Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
Sebastian Diaz-de-la-Torre, Isaac Munoz-Juarez, Jose C. Mendez-Garcia, Gisela Gonzalez-Corral, Mariano Casas-Luna, Edgar B. Montufar, Carolina Oliver-Urrutia, Maria Cristina Pina-Barba, Ladislav Celko
Summary: This study investigates the possibility of manufacturing dense and nanocrystalline hydroxyapatite (HA) large monoliths using spark plasma extrusion (SPE). The results show that binder-free extrusion of pre-compacted HA powder is feasible at temperatures similar to those at which nanocrystalline HA exhibits superplastic behavior. The extrusion process involves sliding, rotation, and grain boundary sliding of particles to produce monoliths with specific dimensions and alignment. The dehydration and smooth surface of the powder are important factors for facilitating additive-free HA extrusion. The extruded HA preserves its stoichiometry, nanometric grain size, and preferential microstructural alignment.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Damien Bregiroux, Julie Cedelle
Summary: The study found that by controlling the sintering temperature during SPS, ZnS ceramics with small grain size and almost full density could be obtained, but higher temperatures could lead to grain growth, affecting mechanical properties. Keeping the grain size below 100 nm appears to be the key to developing high-performance ZnS functional ceramics.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Charles Manierea, Joseph Sambasene Diatta, Christophe Couder, Christelle Harnois, Sylvain Marinel
Summary: This study proposes a combined master sintering curve and regression method to determine all sintering model parameters. It introduces the original method of estimating the grain size curve and its impact on the densification kinetics at the final stage. The results show good agreement between the model and experimental data points.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Haobo Shi, Mei Yu, Jianhua Liu, Jie Wang, Haodong Yang, Songmei Li
Summary: Proper grain boundary density can improve the growth rate and thickness of the anodic film, while excessive grain refinement may lead to an increase in grain boundary density and weaken the final anodic film thickness.
APPLIED SURFACE SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Mei Zhang, Wen-jun Wang, Tie-chui Yuan, Si-yao Xie, Rui-di Li, Zhi-hui Zhou, Yun-bao Xu
Summary: Dense B4C material was fabricated using spark plasma sintering method, and the mechanisms of densification and grain growth were investigated. The results show that there are two sintering periods, densification period and grain growth period, and the mechanisms involve grain boundary sliding, dislocation climb, grain boundary diffusion and volume/liquid-phase diffusion.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Ceramics
Jie Liang, Xuetong Zhao, Shenglin Kang, Jing Guo, Zhiling Chen, Yuli Long, Qian Zeng, Jianjie Sun, Lijun Yang, Ruijin Liao, Clive A. Randall
Summary: In this work, a hybrid cold sintering/spark plasma sintering (CSP-SPS) process is demonstrated for densifying and controlling grain growth in ZnO ceramics. The CSP-SPS process achieves high densities (>98%) at lower temperatures (200-300 ℃) and exhibits mild grain coarsening.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Cristina Ojalvo, Victor Zamora, Rodrigo Moreno, Fernando Guiberteau, Angel L. Ortiz
Summary: An ultrafine-grained B4C composite with superior wear resistance was developed through fabrication, microstructural characterization, and mechanical and tribological testing. The study optimized the preparation process, identified the optimal sintering parameters, investigated the wear behavior, and compared it with a reference fine-grained B4C composite, demonstrating the potential for fabricating B4C tribocomponents with greater superior wear resistance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Gyeonghun Kim, Jungsu Ahn, Sangjoon Ahn
Summary: The study examined the spark plasma sintering behavior of uranium mononitride synthesized by the hydride-nitride process, revealing two regimes in the sintering process based on temperature. At lower temperatures, pellet density increased with temperature to a maximum value, while grain growth was insignificant. On the other hand, at higher temperatures, rapid achievement of maximum density and significant grain growth were observed.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ji-Hwoan Lee, Byung-Nam Kim, Satoshi Hata, Byung-Koog Jang
