Article
Nanoscience & Nanotechnology
Lun Feng, Frederic Monteverde, William G. Fahrenholtz, Gregory E. Hilmas
Summary: Six different high-entropy diboride ceramics with AlB2 structure showed varying levels of hardness under different loads, with two compositions demonstrating superhard characteristics.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Lun Feng, William G. Fahrenholtz, Gregory E. Hilmas, Laura Silvestroni
Summary: A nominally pure and dense (Ti0.9Cr0.1)B-2 ceramic was successfully produced by spark plasma sintering, which exhibited high hardness and fine grain size. The addition of Cr element promoted densification, suppressed grain growth, and improved the hardness of the ceramic.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Jin Liu, Yongtao Zou, Guodong David Zhan, Pei Wang, Xiaozhi Yan, Duanwei He, Liping Wang
Summary: By utilizing standard Vickers diamond indenter and substitute indenters with the same shape, the hardness of nine ceramics and superhard materials was measured to assess the consistency in hardness testing. The developed testing method has broad implications in characterizing and discovering new and emerging superhard materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
K. Vasanthakumar, Revathi Gorle, S. Ariharan, Srinivasa Rao Bakshi
Summary: Single phase high entropy carbide (Ti0.2W0.2Ta0.2Mo0.2V0.2)C-0.8 compacts were successfully synthesized by reactive spark plasma sintering, showing excellent mechanical and thermal properties. The carbide exhibited uniform distribution of transition metals and high hardness and fracture toughness under sintering at 1800 degrees C.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Lun Feng, William G. Fahrenholtz, Gregory E. Hilmas, Stefano Curtarolo
Summary: Dense, dual-phase (Cr,Hf,Nb,Ta,Ti,Zr)B2-(Cr,Hf,Nb,Ta,Ti,Zr)C ceramics were synthesized and densified by boro/carbothermal reduction of oxides and spark plasma sintering, respectively. The high-entropy carbide content was about 14.5 wt%. The pinning effect of the two-phase ceramic suppressed grain growth, resulting in average grain sizes of 2.7+/-1.3 mu m for the boride phase and 1.6+/-0.7 mu m for the carbide phase. Vickers hardness values increased from 25.2+/-1.1 GPa to 38.9+/-2.5 GPa due to the indentation size effect. Boro/carbothermal reduction is a convenient method for synthesizing and densifying dual-phase high entropy boride-carbide ceramics with different combinations of transition metals and different proportions of boride and carbide phases.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Ziyan Zhang, Aria Mansouri Tehrani, Anton O. Oliynyk, Blake Day, Jakoah Brgoch
Summary: An ensemble machine-learning method is utilized to predict the hardness of materials and discover new superhard materials, demonstrating its capability in identifying materials with outstanding mechanical properties.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Guo-Wei Lin, Ji-Xuan Liu, Yuan Qin, Guo-Jun Zhang
Summary: This paper reports a novel approach to densify high-entropy carbide ceramics at relatively low temperatures using a small amount of silicon, showing that dense ceramics can be obtained at 1600 -1700 degrees C. X-ray diffraction analysis revealed the existence of non-stoichiometric high-entropy carbide phase and SiC phase in the ceramics, with the in-situ formed SiC phase inheriting the morphology of the starting silicon powder. Preliminary studies on the mechanical properties of the prepared ceramics were also conducted.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Shenglin Kang, Xuetong Zhao, Jing Guo, Yongjian Xiao, Yang Yang, Binlang He, Xilin Wang, Lijun Yang, Ruijin Liao
Summary: A transparent SiO2 glass with a high relative density of 96.8% was successfully fabricated at 200°C using cold sintering with H2SiO3 as a transient chemistry. It exhibited excellent properties including a visible light transmittance of -80%, Vickers hardness of 3.1 (+/- 0.14) GPa, and Young's modulus of 45.6 (+/- 2.7) GPa. Recrystallization and the formation of polygonal alpha-quartz grains were observed during the cold sintering process, resulting in an enhanced Vickers hardness and Young's modulus of 5.7 (+/- 0.13) GPa and 60.2 (+/- 3.2) GPa, respectively. This study provides an efficient method for designing SiO2 glass and ceramics at low sintering temperatures.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Andreas Kretschmer, Alexander Kirnbauer, Eduardo Pitthan, Daniel Primetzhofer, Kumar Yalamanchili, Helmut Rudigier, Paul Heinz Mayrhofer
Summary: The phase stability and mechanical properties of multimetal-boronitride (Hf,Ta,Ti,V,Zr)-B-N were investigated using ab initio computations and experimental methods. Non-reactively sputtered (Hf,Ta,Ti,V,Zr)-B-N coatings exhibited a single-phase fcc solid solution with exceptional hardness and thermal stability. The (Hf,Ta,Ti,V,Zr)-B-N preferred the fcc NaCl-type structure up to a B:N ratio of 3.5.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Wenhao Sha, Yingying Liu, Yabin Zhou, Yihua Huang, Zhengren Huang
Summary: Different reaction-bonded boron carbide composites with varying levels of carbon were prepared and the effect of carbon content on mechanical properties was studied. The results showed that an appropriate addition of free carbon could improve the strength of the composite, while excessive carbon content would decrease the strength.
