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学者姓名：杜文博
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摘要 ：
Reconciling the inherent trade-off between anodic efficiency and discharge voltage in the design of high-energy-density magnesium-air (Mg-air) batteries has been a persistent challenge. Herein, we propose a pioneering active learning strategy that integrates physically motivated variables, machine learning, exploration of the Pareto front, experimental data feedback, and generated data feedback for the purpose of designing magnesium anodes. Within an extensive compositional space (similar to 350,000 possibilities), we have pinpointed a novel alloy, Mg-1Ga-1Ca-0.5In, exhibiting exceptional performance with high efficiency (64 +/- 5.5 % at 1 mA cm(-2), 64 +/- 0.5 % at 10 mA cm(-2)) and high voltage (1.80 +/- 0.00 V at 1 mA cm(-2), 1.57 +/- 0.01 V at 10 mA cm(-2)), surpassing conventional methods of alloying. Subsequent experiments and density functional theory (DFT) calculations have unveiled that the outstanding performance of Mg-1Ga-1Ca-0.5In stems from "grain boundary activation" induced by active second phases and "intra-grain inhibition" resulting from the orbital hybridization between solute atoms and Mg atoms. This study provides a novel research paradigm and offers valuable insights for the further development of high-performance Mg-air batteries.
关键词 ：
Theoretical calculation Theoretical calculation Self-corrosion Self-corrosion Magnesium air battery Magnesium air battery Magnesium alloy Magnesium alloy Machine learning Machine learning
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| GB/T 7714 | Liang, Hongxing , Yang, Kang , Zhao, Chenchen et al. Mitigating the efficiency-voltage trade-off in magnesium air battery via a novel active learning framework [J]. | APPLIED SURFACE SCIENCE , 2024 , 657 . |
| MLA | Liang, Hongxing et al. "Mitigating the efficiency-voltage trade-off in magnesium air battery via a novel active learning framework" . | APPLIED SURFACE SCIENCE 657 (2024) . |
| APA | Liang, Hongxing , Yang, Kang , Zhao, Chenchen , Zhai, Chuantian , Wu, Liang , Du, Wenbo . Mitigating the efficiency-voltage trade-off in magnesium air battery via a novel active learning framework . | APPLIED SURFACE SCIENCE , 2024 , 657 . |
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摘要 ：
Alloying seriously deteriorates the thermal conductivity of magnesium (Mg) alloys, thus, restricts their applications in the fields of computer, communication, and consumer products. In order to improve the thermal conductivity of Mg alloys, adding carbon nanotube (CNT) combined with aging treatment is proposed in this work, i.e. fabricating the D-CNT (a kind of dispersed CNT) reinforced ZK61 matrix composite via powder metallurgy, and conducting aging treatment to the composite. Results indicate the as-aged ZK61/0.6 wt.% D-CNT composite achieved an excellent thermal conductivity of 166 W/(mK), exhibiting 52.3% enhancement in comparison with matrix, as well as tensile yield strength of 321 MPa, ultimate tensile strength of 354 of MPa, and elongation of 14%. The simultaneously enhanced thermal conductivity and mechanical performance are mainly attributed to: (1) the embedded interface of the D-CNT with matrix and (2) the coherent interface of precipitates with matrix. It is expected the current work can provide a clue for devising Mg matrix composites with integrated structural and functional performances, and enlarge the current restricted applications of Mg alloys. (c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
关键词 ：
Mg matrix composite Mg matrix composite Mechanical performance. Mechanical performance. Carbon nanotube Carbon nanotube Interface Interface Thermal conductivity Thermal conductivity
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| GB/T 7714 | Meng, Fanjing , Du, Wenbo , Du, Xian et al. Simultaneously enhanced thermal conductivity and mechanical performance of carbon nanotube reinforced ZK61 matrix composite [J]. | JOURNAL OF MAGNESIUM AND ALLOYS , 2024 , 12 (7) : 2756-2765 . |
| MLA | Meng, Fanjing et al. "Simultaneously enhanced thermal conductivity and mechanical performance of carbon nanotube reinforced ZK61 matrix composite" . | JOURNAL OF MAGNESIUM AND ALLOYS 12 . 7 (2024) : 2756-2765 . |
| APA | Meng, Fanjing , Du, Wenbo , Du, Xian , Zhu, Baohong , Liu, Ke , Li, Shubo . Simultaneously enhanced thermal conductivity and mechanical performance of carbon nanotube reinforced ZK61 matrix composite . | JOURNAL OF MAGNESIUM AND ALLOYS , 2024 , 12 (7) , 2756-2765 . |
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摘要 ：
Figuring out the effects of LPSO morphology on the deformation mode and strengthening mechanism of Mg -RE alloys is helpful to improve their formability and mechanical properties. In this work, the Mg-8Gd-1Er-1Zn-0.6Zr (GEZ811) alloys with monolithic block LPSO (B-alloy) and lamellar LPSO (L-alloy) phase were respectively prepared by different heat treatment route. The effects of the monolithic LPSO morphology on deformation mode and strengthening mechanisms during high strain rate multidirectional forging (HSMDF) were analyzed. Results showed at the initial stage of HSMDF, twinning was the dominant deformation mode for B-alloy while non -basal slip was for L-alloy. With increasing forging pass, kink band of grains became primary for B-alloy, whereas kinking and breaking of the lamellar LPSO phase was dominant for L-alloy. The optimal UTS, YS and EL of the HSMDFed B-alloy and L-alloy at 12 P were 381.6 MPa, 324.1 MPa, and 8.8 %, and 358.4 MPa, 295.0 MPa, and 5.5 %, respectively. The difference in strength between B-alloy and L-alloy resulted primarily from the contribution of grain boundary strengthening and stacking fault strengthening, while the better plasticity of B-alloy was attributed to its lower deformation activation energy and the formed kink band of grains. Retaining the block LPSO phase as much as possible in the alloy before deformation is beneficial to enhancing the mechanical performance of Mg -RE alloys.