Summary: In Y2O3 ceramics densified at 1000 degrees C by spark plasma sintering (SPS) with a heating rate of 20 degrees C/min, non-uniform sintering behavior of grains and pores was observed. The non-uniform sintering was attributed to rapid grain growth and pore coarsening at the center, possibly due to the movement of defects towards the center under electric and magnetic fields during SPS. Spectroscopic analysis revealed the presence of introduced impurities and by-products, with water peaks being more clearly detected at high heating rates due to insufficient removal of adsorbed water during rapid densification. Carbonates were formed by the reaction of carbon with -OH, detected mostly as a C-O peak in the spectroscopic analysis.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2021)
Article
Materials Science, Ceramics
Dianguang Liu, Jianye Fan, Ke Zhao, Jinling Liu, Linan An
Summary: Dynamic hot forging (DHF) was proposed for making super-strong ZrO2 ceramics. The flexural strength of the DHF-forged sample at 1400℃ reached 1860 MPa, which was over 3 times higher than that of unforged commercial zirconia ceramics and 120 MPa higher than conventionally hot forged zirconia ceramics. The high strength was attributed to grain boundary strengthening from grain boundary sliding and grain strengthening from work hardening. DHF may have potential applications in other material systems for producing super-strong materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Zhiyong Wang, Jianping Wang, Yongsai Xu, Mingdong Yi, Guangchun Xiao, Zhaoqiang Chen, Jingjie Zhang, Hui Chen, Chonghai Xu
Summary: The impact of sintering rate on the microstructure and mechanical properties of cermets was explored using ultrafast sintering. The results showed that an appropriate heating rate could achieve rapid densification and inhibit abnormal grain growth, leading to excellent mechanical properties in (Ti, W)C cermets.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
X. Y. Ping, B. Meng, W. K. Liang, Q. Zheng, C. Li
Summary: In this study, composite powders of Ce0.85Y0.15O2-delta (YDC)-xmol% aluminum compound were prepared by mixing YDC with different amounts of Al(NO3)(3) and densified through spark plasma sintering. The formation of CeAlO3 phase and reduction in grain size were observed with increasing Al(NO3)(3) addition amount. While the presence of CeAlO3 phase in A10 and A20 samples decreased the grain boundary conductivity, the evenly distributed CeAlO3 grains in A40 led to a significant increase in grain boundary conductivity.
SOLID STATE IONICS
(2021)
Article
Materials Science, Ceramics
Ting Wang, Haiming Zhang, Lixia Cheng, Shenhua Song, Weiping Gong
Summary: Perovskite solid solution materials 0.67BiFeO(3)-0.33BaTiO(3) were synthesized using spark plasma sintering method. The materials sintered at 880℃ showed the highest density, compact microstructure, and enhanced fermelectric properties.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xing Jin, Chenjun Tang, Qinggui Li, Dong Wang, Xiang Ding, Songlin Ran
Summary: Nearly fully dense B4C-VB2 composite ceramics were prepared by reactive spark plasma sintering (SPS) technology, and the effects of the degassing time on the microstructure and mechanical properties were investigated. The optimal degassing time of 6 min resulted in excellent comprehensive performance of the final product.
CERAMICS INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Fuki Naito, Koji Morita, Daisuke Terada
Summary: The effect of the DC electric field/current on the crack healing behavior in 8Y-CSZ polycrystals was investigated. The results showed that at high temperatures, the external energies stored in the indentations were released and acted as driving forces for crack healing. Compared to static annealing, the healing behavior was accelerated several times under flash event conditions, suggesting the involvement of non-thermal processes accelerated by the flash events.
JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Nana Hashimoto, Ken-ichi Ikeda, Seiji Miura, Koji Morita, Tohru S. Suzuki, Yoshio Sakka
Summary: This study investigated the effect of constraint conditions on kink formation in Ti3SiC2 polycrystals with controlled texture and porosity. The results showed that the constraint factor caused by neighboring grains affects crystal rotation, leading to the formation of kink boundaries with different rotation angles.
