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| 1 | Study on Steel-Mushy Al-20Sn Alloy Bonding显示文摘Steel-mushy Al-20Sn alloy bonding was studied for the first time. The relationship model about preheat temperature of steel plate, solid fraction of Al-20Sn alloy mushy, rolling speed and interfacial shear strength of bonding plate could be established by artificial neural networks perfectly. This model could be optimized with a genetic algorithm. The optimum bonding parameters were: 505’C for preheat temperature of steel plate, 34.3% for solid fraction of Al20Sn alloy musry and 10 mm/s for rolling speed, and the largest interfacial shear strength of bonding plate was 71.2 MPa. | Peng ZHANG, Yunhui DU and Daben ZENG Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China Jianzhong CUI Metal Forming Department, NEU, Shenyang 110006, China Limin BA Anshan Automobile Fittings Factory, Anshan 114014, China | 2001 | Journal of Materials Science & Technology2001，17，2： | 7 |
| 2 | Semi-solid Processing of Al-7Graghite Composite显示文摘Al-7graphite composite was processed using Al-7graphite mushy prepared by electromagnetic-mechanical stirring method, and the influence of solid fraction on the distributing of graphite particles in ingot was studied. The results shows that the relationship between solid fraction and stirring temperature of mushy is:fs=591.5-0.897 t(wherefs is the solid fraction, t is the stirring temperature). For Al-7graphite composite, with the increasing of solid fraction, the aggregation extent of graphite particles reduced gradually, and when solid fraction was larger than 30%, graphite particles could distribute evenly in ingot. | Peng Zhang, Yunhui Du, Daben Zeng Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China | 2001 | Journal of University of Science and Technology Beijing2001，8，3： | 4 |
| 3 | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries显示文摘Iron hexacyanoferrate(FeHCF)is a promising cathode material for sodium-ion batteries.However,FeHCF always suffers from a poor cycling stability,which is closely related to the abundant vacancy defects in its framework.Herein,post-synthetic and in-situ vacancy repairing strategies are proposed for the synthesis of highquality FeHCF in a highly concentrated Na_(4)Fe(CN)_(6) solution.Both the post-synthetic and in-situ vacancy repaired FeHCF products(FeHCF-P and FeHCF-I)show the significant decrease in the number of vacancy defects and the reinforced structure,which can suppress the side reactions and activate the capacity from low-spin Fe in FeHCF.In particular,FeHCF-P delivers a reversible discharge capacity of 131 mAh g^(−1) at 1 C and remains 109 mAh g^(−1) after 500 cycles,with a capacity retention of 83%.FeHCF-I can deliver a high discharge capacity of 158.5 mAh g^(−1) at 1 C.Even at 10 C,the FeHCF-I electrode still maintains a discharge specific capacity of 103 mAh g^(−1) and retains 75% after 800 cycles.This work provides a new vacancy repairing strategy for the solution synthesis of high-quality FeHCF. | Min Wan Rui Zeng Jingtao Meng Zexiao Cheng Weilun Chen Jiayu Peng Wuxing Zhang Yunhui Huang | 2022 | Nano-Micro Letters2022，14，1： | 3 |
| 4 | Facile synthesis of Li2S@C composites as cathode for Li–S batteries显示文摘Lithium sulfide (Li2S) provides a promising route for lithium storage due to high theoretical specific capacity (1166 mAh g-1). The electrochemical performance of Li2S can be significantly enhanced by forming Li2S-carbon composites with the introduction of carbon. However, the complex synthesis method of Li2S-carbon composites restrains the large-scale productivity. Herein, we propose a facile route to prepare carbon coated Li2S-carbon nanotube composites (Li2S@C-CNT) via spray drying and heat treatment, which is a low-cost and large-scale method for facile synthesis of Li2S-carbon composites. For the Li2S@C-CNT composites, Li2S nanoparticles are contacted with surrounding particles due to the 3D CNTs framework. The novel construction not only suppresses the diffusion of polysulfides during cycling, but also remarkably accelerates the transport of electron and ion, resulting in a high specific capacity (1100 mAh g^-1) and good cycling performance. The rational designed architecture and good electrochemical performance of Li2S@C-CNT will pave the avenue for realizing high energy density of Li2S-based batteries. | Xin Chen Linfeng Peng Lixia Yuan Rui Zeng Jingwei Xiang Weilun Chen Kai Yuan Jie Chen Yunhui Huang Jia Xie | 2019 | Journal of Energy Chemistry2019，28，10： | 1 |
