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学者姓名：宋晓艳
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Abstract ：
A model for describing solute segregation at grain boundaries has been developed for substitutional solid solution alloys, which integrates multiple factors from atomic to microstructural scales. A concept of mo-lar Gibbs free energy of segregation was introduced to evaluate the segregating capability of the solute elements in a closed system, through which the influences of grain boundary structure, grain size, ma-terial composition, and external conditions were described. Based on the evaluation of various energy forms related to solute segregation and grain growth processes, the nature of the thermal stabilization of nanograin structures by solute segregation was disclosed. A criterion for the destabilization of nanostruc-tures, which is determined by the competition of the change rates between the molar Gibbs free energy of segregation and the total energy of grain boundaries with grain size, has been proposed. This study provided guideline to achieve high-temperature stability of nanograin structures of solid solution alloys even for the weakly segregating nanocrystalline systems.& COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
Grain boundary segregation Grain boundary segregation Thermal stabilization Thermal stabilization Grain size Grain size Solute concentration Solute concentration Substitutional solid solution Substitutional solid solution
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| GB/T 7714 | Tang, Fawei , Hou, Chao , Lu, Hao et al. Grain-boundary segregation and grain growth in nanocrystalline substitutional solid solution alloys [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 168 : 239-249 . |
| MLA | Tang, Fawei et al. "Grain-boundary segregation and grain growth in nanocrystalline substitutional solid solution alloys" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 168 (2024) : 239-249 . |
| APA | Tang, Fawei , Hou, Chao , Lu, Hao , Zhao, Zhi , Song, Xiaoyan . Grain-boundary segregation and grain growth in nanocrystalline substitutional solid solution alloys . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2024 , 168 , 239-249 . |
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Abstract ：
硬质合金中存在分布不均匀的残余热应力，在承载过程中残余热应力与外加载荷产生复杂的交互作用，影响材料的力学性能。现有的实验和模拟方法均为统计性分析方法，难以在微观组织尺度分析应力分布的细节和特征。本工作利用有限元模拟的方法研究了硬质合金的残余热应力分布特征，分析了不同载荷方式下硬质合金内的应力状态，研究了残余热应力和外加载荷之间的相互作用。基于应力分析，提出了提高硬质合金承载能力的组织结构设计方法和理论依据。该方法也可应用于其他多种多相复合材料的应力分析和微观组织优化。
Keyword ：
有限元模拟 有限元模拟 硬质合金 硬质合金 应力分析 应力分析 微观组织优化 微观组织优化
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| GB/T 7714 | 杨雨露 , 陈静洪 , 吕皓 et al. 不同加载方式下硬质合金应力状态的有限元模拟研究 [J]. | 稀有金属材料与工程 , 2023 , 52 (05) : 1774-1782 . |
| MLA | 杨雨露 et al. "不同加载方式下硬质合金应力状态的有限元模拟研究" . | 稀有金属材料与工程 52 . 05 (2023) : 1774-1782 . |
| APA | 杨雨露 , 陈静洪 , 吕皓 , 刘雪梅 , 宋晓艳 . 不同加载方式下硬质合金应力状态的有限元模拟研究 . | 稀有金属材料与工程 , 2023 , 52 (05) , 1774-1782 . |
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Abstract ：
在全球数字化飞速发展的时代,互联网、 物联网和计算机技术使数据的获取、 存储和分析变得非常高效便捷.数据科学作为科学发现的第四范式,进一步加快了数据在科学研究中的应用.政府、企业、科研院所甚至个人都积累了大量数据,越来越多的人充分认识到数据对社会经济和科技的推动作用,因此对数据生态系统的需求应运而生,需要从全生命周期的角度来构建从数据的生产到输出、应用的全过程的生态系统.对材料数据生态系统的七要素:材料数据分类、材料数据标准、数据采集、数据存储、材料数据知识产权保护、数据质量管控以及材料数据库的重要性和最新进展进行论述,描述了材料基因工程数据生态系统的建设情况.
