNPs improved the relative density of TiC, forming a fully dense ceramic. TiN and Al2OC were produced as in-situ phases, creating a Ti (C,N) solid solution and promoting strong interfaces among matrix grains.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Van-Huy Nguyen, Abbas Sabahi Namini, Seyed Ali Delbari, Quyet Van Le, Mehdi Shahedi Asl, Mohammadreza Shokouhimehr, Mohsen Mohammadi
Summary: Incorporation of carbon nanotubes (CNTs) into titanium carbide (TiC) matrix ceramics can enhance thermal conductivity and thermomechanical properties while reducing the residual amorphous TiO2 content.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Beiying Zhou, Hui Du, Peili Luo, Jiayi Ye
Summary: This study successfully prepared luminescent silica-based glass-ceramics embedded with YOF:Eu3+ nanocrystals at a relatively low temperature, demonstrating high optical performance and effective protection of the nanocrystals.
Article
Materials Science, Ceramics
Yun Shi, Oleg Shichalin, Yifei Xiong, Denis Kosyanov, Tong Wu, Qian Zhang, Ling Wang, Zhenzhen Zhou, Hui Wang, Jinghong Fang, Huan He, Jinqi Ni, Chaoyue Wang, Qian Liu, Jianding Yu, Sheng Cui, Haibo Wang, Anton Belov, Eugeniy Papynov
Summary: Ce3+ doped Lu3Al5O12 ceramics were successfully fabricated by SPS, and their properties such as grain size and photoluminescence were investigated. The results showed that the SPS ceramics had smaller grain size, excellent thermal stability, and higher radioluminescence intensity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Jie Zhang, Xiaoyang Chen, MingJian Ding, Jiaqiang Chen, Ping Yu
Summary: This study enhances the compositional inhomogeneity of relaxor ferroelectric thin films to improve their dielectric temperature stability. The prepared films exhibit a relatively high dielectric constant and a very low variation ratio of dielectric constant over a wide temperature range.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Cheng Chen, Fanchao Meng, Jun Song
Summary: This study systematically investigated the unfaulting mechanism of single-layer interstitial dislocation loops in irradiated L12-Ni3Al. The unfaulting routes of the loops were uncovered and the symmetry breaking during the unfaulting processes was further elucidated. A continuum model was formulated to analyze the energetics of the loops and predict the unfaulting threshold.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Darshan Bamney, Laurent Capolungo
Summary: This work investigates the formation of adjoining twin pairs (ATPs) at grain boundaries (GBs) in hexagonal close-packed (hcp) metals, focusing on the co-nucleation (CN) of pairs of deformation twins. A continuum defect mechanics model is proposed to study the energetic feasibility of CN of ATPs resulting from GB dislocation dissociation. The model reveals that CN is preferred over the nucleation of a single twin variant for low misorientation angle GBs. Further analysis considering GB character and twin system alignment suggests that CN events could be responsible for ATP formation even at low m' values.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Bing Han, Zhengqian Fu, Guoxiang Zhao, Xuefeng Chen, Genshui Wang, Fangfang Xu
Summary: This study investigates the behavior of electric-field induced antiferroelectric to ferroelectric (AFE-FE) phase transition and reveals the evolution of atomic displacement ordering as the cause for the transition behavior changing from sharp to diffuse. The novel semi-ordered configuration results from the competing interaction between long-range displacement modulation and compositional inhomogeneity, which leads to a diffuse AFE-FE transition while maintaining the switching field.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Xin Ji, Yan Chong, Satoshi Emura, Koichi Tsuchiya
Summary: A heterogeneous microstructure in Ti-15Mo-3Al alloy with heterogeneous distributions of Mo element and omega(iso) precipitates has achieved a four-fold increase in tensile ductility without a loss of tensile strength, by blocking the propagation of dislocation channels and preventing the formation of micro-cracks.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Amit Samanta, Prasanna Balaprakash, Sylvie Aubry, Brian K. Lin
Summary: This study proposes a combined large-scale first principles approach with machine learning and materials informatics to quickly explore the chemistry-composition space of advanced high strength steels (AHSS). The distribution of aluminum and manganese atoms in iron is systematically explored using first principles calculations to investigate low stacking fault energy configurations. The use of an automated machine learning tool, DeepHyper, speeds up the computational process. The study provides insights into the distribution of aluminum and manganese atoms in systems containing stacking faults and their effects on the equilibrium distribution.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Pengfei Yang, Qichang Li, Zhongying Wang, Yuxiao Gao, Wei Jin, Weiping Xiao, Lei Wang, Fusheng Liu, Zexing Wu
Summary: In this study, the HER performance of Ru-based catalysts is significantly improved through the dual-doping strategy. The obtained catalyst exhibits excellent performance in alkaline freshwater and alkaline seawater, and can be stably operated in a self-assembled overall water splitting electrolyzer.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ilias Bikmukhametov, Garritt J. Tucker, Gregory B. Thompson
Summary: Depositing a Ni-1at. % P film can facilitate the formation of multiple quintuple twin junctions, resulting in a five-fold twin structure and a pentagonal pyramid surface topology. The ability to control material structures offers opportunities for creating novel surface topologies, which can be used as arrays of field emitters or textured surfaces.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Zening Yang, Weiwei Sun, Zhengyu Sun, Mutian Zhang, Jin Yu, Yubin Wen
Summary: Multicomponent oxides (MCOs) have wide applications and accurately predicting their thermal expansion remains challenging. This study introduces an innovative attention-based deep learning model, which achieves improved performance by using two self-attention modules and demonstrates adaptability and interpretability.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Ze Liu, Cai Chen, Yuanxun Zhou, Lanting Zhang, Hong Wang
Summary: This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.
SCRIPTA MATERIALIA
(2024)
Article
Nanoscience & Nanotechnology
Mike Schneider, Jean-Philippe Couzinie, Amin Shalabi, Farhad Ibrahimkhel, Alberto Ferrari, Fritz Koermann, Guillaume Laplanche
Summary: This work aims to predict the microstructure of recrystallized medium and high-entropy alloys, particularly the density and thickness of annealing twins. Through experiments and simulations, a database is provided for twin boundary engineering in alloy development. The results also support existing theories and empirical relationships.
SCRIPTA MATERIALIA
(2024)