Query：
学者姓名：韩晓东
Refining：
Year
Type
Indexed by
Source
Complex
Co-Author
Language
Clean All
Abstract ：
Nickel (Ni)-based single crystalline superalloys are the most important high-temperature service metallic materials for aircraft engine blades. These alloys' microstructures and mechanical properties must remain stable under high temperature and stress conditions for long periods of time. Rhenium (Re) has been the most effective alloying element, which serves as a guide to distinguish the third-generation Ni-based single crystalline superalloys. However, the Re-alloying effect seems to have been exhausted in terms of further improving superalloy creep lives, although the continuous demand for longer creep lives at high temperatures persists. This study uses the mixing enthalpy alloying route by combining negative enthalpy (N-enthalpy) alloying and positive enthalpy (P-enthalpy) alloying strategies to explore a new alloying paradigm in which the Os element is uniquely selected. The P-enthalpy effect of osmium (Os) with Ni leads to the segregation of Os elements along the gamma/gamma ' interface, which, in turn, yields a small-size gamma ' phase and narrower gamma channels by the P-enthalpy-produced interface effect and size effect. The N-enthalpy effect of Os with chromium (Cr) and other alloying elements further synchronizes the formation of local chemical ordering in the gamma phase channel. These synergistic interface and size effects, together with local chemical ordering, increase the stability of the microstructure and the resistance of the dislocation movement. With these, the creep life of the Os N-enthalpy alloying superalloys approaches 1273 h under 760 degrees C/800 MPa conditions, which is almost six times more than that of the base alloy, setting a high record among all existing metals and alloys. These findings highlight the mixing enthalpy alloying paradigm of designing new materials with excellent high-temperature performance. The mixing enthalpy alloying developes new alloys and super-performance.
Keyword ：
negative enthalpy alloying negative enthalpy alloying nickel-based single crystalline superalloy nickel-based single crystalline superalloy creep life creep life mixing enthalpy alloying mixing enthalpy alloying positive enthalpy alloying positive enthalpy alloying
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhao, Junbo , Yuan, Xiaoyi , Zhao, Yunsong et al. Negative mixing enthalpy and mixing enthalpy alloying leads to interface and size effects towards superb creep resistance of nickel-based single crystalline superalloys [J]. | NATIONAL SCIENCE REVIEW , 2025 , 12 (8) . |
| MLA | Zhao, Junbo et al. "Negative mixing enthalpy and mixing enthalpy alloying leads to interface and size effects towards superb creep resistance of nickel-based single crystalline superalloys" . | NATIONAL SCIENCE REVIEW 12 . 8 (2025) . |
| APA | Zhao, Junbo , Yuan, Xiaoyi , Zhao, Yunsong , Wang, Zhanxin , Long, Haibo , Mao, Shengcheng et al. Negative mixing enthalpy and mixing enthalpy alloying leads to interface and size effects towards superb creep resistance of nickel-based single crystalline superalloys . | NATIONAL SCIENCE REVIEW , 2025 , 12 (8) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Ni-Ga alloys are the most promising bimetallic alloy catalysts for CO2 hydrogenation due to their high activity and selectivity. This study used in-situ transmission electron microscopy (TEM) to clarify the structural changes in the Ni5Ga3 intermetallic compound catalysts during the CO2 oxidation and CO2 hydrogenation processes. The results showed that as the temperature increased from 50 degrees C to 300 degrees C under CO2 conditions, crystalline Ga oxides, primarily the beta-Ga2O3 phase, formed on the Ni5Ga3(211) surface, resulting in the formation of parallel moire fringes. At the same time, Ni-rich Ni-Ga alloy nanoclusters appeared due to the excess Ni on the surface. Under H2/CO2 conditions, Ni-rich Ni-Ga alloy nanoclusters were also observed, but the formation of Ga oxide was limited. Electron energy loss spectroscopy (EELS) analysis also revealed the presence of Ga oxide but not Ni oxide phase.