Keyword ：
数据生态系统 数据生态系统 数据标准 数据标准 数据分类 数据分类 数据知识产权 数据知识产权 全生命周期 全生命周期 材料基因工程 材料基因工程
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| GB/T 7714 | 尹海清 , 王永伟 , 张晓彤 et al. 材料基因工程数据生态系统 [J]. | 中国材料进展 , 2023 , 42 (2) : 135-143 . |
| MLA | 尹海清 et al. "材料基因工程数据生态系统" . | 中国材料进展 42 . 2 (2023) : 135-143 . |
| APA | 尹海清 , 王永伟 , 张晓彤 , 姜雪 , 黄海友 , 张雷 et al. 材料基因工程数据生态系统 . | 中国材料进展 , 2023 , 42 (2) , 135-143 . |
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Abstract ：
W-Cu composites are commonly subjected to coupled multiple fields in service, which imposes high requirements on their overall performance. In this study, the ultrafine-grained W-Cu composite was fabricated using the combination of electroless plating and spark plasma sintering. The wear resistance and high-temperature compressive properties of the ultrafine-grained W-Cu composite were investigated and compared with those of the commercial coarse-grained counterpart. Moreover, the underlying strengthening and wear mechanisms were also discussed. Here we show that the ultrafine-grained W-Cu composite exhibits superior integrated mechanical performance, making it a potential alternative to commercial W-Cu composites.
Keyword ：
grain refinement grain refinement W-Cu composites W-Cu composites high-temperature performance high-temperature performance wear resistance wear resistance
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| GB/T 7714 | Han, Tielong , Hou, Chao , Sun, Yaochuan et al. Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites [J]. | NANOMATERIALS , 2023 , 13 (3) . |
| MLA | Han, Tielong et al. "Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites" . | NANOMATERIALS 13 . 3 (2023) . |
| APA | Han, Tielong , Hou, Chao , Sun, Yaochuan , Li, Yurong , Song, Xiaoyan . Effect of Grain Refinement on the Comprehensive Mechanical Performance of W-Cu Composites . | NANOMATERIALS , 2023 , 13 (3) . |
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Abstract ：
This work was supported by the National Key R & D Program of China (2022YFB3708800), the National Natural Science Foundation of China (92163107, 52271085, 52101003, 52171061, 52101031, and
Keyword ：
Crystal nucleation Crystal nucleation Fracture toughness Fracture toughness Ceramic grain growth Ceramic grain growth Phase transformation Phase transformation Interfacial coherence Interfacial coherence
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| GB/T 7714 | Xu, Maobao , Liu, Xuemei , Lu, Hao et al. Increase of specific interfacial coherence in nanocrystalline ceramic-metal composites [J]. | COMPOSITES PART B-ENGINEERING , 2023 , 263 . |
| MLA | Xu, Maobao et al. "Increase of specific interfacial coherence in nanocrystalline ceramic-metal composites" . | COMPOSITES PART B-ENGINEERING 263 (2023) . |
| APA | Xu, Maobao , Liu, Xuemei , Lu, Hao , Wang, Haibin , Zhao, Zhi , Hou, Chao et al. Increase of specific interfacial coherence in nanocrystalline ceramic-metal composites . | COMPOSITES PART B-ENGINEERING , 2023 , 263 . |
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Abstract ：
The mechanical properties degradation of cermets under high temperatures greatly limits their applications. In this paper, the compressive yield strength of WC-Co based cermets at high temperatures was significantly improved by the addition of Ru. Based on the detailed microstructure analyses, the contribution of Ru to the plastic deformation of the cermets was disclosed. The addition of Ru would stabilize the fcc-Co structure, leading to an increase in the proportion of the coherent WC/Co phase boundaries. The coherent phase boundaries are beneficial to avoid stress concentration across the interface and premature crack initiation, inducing higher dislocation densities and larger plastic deformation in both Co and WC phases. The solid solution strengthening effect of Ru and the Ru cluster in the Co phase can inhibit the softening of the binder phase at high temperatures. The synergy of solid solution strengthening and dislocation strengthening is responsible for the higher yield strength of WC-Co cermets with Ru at high temperatures.