Article
Materials Science, Ceramics
Pedro Rivero-Antunez, Rafael Cano-Crespo, Florentino Sanchez-Bajo, Arturo Dominguez-Rodriguez, Victor Morales-Florez
Summary: This work introduces a fast and direct controlled routine for the fabrication of fully dense alumina using reactive spark plasma sintering of boehmite nano-powders. The transformation kinetics of alpha-Al2O3 from seeded boehmite powders were enhanced, resulting in a lower required sintering temperature. Detailed structural and mechanical characterization showed that the reactive-SPSed samples exhibited lower indentation fracture resistance due to larger grain size.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Wuzhang Yang, Qinqing Zhu, Guorui Xiao, Zhi Ren
Summary: We synthesized and characterized metal-deficient (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)1-6B2 high-entropy diborides. A single homogeneous AlB2-type phase was obtained in the range of 0.03 <= 6 <= 0.18. The unit-cell volume showed a nonmonotonic variation with a maximum at 6 = 0.07. These metal-deficient HEBs exhibited high Vickers hardness of 16.6-18.9 GPa at a load of 9.8 N, and the increased mixing entropy contributed to their phase stability. Our results not only introduced the first series of metal-deficient AlB2-type HEBs, but also indicated the potential existence of similar multicomponent diborides.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Da-Wang Tan, Zhen-Yong Lao, Zhan Zhang, Wei-Ming Guo, Shi-Kuan Sun, Hua-Tay Lin
Summary: The addition of Mo-Co-WC sintering additive in B4C-TiB2 ceramics enhances densification and results in core-rim structured grains. The interface of the rim between TiB2 and B4C phases shows smooth and sharp features, suggesting a mechanism involving solid solution and dissolution-precipitation between TiB2 and the additive.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Fei Wang, Xu Li, Qian Xu, Ning Chen, Hao Chen, Yuan Cheng, Feifei Zhang, Zhi Tan, Jie Xing, Qiang Chen, Jianguo Zhu
Summary: An appropriate amount of (Li,Ce) ions can enhance the electrical properties and hardness of bismuth layer-structured piezoelectric ceramics, and improve the thermal depoling behavior. The enhancement of piezoelectric properties is attributed to the existence of a pseudo-tetragonal phase region, changes in the domain structure, and an increase in spontaneous polarization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Cheng Zhang, Haoren Wang, Xinyi Wang, Qin Yu, Chaoyi Zhu, Mingjie Xu, Shiteng Zhao, Rui Kou, Xin Wang, Benjamin E. MacDonald, Roger C. Reed, Kenneth S. Vecchio, Penghui Cao, Timothy J. Rupert, Enrique J. Lavernia
Summary: A new class of non-equiatomic NbTaTi-based refractory high-entropy alloys (RHEAs) with excellent cold-workability and high strength at elevated temperatures has been reported. These RHEAs can be cold-rolled to a reduction of over 90% without any surface treatment or intermediate annealing. They also exhibit considerable ductility at cryogenic conditions, overcoming the traditional strength-ductility trade-off. This class of super-formable RHEAs provides a novel design pathway for energy- and time-saving fabrication of high-temperature structural materials.