MATERIALS TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Shunsuke Kayukawa, Yutaro Katsuyama, Ayu Kodaira, Tomoharu Tokunaga, Koji Morita, Atsutomo Nakamura, Kimitaka Higuchi, Takahisa Yamamoto
Summary: Thermally healed Vickers microcracks perpendicular to the (001) surface of cubic zirconia single crystals were studied using scanning transmission electron microscopy. The orientation relationship of areas with healed microcracks was restored to that of the original single crystal, but pores remained where the original microcrack was located. Isolated pore formation occurred through dislocation recovery and diffusion bonding via surface diffusion. Once isolated pores were formed, the total pore volume did not significantly change with increasing healing temperature, although pore sizes increased and the number of pores decreased. Ostwald ripening became pronounced in pore microstructure evolution when pore elimination was dominated by lattice diffusion after complete crystallographic restoration to a single crystal.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Kohta Nambu, Taisuke Kitaoka, Koji Morita, Kohei Soga, Tomoharu Tokunaga, Takahisa Yamamoto, Hiroshi Masuda, Hidehiro Yoshida
Summary: In this study, flash joining experiments were conducted using an AC field on 3 mol% Y2O3-stabilized tetragonal ZrO2 polycrystal (Y-TZP) bodies. The necessary conditions for achieving almost complete self-joining of Y-TZP bodies were clarified. By applying an AC field at specific conditions, successful joining with 92% of the flexural strength of the as-sintered Y-TZP body was achieved.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yuta Aoki, Hiroshi Masuda, Hidehiro Yoshida
Summary: A fine eutectic microstructure was obtained in an Al2O3-GdAlO3 (GAP) composite through local melting and rapid solidification during a flash event. The flash event was induced by applying a 1 kV/cm AC field at a frequency of 1 kHz to a calcined Al2O3-GAP body at a furnace temperature of 1400 degrees C. The resulting structure had rodlike GAP phases in the Al2O3 matrix with an interphase spacing of approximately 170 nm, comparable to previous studies on Al2O3-GAP eutectic materials. Flash events and subsequent rapid cooling can facilitate the formation of fine eutectic ceramics with a lower furnace temperature and shorter processing time.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Ryo Nakamura, Hiroshi Masuda, Hidehiro Yoshida
Summary: This study investigates the local mechanical responses near single grain boundaries of oxide ceramics through nanoindentation. Contrary to traditional strengthening theories, the study found negligible variations in hardness among grain interiors, grain boundary vicinities, and grain boundaries. However, transmission electron microscopy observation revealed the presence of dislocation pileups at grain boundaries. Therefore, single grain boundaries make limited contributions to the mechanical properties of oxide ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Ayano Nakamoto, Kohta Nambu, Hiroshi Masuda, Hidehiro Yoshida
Summary: Undoped Y2O3 polycrystals were densified by flash sintering under DC or AC electric field with varying holding times up to 60 min. The chemical bonding state and crystal structure were investigated by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), respectively. DC flash sintering with longer holding times (>= 30 min) resulted in blackening in cathodic regions, indicating the electrode-dependent introduction of neutral oxygen vacancies. The Y 3d3/2 and Y 3d5/2 binding energies decreased with increasing holding time in both DC- and AC-flash-sintered Y2O3 specimens, regardless of polarity, indicating that positively charged oxygen vacancies were introduced by the flash sintering in an electrode-independent manner, even under DC electric field. XRD analysis revealed short-range structural fluctuations in flash-sintered specimens with longer holding times. These electrode-dependent and independent point defect generations under electric fields may be related to the enhanced atomic diffusion during flash sintering.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Shoma Takahashi, Koji Morita, Kohta Nambu, Daisuke Terada, Kiyoshi Kobayashi, Tomoharu Tokunaga, Takahisa Yamamoto
Summary: The effect of initial grain size on microcrack healing behavior under DC electric field in 8 mol% Y2O3-stabilized cubic ZrO2 (8Y-CSZ) polycrystals was studied. The healing behavior was found to be strongly dependent on the initial grain size, with faster healing observed in fine-grained 8Y-CSZ compared to coarse-grained 8Y-CSZ. The enhanced healing phenomena observed under the flash event cannot be solely attributed to thermal effects, but also to nonthermal effects caused by the flash event. Grain boundaries were found to play an important role in the flash event, and the flash healing was accelerated through field/current-enhanced diffusional processes, especially through the grain boundary diffusivity of the cations.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Ceramics
