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学者姓名：杜文博
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Abstract ：
The effect of carbon nanotubes (CNTs) on the aging behavior of Mg-9Al matrix composites was studied, and the evolution of microstructures, mechanical properties and thermal conductivity of composites during the aging treatment were discussed. Results show that the addition of CNTs increases the solid solubility of Al in Mg matrix and limited the migration of grain boundaries during the aging process, which can promote the formation of continuous precipitated phases beta-Mg17Al12 in CNTs/Mg-9Al composites. The rod-shaped continuous precipitates in coherent relationship with Mg matrix can effectively hinder the dislocation movement, which can improve the mechanical properties of the composites. Besides, the reduction of solid solution Al atoms during aging process and the addition of CNTs can improve the thermal conductivity of the composites. The property evaluation indicates that the tensile yield strength, ultimate tensile strength, diffusivity and thermal conductivity of peak-aged 0.4CNTs/Mg-9Al composite are 275 MPa, 369 MPa, 34.5 mm(2)/s and 68.4 W/(mmiddotK) respectively, showing 17%, 23%, 43% and 45% increasing in comparison with those of Mg-9Al before aging.
Keyword ：
mechanical property mechanical property thermal conductivity thermal conductivity aging treatment aging treatment CNTs CNTs magnesium matrix composites magnesium matrix composites
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| GB/T 7714 | Shubo, Li , Jiangtao, Hou , Fanjing, Meng et al. Microstructure, mechanical and thermal properties of CNTs/Mg-9Al composites [J]. | CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING , 2023 , 51 (1) : 26-35 . |
| MLA | Shubo, Li et al. "Microstructure, mechanical and thermal properties of CNTs/Mg-9Al composites" . | CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING 51 . 1 (2023) : 26-35 . |
| APA | Shubo, Li , Jiangtao, Hou , Fanjing, Meng , Ke, Liu , Zhaohui, Wang , Wenbo, Du . Microstructure, mechanical and thermal properties of CNTs/Mg-9Al composites . | CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING , 2023 , 51 (1) , 26-35 . |
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Abstract ：
The lamellar and orientational characteristics of graphene nanoplatelets (GNPs) are crucial for reinforcing metal matrix composites, particularly in terms of their thermal properties. Two kinds of GNPs with plane sizes of 6 & mu;m and 80 & mu;m were respectively used as reinforcements in ZK60 alloy by powder metallurgy. The oriented distribution of GNPs in the matrix was obtained using a double-pass hot extrusion process, i.e., a stepped extrusion with two consecutive extrusion ratios (10:1 and 16:1). Reinforced with 0.05 wt% oriented GNPs (80 & mu;m), the composite exhibited a tensile yield strength of 257 MPa, ultimate tensile strength of 342 MPa, elongation of 24.7%, and notably enhanced thermal conductivity of 128.3 W (mK)(-1) even with refined grain size compared to the ZK60 alloy. The oriented GNPs in the matrix create a favorable path for efficient load and heat transfer, leading to the simultaneously enhancement of mechanical and thermal properties of the GNPs/ZK60 composites. This work is expected to broaden the application potential of GNPs as highly efficient reinforcements and provide a practical method for fabricating metal matrix composites.