Keyword ：
CO(2 )hydrogenation CO(2 )hydrogenation Intermetallic compounds Intermetallic compounds NiGa alloy catalysts NiGa alloy catalysts In-situ transmission electron microscopy In-situ transmission electron microscopy Moire fringe Moire fringe
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Sakamoto, Yasuhiro , Li, Ang , Wang, Lizhuo et al. Formation of Ni-rich Ni-Ga alloy clusters on the (221) surface of Ni5Ga3 intermetallic compounds during CO2 hydrogenation: An in-situ TEM study [J]. | MATERIALS TODAY NANO , 2025 , 31 . |
| MLA | Sakamoto, Yasuhiro et al. "Formation of Ni-rich Ni-Ga alloy clusters on the (221) surface of Ni5Ga3 intermetallic compounds during CO2 hydrogenation: An in-situ TEM study" . | MATERIALS TODAY NANO 31 (2025) . |
| APA | Sakamoto, Yasuhiro , Li, Ang , Wang, Lizhuo , Men, Yuhan , Xiao, Penny , Webley, Paul A. et al. Formation of Ni-rich Ni-Ga alloy clusters on the (221) surface of Ni5Ga3 intermetallic compounds during CO2 hydrogenation: An in-situ TEM study . | MATERIALS TODAY NANO , 2025 , 31 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Coherent twin boundary (CTB) can markedly enhance the strength of metallic materials because thermally stable CTBs act as strong barriers for blocking dislocation motion. CTB sliding should rarely happen because twinning dislocations (TDs) nucleate with a lower activation energy than a full dislocation while the gliding of TDs migrates the CTB. Here, the atomic-scale sliding process of CTB was in situ captured in a twin-structured Pt, involving two TDs that glide toward each other on two non-coplanar (111) planes separated by the CTB. They meet and then exchange their sliding planes assisted by short-range atomic diffusion to continue gliding, resulting in pure sliding across the CTB without migration of the CTB. Repeat of this pure sliding process requires the assistance of atoms diffusion to annihilate the created vacancies. This sliding mechanism enriches CTBrelated plastic deformation mechanisms.
Keyword ：
Twin boundary Twin boundary Plastic deformation Plastic deformation Diffusion Diffusion Dislocation Dislocation Pure sliding Pure sliding
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Zhanxin , Teng, Jiao , Guo, Yizhong et al. In situ atomic-scale observation of diffusion-assisted pure sliding of coherent twin boundary in Pt [J]. | ACTA MATERIALIA , 2025 , 295 . |
| MLA | Wang, Zhanxin et al. "In situ atomic-scale observation of diffusion-assisted pure sliding of coherent twin boundary in Pt" . | ACTA MATERIALIA 295 (2025) . |
| APA | Wang, Zhanxin , Teng, Jiao , Guo, Yizhong , Yang, Chengpeng , Ma, Yan , Li, Zhipeng et al. In situ atomic-scale observation of diffusion-assisted pure sliding of coherent twin boundary in Pt . | ACTA MATERIALIA , 2025 , 295 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Pseudo-binary layered compound IVVI-V2VI3 families show great promise for application in thermoelectrics. Herein, through introducing iodine in GeSb2Te4, several synergistic effects come into being and contribute to outstanding thermoelectric performance. The I Te donor-like defects suppress the hole carrier concentration from 5.72 x 1020 cm-3 to 2.80 x 1020 cm-3 . First-principles calculations reveal that iodine doping increases the band gap from 0.253 eV to 0.302 eV and contributes to valence band convergence. Seebeck coefficient value reaches up to 135.7 mV/K at 773 K, and the power factor values are entirely boosted in the whole temperature region, reaching a maximum value of 12.4 mW center dot cm-1 center dot K-2 in GeSb 2 Te 3.96 I 0.04 . Moreover, iodine doping simultaneously reduces the lattice and electronic thermal conductivity, leading to the greatly reduced total thermal conductivity from 2.89 W center dot m-1 center dot K-1 in pristine sample to 0.89 W center dot m-1 center dot K-1 in GeSb 2 Te 3.84 I 0.16 at 323 K. Finally, a maximum zT-1.12 at 773 K and an average zT-0.62 over 323-773 K are achieved in GeSb 2 Te 3.88 I 0.12 . This work puts forward an effective strategy to synergistically optimize phonon and carrier transport properties of pseudo-binary compounds through halogen doping, which may be effective in other similar material systems. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keyword ：