关键词 ：
Mg-Gd-Er-Zn-Zr alloy Mg-Gd-Er-Zn-Zr alloy Deformation mode Deformation mode LPSO phase morphology LPSO phase morphology Strengthening mechanism Strengthening mechanism
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| GB/T 7714 | Ding, Ning , Du, Wenbo , Li, Xudong et al. Deformation mode and strengthening mechanism of Mg-Gd-Er-Zn-Zr alloy with different LPSO morphology [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 992 . |
| MLA | Ding, Ning et al. "Deformation mode and strengthening mechanism of Mg-Gd-Er-Zn-Zr alloy with different LPSO morphology" . | JOURNAL OF ALLOYS AND COMPOUNDS 992 (2024) . |
| APA | Ding, Ning , Du, Wenbo , Li, Xudong , Lou, Feng , Du, Xian , Li, Shubo et al. Deformation mode and strengthening mechanism of Mg-Gd-Er-Zn-Zr alloy with different LPSO morphology . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 992 . |
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摘要 ：
In this investigation, a high-strength Mg-12Gd-1.0Er-0.5Zr (wt.%) alloy sheet was produced by hot extrusion (HE) and subsequent hardplate rolling (HPR) at different temperatures. The results indicate that the microstructures of these final-rolled sheets are inhomogeneous, mainly including coarse deformed grains and dynamic recrystallized (DRXed) grains, and the volume fraction of these coarse deformed grains increases as the rolling temperature increases. Thus, more DRXed grains can be found in R-385 degrees C sheet, resulting in a smaller average grain size and weaker basal texture, while the biggest grains and the highest strong basal texture are present in R-450 degrees C sheet. Amounts of dynamic precipitation of beta phases which are mainly determined by the rolling temperature are present in these sheets, and its precipitation can consume the content of Gd solutes in the matrix. As a result, the lowest number density of beta phase in R-450 degrees C sheet is beneficial to modify the age hardening response. Thus, the R-450 degrees C sheet displays the best age hardening response because of a severe traditional precipitation of beta' (more) and beta H / beta M (less) precipitates, resulting in a sharp improvement in strength, i.e. ultimate tensile strength (UTS) of - 518 +/- 17 MPa and yield strength (YS) of - 438 +/- 18 MPa. However, the elongation (EL) of this sheet reduces greatly, and its value is - 2.7 +/- 0.3%. By contrasting, the EL of the peak-aging R-385 degrees C sheet keeps better, changing from - 4.9 +/- 1.2% to - 4.8 +/- 1.4% due to a novel dislocation-induced chain-like precipitate which is helpful to keep good balance between strength and ductility. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
关键词 ：
Age hardening response Age hardening response Mechanical properties Mechanical properties Precipitates Precipitates Mg-Gd-Er-Zr sheets Mg-Gd-Er-Zr sheets
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| GB/T 7714 | Liu, Ke , Hu, Dalong , Lou, Feng et al. Effects of deformation temperatures on microstructures, aging behaviors and mechanical properties of Mg-Gd-Er-Zr alloys fabricated by hard-plate rolling [J]. | JOURNAL OF MAGNESIUM AND ALLOYS , 2024 , 12 (6) : 2345-2359 . |