Keyword ：
Ru addition Ru addition Plastic deformation Plastic deformation Cermet Cermet High-temperature strength High-temperature strength
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| GB/T 7714 | Luo, Lei , Lu, Hao , Liu, Xuemei et al. High-temperature mechanical performance of Ru doped cermets [J]. | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2023 , 116 . |
| MLA | Luo, Lei et al. "High-temperature mechanical performance of Ru doped cermets" . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 116 (2023) . |
| APA | Luo, Lei , Lu, Hao , Liu, Xuemei , Wang, Haibin , Lei, Huasheng , Yu, Zhiyang et al. High-temperature mechanical performance of Ru doped cermets . | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 2023 , 116 . |
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Abstract ：
Owing to high water content and homogeneous texture, conventional hydrogels hardly reach satisfactory mechanical performance. Tensile-resistant groups and structural heterogeneity are employed to fabricate tough hydrogels. However, those techniques significantly increase the complexity and cost of material synthesis, and have only limited applicability. Here, it is shown that ultra-tough hydrogels can be obtained via a unique hierarchical architecture composed of chemically coupled self-assembly units. The associative energy dissipation among them may be rationally engineered to yield libraries of tough gels with self-healing capability. Tunable tensile strength, fracture strain, and toughness of up to 19.6 MPa, 20 000%, and 135.7 MJ cm ⁻(3) are achieved, all of which exceed the best known records. The results demonstrate a universal strategy to prepare desired ultra-tough hydrogels in predictable and controllable manners.
Keyword ：
rational design rational design ultra-tough hydrogel ultra-tough hydrogel self-healing self-healing hierarchical network hierarchical network associative energy dissipation associative energy dissipation
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| GB/T 7714 | Zhao, Zhi , Li, Yurong , Wang, Haibin et al. Ultra-Tough Self-Healing Hydrogel via Hierarchical Energy Associative Dissipation [J]. | ADVANCED SCIENCE , 2023 , 10 (27) . |
| MLA | Zhao, Zhi et al. "Ultra-Tough Self-Healing Hydrogel via Hierarchical Energy Associative Dissipation" . | ADVANCED SCIENCE 10 . 27 (2023) . |
| APA | Zhao, Zhi , Li, Yurong , Wang, Haibin , Shan, Yupeng , Liu, Xuemei , Wu, Mengfei et al. Ultra-Tough Self-Healing Hydrogel via Hierarchical Energy Associative Dissipation . | ADVANCED SCIENCE , 2023 , 10 (27) . |
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Abstract ：
Learning about the strain/stress distribution in a material is essential to achieve its mechanical stability and proper functionality. Conventional techniques such as universal testing machines only apply to static samples with standardized geometry in laboratory environment. Soft mechanical sensors based on stretchable conductors, carbon-filled composites, or conductive gels possess better adaptability, but still face challenges from complicated fabrication process, dependence on extra readout device, and limited strain/stress mapping ability. Inspired by the camouflage mechanism of cuttlefish and chameleons, here an innovative responsive hydrogel containing light-scattering "mechano-iridophores" is developed. Force induced reversible phase separation manipulates the dynamic generation of mechano-iridophores, serving as optical indicators of local deformation. Patch-shaped mechanical sensors made from the responsive hydrogel feature fast response time (<0.4 s), high spatial resolution (approximate to 100 m), and wide dynamic ranges (e.g., 10-150% strain). The intrinsic adhesiveness and self-healing material capability of sensing patches also ensure their excellent applicability and robustness. This combination of chemical and optical properties allows strain/stress distributions in target samples to be directly identified by naked eyes or smartphone apps, which is not yet achieved. The great advantages above are ideal for developing the next-generation mechanical sensors toward material studies, damage diagnosis, risk prediction, and smart devices.