GeSb2Te4 GeSb2Te4 Band engineering Band engineering Layered materials Layered materials zT zT Thermoelectric Thermoelectric
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chen, Yongjin , Wu, Hong , Han, Guang et al. Synergistic effects lead to high thermoelectric performance of iodine doped pseudo-binary layered GeSb2Te4 [J]. | JOURNAL OF MATERIOMICS , 2025 , 11 (4) . |
| MLA | Chen, Yongjin et al. "Synergistic effects lead to high thermoelectric performance of iodine doped pseudo-binary layered GeSb2Te4" . | JOURNAL OF MATERIOMICS 11 . 4 (2025) . |
| APA | Chen, Yongjin , Wu, Hong , Han, Guang , Zhang, Bin , Lu, Xu , Yang, Wenge et al. Synergistic effects lead to high thermoelectric performance of iodine doped pseudo-binary layered GeSb2Te4 . | JOURNAL OF MATERIOMICS , 2025 , 11 (4) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Nickel-based single crystal superalloys exhibit excellent high temperature mechanical properties due to their unique gamma '-gamma dual phase microstructure. Microstructure design is the major strategy for increasing their properties. However, the design strategy for the size of the gamma ' phase is still lacking. This work investigates the effect of gamma ' cuboid size on the creep-rupture life of nickel-based single crystal superalloys via a comparative experiment of two alloys of similar gamma ' phase volume fractions and different elemental compositions. The alloy with smaller gamma ' phase cuboids exhibits a creep-rupture life twice as long as the alloy with an average cuboid size 30 % larger. In addition, a smaller average gamma ' phase cuboid size also contributes to a lower density of the dislocations, a smaller spacing of the raft and lower content of the topologically closed packed phases. The reasons behind these different mechanical properties and microstructures are discussed.
Keyword ：
Nickel-based single crystal superalloys Nickel-based single crystal superalloys Size effects Size effects Dislocations Dislocations TEM TEM Creep Creep
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Fan, Hao , Long, Haibo , Zhao, Junbo et al. Effect of γ′ size on the high-temperature low-stress creep of nickel-based single-crystal superalloys [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2025 , 921 . |
| MLA | Fan, Hao et al. "Effect of γ′ size on the high-temperature low-stress creep of nickel-based single-crystal superalloys" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 921 (2025) . |
| APA | Fan, Hao , Long, Haibo , Zhao, Junbo , Yuan, Xiaoyi , Zhao, Yunsong , Liu, Yinong et al. Effect of γ′ size on the high-temperature low-stress creep of nickel-based single-crystal superalloys . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2025 , 921 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The photocatalytic reduction of CO2 presents a promising avenue for carbon fuel conversion. However, the efficiency of charge utilization remains a critical barrier to industrial applications. In this study, we introduce a tandem design of Bi2WO6-BiOCl with an atomically matched interface, achieving highly efficient photoreduction of CO2 to CO. By incorporating WO42-ions and tuning coordination environment, the (110) facet of BiOCl was in-situ grown on the (200) facet of Bi2WO6. Compared to single phases and ball-milling samples, Bi2WO6-BiOCl exhibits a remarkable CO yield of 68.03 mu mol g-1 h-1 with a selectivity of 98 %. Atomic visualization and coordination analysis confirm the formation of a coherent interface that facilitates charge migration for efficient electron transport. Density functional theory (DFT) calculations and in-situ Fourier transform infrared (FTIR) spectroscopy provide insights into the intrinsic active sites and reaction mechanisms. The proposed lattice engineering strategies offer a new paradigm for the rational design of heterostructures beyond traditional band alignment at the atomic scale. (c) 2025 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
Keyword ：