| MLA | Liu, Ke et al. "Effects of deformation temperatures on microstructures, aging behaviors and mechanical properties of Mg-Gd-Er-Zr alloys fabricated by hard-plate rolling" . | JOURNAL OF MAGNESIUM AND ALLOYS 12 . 6 (2024) : 2345-2359 . |
| APA | Liu, Ke , Hu, Dalong , Lou, Feng , Yu, Zijian , Li, Shubo , Du, Xian et al. Effects of deformation temperatures on microstructures, aging behaviors and mechanical properties of Mg-Gd-Er-Zr alloys fabricated by hard-plate rolling . | JOURNAL OF MAGNESIUM AND ALLOYS , 2024 , 12 (6) , 2345-2359 . |
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摘要 ：
一种高强塑积耐腐蚀铜镍合金及其制备工艺，涉及铜镍合金耐腐蚀与强韧化领域。合金成分为27.0～31.0％的Ni，0.8～2.0％的Fe，0.5～1.5％的Mn，0.004～0.02％的Y，0.002～0.01％的Ce，余量为Cu。原材料经真空熔炼获得铸锭后，进行均匀化退火，经热轧和冷轧后获得铜镍合金管材或板材，冷轧后的管材或板材经最终热处理获得所需产品。本发明最终制备的铜镍合金板材或管材具有高强塑积及在含硫海水中低腐蚀速率的优越性能，可解决铜镍合金在使用过程中因强度、塑性差以及在含硫海水中耐腐蚀性差造成管材或板材失效、使用寿命缩短的相关问题，在海洋工程、舰艇舰船等领域具有应用前景。
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| GB/T 7714 | 王朝辉 , 龚妍 , 全泽鑫 et al. 一种高强塑积耐腐蚀铜镍合金及其制备工艺 : CN202310282637.3[P]. | 2023-03-21 . |
| MLA | 王朝辉 et al. "一种高强塑积耐腐蚀铜镍合金及其制备工艺" : CN202310282637.3. | 2023-03-21 . |
| APA | 王朝辉 , 龚妍 , 全泽鑫 , 杜文博 , 李淑波 , 刘轲 et al. 一种高强塑积耐腐蚀铜镍合金及其制备工艺 : CN202310282637.3. | 2023-03-21 . |
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摘要 ：
一种镁空气电池负极材料Mg‑Zn‑Er合金及其制备方法和应用，涉及镁空气电池领域。合金成分为：Zn 0.6～20.0wt％，Er 0.1～3.5wt％，10≥Zn/Er≥6，其余为镁。制备方法包括如下步骤：(1)取商用纯镁，纯锌，Mg‑Er中间合金，掉表面的氧化皮；(2)将处理好的材料预热，并依次放入坩埚内熔化；(3)将熔液浇铸在模具中，冷却得到铸件。本发明通过控制Zn与Er的质量比，获得含有准晶I相Mg3Zn6Er1的微观组织，有效抑制了镁负极在水系电解液溶液中的析氢反应，并加速了产物的脱落，减少了放电产物在负极表面的堆积厚度，提升了镁空气电池的性能。
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| GB/T 7714 | 李淑波 , 张俪姝 , 赵晨辰 et al. 一种镁空气电池负极材料Mg-Zn-Er合金及其制备方法和应用 : CN202310022980.4[P]. | 2023-01-08 . |
| MLA | 李淑波 et al. "一种镁空气电池负极材料Mg-Zn-Er合金及其制备方法和应用" : CN202310022980.4. | 2023-01-08 . |
| APA | 李淑波 , 张俪姝 , 赵晨辰 , 杜文博 , 王朝辉 , 刘轲 et al. 一种镁空气电池负极材料Mg-Zn-Er合金及其制备方法和应用 : CN202310022980.4. | 2023-01-08 . |
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摘要 ：
一种引线框架用Cu‑Ni‑Si合金材料及其制备方法，涉及引线框架用铜合金加工技术领域。所述材料成分为：Ni 2.4％，Si 0.6％，Mg 0.2％，Zn 0.01％，其余为铜及不可避免的杂质。该制备方法包括如下步骤：熔炼→热轧→软化退火→一次冷轧→固溶→二次冷轧→一级时效热处理→二级时效热处理→成品轧制→拉弯矫直→去应力退火。本发明通过控制带材二级时效热处理温度，获得了含有细小弥散分布的Ni2Si及Ni3Si2相的微观组织，有效提高了合金强度。
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| GB/T 7714 | 王朝辉 , 艾鑫宇 , 杜文博 et al. 一种引线框架用Cu-Ni-Si合金材料及其制备方法 : CN202310465955.3[P]. | 2023-04-26 . |
| MLA | 王朝辉 et al. "一种引线框架用Cu-Ni-Si合金材料及其制备方法" : CN202310465955.3. | 2023-04-26 . |
| APA | 王朝辉 , 艾鑫宇 , 杜文博 , 李淑波 , 刘轲 , 杜宪 . 一种引线框架用Cu-Ni-Si合金材料及其制备方法 : CN202310465955.3. | 2023-04-26 . |
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摘要 ：
一种取向排列石墨烯增强镁基复合材料及其制备方法，涉及金属基复合材料制备领域，该方法在不破坏石墨烯结构且保证均匀分散的前提下，采用粉末冶金与多级连续热挤压结合的工艺实现石墨烯在镁基体中的取向排列，利用石墨烯沿片层方向超高的热导率，大幅度提升镁基复合材料的导热性能，在解决石墨烯取向性差问题的同时也提高了复合材料的力学性能。本发明的复合材料具有轻质、高强、高导热特点，且操作简便、环境友好，在航空航天、汽车、3C等对石墨烯增强镁基复合材料有导热与力学性能需求的领域具有广阔的应用前景。