Keyword ：
Magnesium Magnesium Mechanical properties Mechanical properties Thermal properties Thermal properties Orientation Orientation Graphene Graphene
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| GB/T 7714 | Zhu, Baohong , Du, Xian , Meng, Fanjing et al. Simultaneously Enhanced Thermal and Mechanical Properties of ZK60 Alloy Reinforced by Oriented Graphene Nanoplatelets [J]. | ACTA METALLURGICA SINICA-ENGLISH LETTERS , 2023 , 36 (12) : 1999-2012 . |
| MLA | Zhu, Baohong et al. "Simultaneously Enhanced Thermal and Mechanical Properties of ZK60 Alloy Reinforced by Oriented Graphene Nanoplatelets" . | ACTA METALLURGICA SINICA-ENGLISH LETTERS 36 . 12 (2023) : 1999-2012 . |
| APA | Zhu, Baohong , Du, Xian , Meng, Fanjing , Wu, Xuefeng , Liu, Ke , Li, Shubo et al. Simultaneously Enhanced Thermal and Mechanical Properties of ZK60 Alloy Reinforced by Oriented Graphene Nanoplatelets . | ACTA METALLURGICA SINICA-ENGLISH LETTERS , 2023 , 36 (12) , 1999-2012 . |
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| GB/T 7714 | Du, Baotian , Yu, Zijian , Shi, Kang et al. Improving the Mechanical Properties of Mg-Gd-Y-Ag-Zr Alloy via Pre-Strain and Two-Stage Ageing (vol 36, pg 456, 2023) [J]. | ACTA METALLURGICA SINICA-ENGLISH LETTERS , 2023 , 36 (9) : 1572-1572 . |
| MLA | Du, Baotian et al. "Improving the Mechanical Properties of Mg-Gd-Y-Ag-Zr Alloy via Pre-Strain and Two-Stage Ageing (vol 36, pg 456, 2023)" . | ACTA METALLURGICA SINICA-ENGLISH LETTERS 36 . 9 (2023) : 1572-1572 . |
| APA | Du, Baotian , Yu, Zijian , Shi, Kang , Liu, Ke , Li, Shubo , Du, Wenbo . Improving the Mechanical Properties of Mg-Gd-Y-Ag-Zr Alloy via Pre-Strain and Two-Stage Ageing (vol 36, pg 456, 2023) . | ACTA METALLURGICA SINICA-ENGLISH LETTERS , 2023 , 36 (9) , 1572-1572 . |
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Abstract ：
研究了CNTs的加入对Mg-9 Al镁基复合材料时效行为的影响,探讨了时效处理过程中微观组织、力学性能及导热性能的演变规律.结果表明:添加的CNTs增大了基体合金中铝元素的固溶度,并在时效过程中限制晶界的迁移,在二者共同作用下,促进基体中连续β-Mg17 Al12相的析出,且随着CNTs含量的增加,连续析出的比例增大;与基体呈共格关系的杆状连续析出相能够有效地阻碍位错运动,提高复合材料的力学性能,其中峰时效态0.4CNTs/Mg-9Al复合材料的屈服强度、抗拉强度、热扩散系数和热导率分别为275 MPa,369 MPa,34.5 mm2/s和68.4 W/(m·K),相较于时效前Mg-9Al合金分别提升了17％,23％,43％和45％.
Keyword ：
时效处理 时效处理 碳纳米管 碳纳米管 镁基复合材料 镁基复合材料 力学性能 力学性能 热导率 热导率
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| GB/T 7714 | 李淑波 , 侯江涛 , 孟繁婧 et al. CNTs/Mg-9Al复合材料微观组织、力学及导热性能 [J]. | 材料工程 , 2023 , 51 (1) : 26-35 . |
| MLA | 李淑波 et al. "CNTs/Mg-9Al复合材料微观组织、力学及导热性能" . | 材料工程 51 . 1 (2023) : 26-35 . |
| APA | 李淑波 , 侯江涛 , 孟繁婧 , 刘轲 , 王朝辉 , 杜文博 . CNTs/Mg-9Al复合材料微观组织、力学及导热性能 . | 材料工程 , 2023 , 51 (1) , 26-35 . |
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Abstract ：
To accelerate the commercial application of rechargeable aqueous Zn-air batteries, it is essential to develop effective catalysts for oxygen evolution reaction (OER). This work reports a novel nanohybrid catalyst comprising amorphous B doped Fe-Ni bimetal hydroxide nano-sheets supported on multiwalled carbon nano -tubes for high-efficiency Zn-air batteries, which was synthesized via a facile ultrasonic-assisted BH4- fast reduction reaction. The as-constructed nano-complex with optimal composition exhibited outstanding activity and stability for the OER process, with an overpotential of 219.43 mV for 10 mA cm-2 and a Tafel slope of 43.1 mV dec- 1. A fabricated Zn-air battery delivered both excellent energy efficiency and high cycling stability, exhibiting a peak power density of 343.7 mW cm-2 and a favorable stability of over 200 h. The enhanced battery performance demonstrates the nanohybrid to be a promising candidate catalyst for Zn-air batteries with low-cost, high efficiency and long-term stability.