Shintaro Kawabata, Shoma Takahashi, Kohta Nambu, Koji Morita
Summary: The effect of the flash event (FE) on microcrack healing behavior in 8 mol% yttria-stabilized zirconia was investigated under different electric field conditions and healing temperatures. The healing rate increased with crack length, indicating that external energy stored as crack surface energy played a role in driving the crack healing. The healing rate was significantly accelerated by the FE treatment under the AC electric field compared to the DC field, suggesting that nonthermal effects contributed to the enhanced healing behavior.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Michiyuki Yoshida, Mitsuki Hada, Osamu Sakurada, Koji Morita
Summary: Transparent tetragonal zirconia (3YTZ) was obtained by sinter forging nanoparticles at 950°C under an applied stress of 200 MPa. The initial compact made by gel-casting had a densely packed structure of nanoparticles. The resulting dense sample had a grain size of approximately 47 nm. The in-line transmittance of a 0.9 mm-thick sample was 28% at a wavelength of 640 nm, representing 37% of the theoretical value. The sample with the best transparency in this study had a slight whitish appearance. This study demonstrated the effectiveness of combining nanoparticle gel-casting with external pressure to lower the sintering temperature for obtaining transparent tetragonal zirconia.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Apurv Dash, Koji Morita, Luca Balice, Robert Muecke, Olivier Guillon
Summary: This article demonstrates the enhanced plasticity of gadolinium-doped ceria (GDC) ceramics under mild and strong AC electric current, in terms of steady state creep rate under both compressive and tensile loading. A current density of 25 and 200 mA mm(-2) is used for the creep deformation, and the creep rate increases by up to two orders of magnitude under electric current. The stress exponent remains unchanged for creep experiments at 1200 °C with and without electric current, suggesting a grain boundary sliding (GBS) mechanism of plastic deformation in both cases. The field-enhanced creep rate is attributed to the interaction of space-charge layer and the electric field resulting in enhanced GBS. A higher current density results in enhanced ductility of GDC even when the Joule heating effect is compensated by reducing the furnace temperature.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Applied
Hiroshi Masuda, Daiki Tamao, Hidehiro Yoshida
Summary: Recent experiments have reported the effects of external electric fields on phonon-associated phenomena in ZrO2 ceramics, such as phase transformation and diffusion. This study used density-functional perturbation theory to examine the effects of external direct current (DC) electric fields on phonon vibration properties in a tetragonal ZrO2 unit cell. The results showed that the field sensitivities of phonon characteristics exhibited significant orientation dependence, and optical phonons showed considerable field sensitivities near the Brillouin zone boundaries. In contrast, transversal acoustic phonons demonstrated a softening trend with increasing field strengths, indicating the potential phase transformation under strong external electric fields.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Daichi Morikawa, Kohta Nambu, Koji Morita, Hidehiro Yoshida, Kohei Soga
Summary: The impact of electric field/current on creep deformation in fine-grained 8 mol% Y2O3 stabilized cubic ZrO2 was investigated under direct and alternative current conditions. The acceleration effect caused by electric fields/currents, which cannot be explained by the increase in sample temperature due to Joule heating, is more significant in AC than in DC conditions. The deformation mechanism changes from diffusional creep to grain boundary sliding (GBS) under DC and AC, indicating that the athermal effect of electric field/current enhances GBS and its rate controlling process of cation diffusivity, especially in AC.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Koji Matsui, Kohei Hosoi, Bin Feng, Hidehiro Yoshida, Yuichi Ikuhara
Summary: The attainment of both high strength and toughness is the ultimate goal for most structural materials. Although ceramic materials have high strength and good chemical stability, they suffer from low toughness. Y-TZP-based ceramic materials with toughnesses exceeding 20 MPa m(1/2) and strengths over 1,200 MPa have been developed by reducing the phase stability of tetragonal zirconia through tailoring microstructure and chemistry, which can further advance the design and application of ceramic-based structural materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
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)