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| GB/T 7714 | 杜文博 , 朱保洪 , 杜宪 et al. 一种取向排列石墨烯增强镁基复合材料及其制备方法 : CN202310207917.8[P]. | 2023-03-03 . |
| MLA | 杜文博 et al. "一种取向排列石墨烯增强镁基复合材料及其制备方法" : CN202310207917.8. | 2023-03-03 . |
| APA | 杜文博 , 朱保洪 , 杜宪 , 刘轲 , 李淑波 . 一种取向排列石墨烯增强镁基复合材料及其制备方法 : CN202310207917.8. | 2023-03-03 . |
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摘要 ：
一种带二次挤压成形的铜合金薄壁壳形件的半固态触变成形模具，属于半固态成形设备领域。主要包括挤压筒部分、上模部分和下模部分，其中挤压筒部分由挤压冲头、隔热板、挤压筒、加热/保温装置组成，上模由凹模、限位装置、隔热套组成，下模部分由凸模、二次挤压冲头、隔热板组成。凹模和凸模开若干个加热孔，凹模连接限位装置。本发明模具设计有二级挤压冲头，在挤压冲头完成合金的充型后，利用二次挤压冲头向上运动，实现对型腔内的坯料二次挤压成形，使得零部件的成形更加充分，同时有效地解决了成形件冷却时的补缩问题。整套模具结构简单，成形效率高，废料少，可大幅提升产品的良品率并降低了生产成本。
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| GB/T 7714 | 王朝辉 , 张佳缘 , 杜文博 et al. 一种带二次挤压成形的铜合金薄壁壳形件的半固态触变成形模具 : CN202310208087.0[P]. | 2023-03-05 . |
| MLA | 王朝辉 et al. "一种带二次挤压成形的铜合金薄壁壳形件的半固态触变成形模具" : CN202310208087.0. | 2023-03-05 . |
| APA | 王朝辉 , 张佳缘 , 杜文博 , 李淑波 , 刘轲 , 杜宪 . 一种带二次挤压成形的铜合金薄壁壳形件的半固态触变成形模具 : CN202310208087.0. | 2023-03-05 . |
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摘要 ：
The formation mechanism of beta(1) phase has been a controversy in age-hardenable magnesium-rare earth alloys for over two decades. Its nucleation and growth were not clearly illustrated so far due to the lack of direct experimental evidence. In the present work, we unveil the formation mechanism of beta(1) phase based on the in-situ and ex-situ observations using high-angle annular dark-field scanning transmission electron microscopy. The direct evidences reveal that beta(1) phase is transformed from beta(F)' phase by short-range solute diffusion, atomic shuffle coupled with shear mechanism. The beta(F)' precipitate firstly converts to intermediate precipitate via short-range solute diffusion in its zig-zag array on (10 (1) over bar0)(alpha) plane, and then transforms into beta(1) precipitate via atomic shuffle in the modified beta(F)' lattice and shear of (10 (1) over bar0)(alpha) zig-zag array by similar to 5 degrees with respect to [11 (2) over bar0](alpha) orientation. These findings shed light on the formation mechanism of beta(1) phase, and hopefully address the long-standing controversy.
关键词 ：
Rare earth Rare earth Precipitates Precipitates HAADF-STEM HAADF-STEM Ageing Ageing Mg alloy Mg alloy
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| GB/T 7714 | Yu, Zijian , Huang, Yuanding , Peng, Bin et al. Formation mechanism of β1 phase in age-hardenable magnesium-rare earth alloys: Insight from in-situ and ex-situ observations with HAADF-STEM [J]. | SCRIPTA MATERIALIA , 2023 , 237 . |
| MLA | Yu, Zijian et al. "Formation mechanism of β1 phase in age-hardenable magnesium-rare earth alloys: Insight from in-situ and ex-situ observations with HAADF-STEM" . | SCRIPTA MATERIALIA 237 (2023) . |
| APA | Yu, Zijian , Huang, Yuanding , Peng, Bin , Liu, Ke , Li, Shubo , Du, Wenbo . Formation mechanism of β1 phase in age-hardenable magnesium-rare earth alloys: Insight from in-situ and ex-situ observations with HAADF-STEM . | SCRIPTA MATERIALIA , 2023 , 237 . |
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