Keyword ：
Oxygen evolution reaction Oxygen evolution reaction B doping B doping FeNi hydroxide FeNi hydroxide Carbon nanotube Carbon nanotube Zn-air battery Zn-air battery
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| GB/T 7714 | Zhao, Chenchen , Jin, Yuhong , Yu, Zijian et al. B doped NiFe hydroxides/multiwalled carbon nanotube electrocatalysts toward oxygen evolution reaction for rechargeable Zn-air batteries [J]. | MATERIALS CHEMISTRY AND PHYSICS , 2023 , 295 . |
| MLA | Zhao, Chenchen et al. "B doped NiFe hydroxides/multiwalled carbon nanotube electrocatalysts toward oxygen evolution reaction for rechargeable Zn-air batteries" . | MATERIALS CHEMISTRY AND PHYSICS 295 (2023) . |
| APA | Zhao, Chenchen , Jin, Yuhong , Yu, Zijian , Li, Shubo , Meng, Fanjing , Yuan, Yanping et al. B doped NiFe hydroxides/multiwalled carbon nanotube electrocatalysts toward oxygen evolution reaction for rechargeable Zn-air batteries . | MATERIALS CHEMISTRY AND PHYSICS , 2023 , 295 . |
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Abstract ：
对轧制态Mg-x Zn-0.5Er (x=0.5, 2.0,3.0, 4.0,质量分数，%)合金的腐蚀行为和机理进行研究。结果表明，第二相与基体之间的电位差由第二相的种类和尺寸决定。Mg-0.5Zn-0.5Er合金基体中占主导地位的纳米尺寸W相引起合金局部尖锐点蚀。但是，随着粗大W相或I相体积分数的增加，腐蚀反应优先在粗大W相或I相附近发生，腐蚀更加均匀，腐蚀速率加快。长期浸泡(14 d)结果表明，合金耐蚀性由高到低的顺序为Mg-0.5Zn-0.5Er>Mg-2.0Zn-0.5Er> Mg-3.0Zn-0.5Er> Mg-4.0Zn-0.5Er。
Keyword ：
第二相 第二相 镁合金 镁合金 腐蚀行为 腐蚀行为 显微组织 显微组织
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| GB/T 7714 | 刘轲 , 娄峰 , 付军健 et al. 轧制态Mg-Zn-Er合金板材的显微组织及腐蚀行为（英文） [J]. | Transactions of Nonferrous Metals Society of China , 2022 , 32 (06) : 1881-1895 . |
| MLA | 刘轲 et al. "轧制态Mg-Zn-Er合金板材的显微组织及腐蚀行为（英文）" . | Transactions of Nonferrous Metals Society of China 32 . 06 (2022) : 1881-1895 . |
| APA | 刘轲 , 娄峰 , 付军健 , 于子健 , 李淑波 , 王朝辉 et al. 轧制态Mg-Zn-Er合金板材的显微组织及腐蚀行为（英文） . | Transactions of Nonferrous Metals Society of China , 2022 , 32 (06) , 1881-1895 . |
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Abstract ：
通过浸泡实验和电化学测试研究了Mg-4.0Zn-0.2Mn-0.2Ca（质量分数）微细管的体外降解行为与腐蚀机理。结果表明，退火处理可以提高微细管的耐腐蚀性。长期浸泡实验表明腐蚀过程相对均匀，退火微细管在Hank's溶液中的腐蚀速率约为0.30 mm/a。在浸泡初期，退火管材表面生成Mg(OH)_2，形成保护膜，阻碍腐蚀进行。虽然Mg(OH)_2膜上形成的羟基磷灰石（HA）可以进一步降低腐蚀速率，但是镁基体中粗大的第二相会增强电偶腐蚀效应，并且生成的大量氢气，从而破坏HA膜，使腐蚀继续进行。
Keyword ：
镁微细管 镁微细管 腐蚀机理 腐蚀机理 腐蚀产物 腐蚀产物 Hank's溶液 Hank's溶液 腐蚀 腐蚀
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| GB/T 7714 | 付军健 , 杜文博 , 孙健 et al. 可降解血管支架用Mg-4.0Zn-0.2Mn-0.2Ca微细管的体外降解行为（英文） [J]. | 稀有金属材料与工程 , 2022 , 51 (05) : 1572-1581 . |
| MLA | 付军健 et al. "可降解血管支架用Mg-4.0Zn-0.2Mn-0.2Ca微细管的体外降解行为（英文）" . | 稀有金属材料与工程 51 . 05 (2022) : 1572-1581 . |
| APA | 付军健 , 杜文博 , 孙健 , Adil Mansoor , 刘轲 , 杜宪 et al. 可降解血管支架用Mg-4.0Zn-0.2Mn-0.2Ca微细管的体外降解行为（英文） . | 稀有金属材料与工程 , 2022 , 51 (05) , 1572-1581 . |
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Abstract ：