Article
Materials Science, Multidisciplinary
Cheng Zhang, Qin Yu, Yuanbo T. Tang, Mingjie Xu, Haoren Wang, Chaoyi Zhu, Jon Ell, Shiteng Zhao, Benjamin E. MacDonald, Penghui Cao, Julie M. Schoenung, Kenneth S. Vecchio, Roger C. Reed, Robert O. Ritchie, Enrique J. Lavernia
Summary: This research reports on a non-equiatomic, heterostructured high-entropy alloy FeNiCoAlTaB that exhibits remarkable combinations of mechanical properties across a wide temperature range. The alloy achieves its behavior by activating multiple individual mechanisms at different temperatures, providing a methodology for designing and fabricating multifunctional high-entropy alloys.
Article
Chemistry, Inorganic & Nuclear
Dawei Zhang, Jiyun Park, Boyuan Xu, Cijie Liu, Wei Li, Xingbo Liu, Yue Qi, Jian Luo
Summary: Aliovalent doping can adjust the formation energy of oxygen vacancies in perovskite oxides. This study investigates normal and abnormal aliovalent doping effects on redox behaviors in medium-entropy compositionally complex perovskite oxides, showing different trends in oxygen non-stoichiometry with respect to the molar ratio x. The abnormal observation is explained by the energy loss near edge structure (ELNES) analysis and density functional theory (DFT) calculations, revealing the oxidation states of different elements and their impact on oxygen vacancy formation energy.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Qizhang Yan, Jian Luo
Summary: A series of electric field-induced microstructural evolution phenomena are observed in polycrystalline Bi2O3-doped ZnO, and the underlying mechanisms are revealed. The migration of bismuth (Bi) towards the negative electrode is driven by an applied electric field, which creates a Bi-free zone near the anode and forms a junction between ZnO and Bi2O3-doped ZnO, resulting in the generation of porosity and abnormal grain growth. The formation of three distinct types of grain boundaries (GBs) and the complex transitions between disordered and ordered GBs are observed using aberration-corrected electron microscopy.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Physical
Dawei Zhang, Hector A. De Santiago, Boyuan Xu, Cijie Liu, Jamie A. Trindell, Wei Li, Jiyun Park, Mark A. Rodriguez, Eric N. Coker, Joshua D. Sugar, Anthony H. McDaniel, Stephan Lany, Liang Ma, Yi Wang, Gregory Collins, Hanchen Tian, Wenyuan Li, Yue Qi, Xingbo Liu, Jian Luo
Summary: This study explores a new class of compositionally complex perovskite oxides as redox compounds for solar thermochemical hydrogen (STCH) generation. The compound (La0.8Sr0.2)(Mn0.2Fe0.2Co0.4Al0.2)O3 achieves an optimal thermodynamic and kinetic balance, leading to a maximum H2 production. The phase stability during redox cycling is maintained through entropy stabilization.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mingde Qin, Sashank Shivakumar, Jian Luo
Summary: This study achieved exceptional high-temperature stability and improved sinterability for TiNbMoTaW-based refractory high-entropy nanoalloys (RHENs). Bulk pellets of RHENs were fabricated through ball milling and spark plasma sintering, achieving high relative densities and small grain sizes. The addition of Ni promoted sintering while maintaining high-temperature stability against rapid grain growth in high-entropy TiNbMoTaW alloys.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Ceramics
Heidy Vega, Mingde Qin, Jian Luo
Summary: A set of compositionally complex refractory oxides containing various elements has been successfully fabricated, including both single-phase and dual-phase compositions. The dual-phase equilibria are governed by a thermodynamic relation, and the ratio of trivalent rare-earth cations in different phases depends on the ionic radius. These thermodynamic relations are crucial for designing dual-phase compositionally complex ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Kevin Kaufmann, Emma Wenger, Kenneth Vecchio
Summary: The mechanical properties of rocksalt transition metal ceramics are strongly influenced by their valence electron concentration (VEC), with materials having VEC values between 9 and 10 generally exhibiting superior ductility and hardness. This study focuses on stabilizing Group-VIB carbides as room-temperature B1 structures through the addition of vanadium and correlating the VEC with nanoindentation measurements. The research thoroughly explores and verifies the minimum atom percent of vanadium required to form a single-phase B1 carbide using XRD, EDS, and EBSD techniques.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Jiyun Park, Boyuan Xu, Jie Pan, Dawei Zhang, Stephan Lany, Xingbo Liu, Jian Luo, Yue Qi