| 5 | Evaluation of Ca_3(Co,M)_2O_6(M=Co, Fe, Mn, Ni) as new cathode materials for solid-oxide fuel cells显示文摘Series compounds Ca_3(Co_(0.9)M_(0.1))_2O_6(M = Co,Fe,Mn,Ni) with hexagonal crystal structure were prepared by sol-gel route as the cathode materials for solid oxide fuel cells(SOFCs).Effects of the varied atomic compositions on the structure,electrical conductivity,thermal expansion and electrochemical performance were systematically evaluated.Experimental results showed that the lattice parameters of Ca_3(Co_(0.9)Fe_(0.1))_2O_6and Ca_3(Co_(0.9)Mn_(0.1))_2O_6 were both expanded to certain degree.Electron-doping and hole-doping effects were expected in Ca_3(Co_(0.9)Mn_(0.1))_2O_6and Ca_3(Co_(0.9)Ni_(0.1))_2O_6 respectively according to the chemical states of constituent elements and thermal-activated behavior of electrical conductivity.Thermal expansion coefficients(TEC) of Ca_3(Co_(0.9)M_(0.1))_2O_6 were measured to be distributed around 16×10^(-6)K^(-1) and compositional elements of Fe,Mn,and Ni were especially beneficial for alleviation of the thermal expansion problem of cathode materials.By using Ca_3(Co_(0.9)M_(0.1))_2O_6 as the cathodes operated at 800 ℃,the interfacial area-specific resistance varied in the order of M = Co < M = Fe < M = Ni < M = Mn,and the over-potential increased in the order of M = Fe ≈ M = Co < M = Mn < M = Ni.Among all of these compounds,Ca_3(Co_(0.9)Fe_(0.1))_2O_6 showed the best electrochemical performance and the power density as high as ca.500 mW cm^(-2) at800 ℃ achieved in the single cell with La_(0.8)Sr_(0.2)Ga_(0.83)Mg_(0.17)O_(2.815) as electrolyte and Ni-Ce_(0.8)Sm_(0.2)O_(1.9) as anode.Ca_3(Co_(0.9)M_(0.1))_2O_6(M = Co,Fe,Mn,Ni) can be used as the cost-effective cathode materials for SOFCs. | Fushao Li Long Jiang Rui Zeng Tao Wei Yingxian Xu Fan Wang Yunhui Huang | 2015 | Progress in Natural Science:Materials International2015，25，5： | 1 |
| 6 | Detection of phenylhydrazine based on lectin-glycoenzyme multilayer-film modified biosensor显示文摘 | TANG Lin ZENG Guangming YANG Yunhui | 2005 | Int J Environ Anal Chem2005，85，2： | 1 |
| 7 | Study on steel-al-20Sn nonhomogeneous diffusion bonding显示文摘 | ZHANG Peng DU Yunhui ZENG Daben | 2002 | Acta Material Composite Sinica2002，，1： | 1 |
| 8 | Light‐controlled astrocytes promote human mesenchymal stem cells toward neuronal differentiation and improve the neurological deficit in stroke rats显示文摘 | Jie Tu Fan Yang Jun Wan Yunhui Liu Jie Zhang Bifeng Wu Yafeng Liu Shaoqun Zeng Liping Wang | | Glia0，，1： | 1 |
| 9 | OSCILLATION OF A SECOND-ORDER HALF-LINEAR NEUTRAL DAMPED DIFFERENTIAL EQUATION WITH TIME-DELAY显示文摘In this paper,the oscillation for a class of second-order half-linear neutral damped differential equation with time-delay is studied.By means of Yang-inequality,the generalized Riccati transformation and a certain function,some new sufficient conditions for the oscillation are given for all solutions to the equation. | Yunhui Zeng(Dept.of Math.and Computational Science,Hengyang Normal University,Hengyang 421008,Hunan) | 2012 | Annals of Differential Equations2012，28，3： | 1 |
| 10 | Rheologic behaviors of A356 aluminum alloy billet produced by semisolid continuous casting process显示文摘The experiments for rheologic behaviors of semisolid continuous casting billets of A356 alloy in semisolid state had been carried out with a multifunctional rheometer. The results show that the deformation rate increases with loading time, the maximum strain reaches to 120% (which is one time larger than that of traditional mold casting billet) and the strain can be rapidly eliminated to 10% after unloading. Moreover, there is a critic stress for billet deformation even in semisolid state, which is named as critic shear stress. This stress increases with the decreasing of heating time. The theologic behaviors can be expressed by five elements mechanical model (H2- [N1|H2]-[N2|S]) and can be modified with the increasing of heating time. | Shuming Xing Lizhong ZHANG Yunhui DU Daben ZENG Jinlin TANG | 2004 | China Foundry2004，1，1： | 1 |
| 11 | Positive periodic solutions for impulsive functional differenti-al equations with infinite delay and two parameters显示文摘 | LUO Zhenguo LUO Liping ZENG Yunhui | 2014 | Journal of Applied Mathematics2014，75，： | 1 |