The ambient strength-ductility trade-off has been a long-standing dilemma in metallic alloys, in particular Mg alloys. Here we report a new strategy to solve such a strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition. Different from the strengthening of traditional beta ' phase in Mg-7Gd (wt%) alloy, 1 wt% Li addition to this alloy not only boosts the precipitation of different sized beta, beta(1R), beta(H-II)' phases and Li clusters to offer better combined strengthening effect, but also enhances the activity of < c+a > dislocations to accommodate the strains during plastic deformation. Consequently, both the ambient tensile yield strength and ductility are simultaneously improved as compared to Mg-7Gd (wt%) alloy. Moreover, Li addition brings a reduction in density, in turn increasing the specific yield strength. The present strategy with Li addition offers a new insight into the development of Mg alloys with high strength-ductility synergy and with high specific yield strength.
Keyword ：
Lithium Lithium Microstructure Microstructure Magnesium Magnesium Rare earth Rare earth Precipitation Precipitation
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| GB/T 7714 | Yu, Zijian , Huang, Yuanding , Liu, Linlin et al. New strategy to solve the ambient strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition [J]. | SCRIPTA MATERIALIA , 2022 , 220 . |
| MLA | Yu, Zijian et al. "New strategy to solve the ambient strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition" . | SCRIPTA MATERIALIA 220 (2022) . |
| APA | Yu, Zijian , Huang, Yuanding , Liu, Linlin , Shi, Kang , Du, Baotian , Liu, Ke et al. New strategy to solve the ambient strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition . | SCRIPTA MATERIALIA , 2022 , 220 . |
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Abstract ：
In this study, we investigated the microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr (GE61K) sheets. The results show that the rolling temperature has a remarkable influence on microstructures, age-hardening responses and mechanical properties of GE61K sheets. The microstructures varies with the increase in rolling temperatures, i.e. microstructures were dominated by the mixture of dynamic re-crystallized (DRXed) grains and un-DRXed grains at 300 degrees C, by DRXed grains at 350 degrees C, and by un-DRXed grains at 400 degrees C and 450 degrees C. Rolling at 300 degrees C leads to a formation of the bimodal microstructure which contains equilibrium Mg-5(Gd, Er) precipitates and a large number of dislocations. These dislocations leads to a formation of novel chain-like precipitates which comprise dominant beta', beta'(F) (or beta'(T)), tail-like "hexagonal ring" layers, individual "zig-zag" chain and individual "hexagonal ring", eventually improving age-hardening responses. The chain-like precipitates are beneficial for achieving a good strength-ductility balance by dividing the matrix into nano-scale units and forming subsequent honeycomb structures. As a result, the R-300 degrees C sheet shows good mechanical properties, i.e. ultimate tensile strength (UTS) of 367 +/- 3 MPa, yield strength (YS) of 349 +/- 4 MPa and elongation (EL) of 9.1 +/- 1.5%, respectively. However, such strength-ductility balance is destroyed sharply as soon as the rolling temperature increases to 400 degrees C because of the microstructure variations. (C) 2021 Elsevier B.V. All rights reserved.