Summary: Using binary and quaternary A-site mixed {A}FeO(3) as a model system, we found that as more cation types are mixed on the A-site, the cell lattice becomes more cubic-like but the local Fe-O octahedrons are more distorted. By comparing different statistical models with experiments, we showed that considering the oxygen vacancy formation energies (E-V(f)) distribution and the vacancy interactions is crucial for accurately predicting the oxygen nonstoichiometry (delta). The E-V(f) distribution, including both the average and the spread, can be optimized to improve delta delta in some hydrogen production levels for solar thermochemical hydrogen production.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jian Luo, Naixie Zhou
Summary: As high-entropy alloys gain attention, the question of whether grain boundaries can also have high entropy arises. The concept of high-entropy grain boundaries as counterparts to high-entropy materials is discussed, emphasizing the specific thermodynamic characteristics they should possess. Using a segregation model, it is shown that both grain boundary and bulk high-entropy effects can reduce grain boundary energy with increasing temperature in multicomponent alloys, where the effective grain boundary entropy can increase with the number of components. The paper also discusses how high-entropy grain boundaries can stabilize nanocrystalline alloys at high temperatures through thermodynamic and kinetic effects.
COMMUNICATIONS MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
John Holoubek, Haodong Liu, Qizhang Yan, Zhaohui Wu, Bao Qiu, Minghao Zhang, Sicen Yu, Shen Wang, Jianbin Zhou, Tod A. Pascal, Jian Luo, Zhaoping Liu, Ying Shirley Meng, Ping Liu
Summary: This study demonstrates the reversible performance of a localized-high-concentration electrolyte (LHCE) based on ether solvents for Li||LMR batteries, improving the cycling performance and cathode-electrolyte interphase chemistry.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Xiao Liu, Kenneth Vecchio
Summary: Heterogeneous lamella (HL) structures were created in a FeCoNi-based complex concentrated alloy (CCA) with superalloy-like FCC/L1(2) microstructure through simple processing steps. Compared to the homogeneous-structured control specimens, the HL-structured specimens exhibited simultaneous improvements in strength and ductility (with s(y) up to 1 GPa, s(u) up to 1.4 GPa, and e(t) up to 16.5%), along with higher saturation magnetization and lower coercivity (with M-s up to 104 Am-2 kg(-1) and H-c as low as 833 A/m). This study provides insights on enhancing the mechanical properties of structural soft magnetic materials without compromising their magnetic properties.
MATERIALS RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Davide G. Sangiovanni, Kevin Kaufmann, Kenneth Vecchio
Summary: High-entropy carbides (HECs) have attracted considerable interest due to their high hardness and tunable mechanical and physical properties. The resistance to fracture of refractory HECs is correlated with their valence electron concentration (VEC).
Article
Materials Science, Multidisciplinary
Dawei Zhang, Yan Chen, Heidy Vega, Tianshi Feng, Dunji Yu, Michelle Everett, Joerg Neuefeind, Ke An, Renkun Chen, Jian Luo
Summary: Neutron diffraction and total scattering techniques were used to investigate a series of single-phase 10-component compositionally complex fluorite-based oxides (10CCFBOxNb). It was found that a long-range order-disorder transition occurred at x = 0.81 ± 0.01. Rietveld refinements of neutron diffraction patterns suggested that this transition was caused by the migration of oxygen anions. In addition, diffuse scattering was observed in Nb-rich compositions, indicating the presence of short-range order.
ADVANCED POWDER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sashank Shivakumar, Keqi Song, Chunyang Wang, Tianjiao Lei, Huolin L. Xin, Timothy J. Rupert, Jian Luo
Summary: This study investigates the enhanced sintering effect of Ni addition in high-entropy alloy MoNbTaW. The experiments reveal complete grain boundary wetting above the bulk solidus line and suggest the presence of a liquid-like interfacial phase below the line. The calculated GB phase diagram predicts high-temperature GB disordering and rationalizes the observed Ni-activated sintering.
SCRIPTA MATERIALIA
(2024)
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)