Charge dynamics Charge dynamics Coherent interface Coherent interface Photocatalytic CO 2 reduction Photocatalytic CO 2 reduction Heterostructure Heterostructure Atomic precision Atomic precision
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Hui , Gao, Chunlang , Yang, Guo et al. Enhanced photocatalytic CO2 reduction of Bi2WO6-BiOCl heterostructure with coherent interface for charge utilization [J]. | CHINESE CHEMICAL LETTERS , 2025 , 36 (9) . |
| MLA | Li, Hui et al. "Enhanced photocatalytic CO2 reduction of Bi2WO6-BiOCl heterostructure with coherent interface for charge utilization" . | CHINESE CHEMICAL LETTERS 36 . 9 (2025) . |
| APA | Li, Hui , Gao, Chunlang , Yang, Guo , Xia, Lu , Jiang, Wulyu , Wu, Cheng et al. Enhanced photocatalytic CO2 reduction of Bi2WO6-BiOCl heterostructure with coherent interface for charge utilization . | CHINESE CHEMICAL LETTERS , 2025 , 36 (9) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The commercialization of Ni-based catalysts in CO2 dry reforming of methane (DRM) suffers from their quick deactivation. Here, we reveal each reaction pathway for DRM based on the Ni catalyst composition and geometry under working conditions, through one working platform combining in situ high resolution Cs corrected environmental transmission electron microscopy and electron energy-loss spectroscopy coupled with mass spectroscopy. The formation of Ni3C has been found to inhibit the decomposition of CO2 and CH4, and to promote the formation of onion-like carbon to encapsulate the Ni catalysts, leading to the deactivation of the Ni-based catalysts. Designing the suitable supports or promoters to keep the Ni surface structure under Ni-NiO cycle can drive the simultaneously amorphous carbon deposition-consumption cycle and minimise the coke formation. This research is not only for developing coke resistance Ni catalysts in the DRM, but also significant for investigating many catalysis challenges both in research and engineering.
Keyword ：
Coke formation Coke formation CO2 2 dry reforming of methane CO2 2 dry reforming of methane In situ TEM In situ TEM Ni-based catalysts Ni-based catalysts
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Zichun , Lv, Qian , Li, Ang et al. Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane [J]. | MATERIALS TODAY , 2024 , 79 : 16-27 . |
| MLA | Wang, Zichun et al. "Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane" . | MATERIALS TODAY 79 (2024) : 16-27 . |
| APA | Wang, Zichun , Lv, Qian , Li, Ang , Wu, Ping , Wang, Lizhuo , Li, Wei et al. Reveal and correlate working geometry and surface chemistry of Ni nanocatalysts in CO2 reforming of methane . | MATERIALS TODAY , 2024 , 79 , 16-27 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Solid solutions are ubiquitous in metals and alloys. Local chemical ordering (LCO) is a fundamental sub-nano/nanoscale process that occurs in many solid solutions and can be used as a microstructure to optimize strength and ductility. However, the formation of LCO has not been fully elucidated, let alone how to provide efficient routes for designing LCO to achieve synergistic effects on both superb strength and ductility. Herein, we propose the formation and control of LCO in negative enthalpy alloys. With engineering negative enthalpy in solid solutions, genetic LCO components are formed in negative enthalpy refractory high-entropy alloys (RHEAs). In contrast to conventional 'trial-and-error' approaches, the control of LCO by using engineering negative enthalpy in RHEAs is instructive and results in superior strength (1160 MPa) and uniform ductility (24.5%) under tension at ambient temperature, which are among the best reported so far. LCO can promote dislocation cross-slip, enhancing the interaction between dislocations and their accumulation at large tensile strains; sustainable strain hardening can thereby be attained to ensure high ductility of the alloy. This work paves the way for new research fields on negative enthalpy solid solutions and alloys for the synergy of strength and ductility as well as new functions. Negative enthalpy alloys act as a new concept and route for introducing various degree of local chemical ordering heterostructures, leading to superb synergy of strength and ductility.