Keyword ：
Mg-Gd-Er-Zr sheets Mg-Gd-Er-Zr sheets Mechanical properties Mechanical properties Age-hardening response Age-hardening response Precipitate chain Precipitate chain
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| GB/T 7714 | Liu, Ke , Lou, Feng , Yu, Zijian et al. Microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr alloy sheets produced with different rolling temperatures [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 893 . |
| MLA | Liu, Ke et al. "Microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr alloy sheets produced with different rolling temperatures" . | JOURNAL OF ALLOYS AND COMPOUNDS 893 (2022) . |
| APA | Liu, Ke , Lou, Feng , Yu, Zijian , Wang, Zhaohui , Li, Shubo , Du, Xian et al. Microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr alloy sheets produced with different rolling temperatures . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 893 . |
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Abstract ：
The present work focuses on the effects of rare earth (RE = Gd and Er) contents on the microstructural evolution and mechanical performance of Mg-Gd-Er-Zr alloys. Three different alloys, i.e., Mg-12Gd-2Er-0.4Zr, Mg-14Gd-1Er-0.4Zr, and Mg-14Gd-2Er-0.4Zr, are fabricated and subjected to double-pass extrusion. Incomplete dynamic recrystallization (DRX) resulted in a non-homogeneous grain structure with coarse and refined equiaxed grains during single-pass extrusion. In contrast, the grain size decreased dramatically after double-pass extrusion, and a high number of fine Mg5RE particles precipitated in the Mg-14Gd-2Er-0.4Zr alloy than the other two extruded alloys. Moreover, the Mg5RE particles larger than 1 mu m contributed to increase the DRX fraction, whereas the finer ones exerted a strong pinning effect on grain boundaries. The volume fraction of beta' precipitates increased with increasing RE content in the matrix. A large volume fraction of beta' precipitates in the alloy will primarily result in higher hardness and strength in the peak-aged condition. After peak-aging treatment, the double-pass extruded Mg-14Gd-2Er-0.4Zr alloy exhibited a good yield strength of 481 +/- 3.7 MPa and an adequate elongation of 3.2 +/- 0.6%. The influence mechanisms of grain refinement, fine particles, and the strengthening of beta' precipitates are discussed.
Keyword ：
Microstructure Microstructure Double-pass extrusion Double-pass extrusion Tensile properties Tensile properties Mg-Gd-Er-Zr alloys Mg-Gd-Er-Zr alloys Age hardening Age hardening
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| GB/T 7714 | Mansoor, Adil , Du, Wenbo , Yu, Zijian et al. Improved mechanical performance of double-pass extruded Mg-Gd-Er-Zr alloys with various rare earth contents [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 840 . |
| MLA | Mansoor, Adil et al. "Improved mechanical performance of double-pass extruded Mg-Gd-Er-Zr alloys with various rare earth contents" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 840 (2022) . |
| APA | Mansoor, Adil , Du, Wenbo , Yu, Zijian , Liu, Ke , Ding, Ning , Fu, Junjian et al. Improved mechanical performance of double-pass extruded Mg-Gd-Er-Zr alloys with various rare earth contents . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2022 , 840 . |
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