Keyword ：
bio-inspired hydrogel bio-inspired hydrogel self-healing material self-healing material mechano-iridophore mechano-iridophore naked-eye naked-eye strain/stress visualization patch strain/stress visualization patch soft mechanical sensor soft mechanical sensor
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| GB/T 7714 | Zhao, Zhi , Liu, Junjie , Wu, Mengfei et al. A Soft, Adhesive Self-Healing Naked-Eye Strain/Stress Visualization Patch [J]. | ADVANCED MATERIALS , 2023 . |
| MLA | Zhao, Zhi et al. "A Soft, Adhesive Self-Healing Naked-Eye Strain/Stress Visualization Patch" . | ADVANCED MATERIALS (2023) . |
| APA | Zhao, Zhi , Liu, Junjie , Wu, Mengfei , Yao, Xuan , Wang, Haibin , Liu, Xuemei et al. A Soft, Adhesive Self-Healing Naked-Eye Strain/Stress Visualization Patch . | ADVANCED MATERIALS , 2023 . |
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Abstract ：
The oxidation-wear properties of WC-Co cermet at high temperatures were remarkably enhanced by Ru addition for increasing life expectancy of cermet tools in high-speed cutting processes. The oxidation-resistant mecha-nisms of Co with substitutional Ru were disclosed by calculating the energy barrier for oxygen adsorption and diffusion in Co with and without Ru doping. Particularly, the oxidation of WC was effectively inhibited due to the suppression of reactions between cobalt oxides and WO3. Thus less cracking occurred in the Ru-containing cermet as its tribolayer contained fewer oxides with low shear resistance, which in turn protected the subsur-face materials from further oxidation.
Keyword ：
Oxidation-resistant mechanism Oxidation-resistant mechanism Cermet Cermet Ru doping Ru doping Oxidation behavior Oxidation behavior High-temperature wear resistance High-temperature wear resistance
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| GB/T 7714 | Luo, Lei , Wang, Haibin , Lu, Hao et al. High-temperature oxidation-wear properties of Ru-doped cermet [J]. | CORROSION SCIENCE , 2023 , 226 . |
| MLA | Luo, Lei et al. "High-temperature oxidation-wear properties of Ru-doped cermet" . | CORROSION SCIENCE 226 (2023) . |
| APA | Luo, Lei , Wang, Haibin , Lu, Hao , Liu, Xuemei , Liu, Chao , Wen, Xiao et al. High-temperature oxidation-wear properties of Ru-doped cermet . | CORROSION SCIENCE , 2023 , 226 . |
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Abstract ：
A model for describing the adsorption process of hydrogen on surface of tungsten oxide was proposed based on the first-principle calculations. Multiple factors such as type of active surface, adsorption site and distribution of oxygen vacancies were considered to evaluate the hydrogen adsorption capability of tungsten oxide. The adsorption Gibbs free energies, electronic structures and bonding characteristics under various conditions were examined to reveal the influence of oxygen vacancies on the surface. It is found that the capability of hydrogen adsorption of tungsten oxide can be significantly enhanced by adjusting the oxygen vacancy on the outermost layer of certain active surfaces. The modeling predicts that the surface structure stability and gas adsorption ability of tungsten oxide can be simultaneously improved through the formation of W -H bonds. The proposed strategy for moderating surface provides a new approach to obtain excellent gas-sensitive metal oxide materials. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
First-principles calculation First-principles calculation Metal oxide Metal oxide Oxygen vacancy Oxygen vacancy Surface adsorption Surface adsorption Gas-sensitive material Gas-sensitive material
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| GB/T 7714 | Zhang, Q. , Tang, F. W. , Zhao, Z. et al. Surface modification of tungsten oxide by oxygen vacancies for hydrogen adsorption [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2022 , 117 : 23-35 . |
| MLA | Zhang, Q. et al. "Surface modification of tungsten oxide by oxygen vacancies for hydrogen adsorption" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 117 (2022) : 23-35 . |
| APA | Zhang, Q. , Tang, F. W. , Zhao, Z. , Nie, Z. R. , Song, X. Y. . Surface modification of tungsten oxide by oxygen vacancies for hydrogen adsorption . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2022 , 117 , 23-35 . |
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