Keyword ：
local chemical ordering local chemical ordering dislocation dislocation negative enthalpy alloys negative enthalpy alloys strength strength ductility ductility
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | An, Zibing , Yang, Tao , Shi, Caijuan et al. Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility [J]. | NATIONAL SCIENCE REVIEW , 2024 , 11 (4) . |
| MLA | An, Zibing et al. "Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility" . | NATIONAL SCIENCE REVIEW 11 . 4 (2024) . |
| APA | An, Zibing , Yang, Tao , Shi, Caijuan , Mao, Shengcheng , Wang, Lihua , Li, Ang et al. Negative enthalpy alloys and local chemical ordering: a concept and route leading to synergy of strength and ductility . | NATIONAL SCIENCE REVIEW , 2024 , 11 (4) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high-energy physics. However, traditional inorganic scintillators encounter challenges such as high fabrication costs and low light yield. Recently, low-dimensional metal halide scintillators (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure and superior radioluminescence performance. Herein, an overview of recent advancements and proposed instructive pathways for achieving high-performance LDMHS is provided. First, the scintillation physical mechanism and emphasis on the essential requirements of scintillators for diverse applications are elucidated. Furthermore, LDMHS by the B-site, introducing recent advancements and providing insights into their characteristics is categorized. This encompasses the understanding of structure-property relationships and the routes and rules for optimizing scintillation performance. Finally, the persisting challenges in this burgeoning field and proposed potential research directions for future exploration are discussed. Low-dimensional metal halide scintillators (LDMHS) have attracted significant attention due to their remarkable radioluminescence performance and diverse structures. This review systematically summarizes recent advances in LDMHS, covering aspects such as scintillation mechanisms, requirements, research progress, and applications. Additionally, it outlines current challenges and potential directions for the future development of these materials in various applications. image
Keyword ：
X-ray detection X-ray detection metal halides metal halides low-dimensional low-dimensional scintillators scintillators
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhou, Quan , Li, Wei , Xiao, Jiawen et al. Low-Dimensional Metal Halide for High Performance Scintillators [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (38) . |
| MLA | Zhou, Quan et al. "Low-Dimensional Metal Halide for High Performance Scintillators" . | ADVANCED FUNCTIONAL MATERIALS 34 . 38 (2024) . |
| APA | Zhou, Quan , Li, Wei , Xiao, Jiawen , Li, Ang , Han, Xiaodong . Low-Dimensional Metal Halide for High Performance Scintillators . | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (38) . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Metal nanowires show promise in a broad range of applications and can be fabricated via a number of methods, such as vapor-liquid-solid process and template-based electrodeposition. However, the synthesis of Al nanowires (NWs) is still challenging from the stable alumina substrate. In this work, the Ni-catalyzed fabrication of Al NWs has been realized using various Al2O3 substrates. The growth dynamics of Al NWs on Ni/Al2O3 was studied using in situ transmission electron microscopy (TEM). The effect of alumina structures, compositions, and growth temperature were investigated. The growth of Al NWs correlates with the Na addition to the alumina support. Since no eutectic mixture of nickel aluminide was formed, a mechanism of Ni-catalyzed reduction of Al2O3 for Al NWs growth has been proposed instead of the vapor-liquid-solid mechanism. The key insights reported here are not restricted to Ni-catalyzed Al NWs growth but can be extended to understanding the dynamic change and catalytic performance of Ni/Al2O3 under working conditions.
Keyword ：
in situ transmission electron microscopy (TEM) in situ transmission electron microscopy (TEM) Al nanowires Al nanowires nanowire growth nanowire growth alumina reduction alumina reduction
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Zichun , Wang, Dan , Li, Ang et al. Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM [J]. | NANO RESEARCH , 2023 , 17 (3) : 1225-1231 . |
| MLA | Wang, Zichun et al. "Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM" . | NANO RESEARCH 17 . 3 (2023) : 1225-1231 . |
| APA | Wang, Zichun , Wang, Dan , Li, Ang , Wang, Lizhuo , Han, Xiaodong , Jiang, Yijiao et al. Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM . | NANO RESEARCH , 2023 , 17 (3) , 1225-1231 . |
| Export to | NoteExpress RIS BibTex |
Export
| Results： |
Selected to |
| Format： |