| 12 | Effect of Relative Reduction on Property of Steel-Mushy Cu-Graphite Composite显示文摘The rolling treatment of steel-mushy QTi3.5-3.5 graphite composite was conducted under different relative reduction at room temperature. The effect of room-temperature rolling on interfacial mechanical property of steel-mushy QTi3.5-3.5 graphite composite was studied and the relationship between interfacial shear strength and relative reduction was established. The results show that, for steel-mushy QTi3.5-3.5 graphite composite, which consists of 1.2 mm-thick 08Al steel plate and 2.8 mm-thick QTi3.5-3.5 graphite layer, there is a nonlinear relationship between interfacial shear strength and relative reduction in graphite layer. When relative reduction is smaller than 1.1%,interfacial shear strength increases with increasing the relative reduction. When relative reduction is larger than 1.1%, interfacial shear strength decreases with increasing the relative reduction. When relative reduction is 1.1%,the largest interfacial shear strength of 145.2 MPa can be obtained. | Peng ZHANG Yunhui DU Hanwu LIU Daben ZENG Jianzhong CUI Limin BA | 2005 | Journal of Materials Science & Technology2005，21，4： | 0 |
| 13 | Influence of Pressing Time on Steel-copper-graphite Bonding显示文摘与 QTi3.5-3.5 石墨泥浆钢板结合被使用紧迫的结合的技术学习。在结合的板的界面的机械性质上压时间的影响被研究。结果显示出那:在钢板的 620 deg Cpreheating 温度的条件下面, 530 deg C 预热温度死, QTi3.5-3.5 石墨泥浆的 46% 稳固的部分和 50 MPa 迫使,在那里存在在压时间之间的一种非线性的关系并且界面砍力量。界面砍结合的板的力量与增加紧迫的时间增加并且到达最大的价值大约 127 MPa 当压时,时间比 120 s 长。在最好的机械性质的接口,在那里存在一个连续 Fe-Cu 内部散开的地区并且冶金的结合。 | Peng ZHANG Yunhui DU Hanwu LIU Jun ZHANG Daben ZENG Jianzhong CUI Limin BA | 2006 | Journal of Materials Science & Technology2006，22，2： | 0 |
| 14 | Facile ball-milled synthesis of SnS2-carbon nanocomposites with superior lithium storage显示文摘A facile high-energy ball-milling method was developed to synthesize SnS_2-carbon(SnS_2/C-x(x = 40, 50, 60 wt%)) nanocomposites. The results showed that as anode materials for lithium-ion batteries(LIBs), the SnS_2-C nanocomposites exhibited high discharge capacity and excellent cycling stability. For the optimized SnS_2/C-50 wt% nanocomposite, a discharge capacity as high as 700 mA h g^(-1) and the initial coulombic efficiency of 80.8% were achieved at a current density of 100 mA g^(-1). The unique structure with SnS_2 nanoparticles(NPs)embedded into carbon network provided abundant Li-ion storage sites, high electronic conductivity and fast ion diffusion. The ball-milled synthesis is applicable for large-scale preparation of new sulfide-based anode materials with good performance for LIBs. | Haihua Zhao Hong Zeng Ying Wu Wen Qi Shengen Zhang Bo Li Yunhui Huang | 2018 | Progress in Natural Science:Materials International2018，28，6： | 0 |
| 15 | Stable all-solid-state Li-Te battery with Li_(3)TbBr_(6) superionic conductor显示文摘Rare-earth(RE)halide solid electrolytes(HSEs)have been an emerging research area due to their good electrochemical and mechanical properties for all-solid-state lithium batteries(ASSBs).However,only very limited types of HSEs have been reported with high performance.In this work,tens of grams of RE-HSE Li_(3)TbBr_(6)(LTbB)was synthesized by a vacuum evaporationassisted method.The as-prepared LTbB displays a high ionic conductivity of 1.7 mS·cm^(-1),a wide electrochemical window,and good formability.Accordingly,the assembled solid lithium-tellurium(Li-Te)battery based on the LTbB HSE exhibits excellent cycling stability up to 600 cycles,which is superior to most previous reports.The processes and the chemicals during the discharge/charge of Li-Te batteries have been studied by various in situ and ex situ characterizations.Theoretical calculations have demonstrated the dominant conductivity contributions of the direct[octahedral]-[octahedral]([Oct]-[Oct])pathway for Li ion migrations in the electrolyte.The Tb sites guarantee efficient electron transfer while the Li 2s orbitals are not affected during migration,leading to a low activation barrier.Therefore,this successful fabrication and application of LTbB have offered a highly competitive solution for solid electrolytes in ASSBs,indicating the great potential of RE-based HSEs in energy devices. | Zhichao Zeng Xiaomeng Shi Mingzi Sun Hongtu Zhang Wei Luo Yunhui Huang Bolong Huang Yaping Du Chun-Hua Yan | 2023 | Nano Research2023，16，7： | 0 |
| 16 | Study on Bonding of Steel-mushy Al-7graphite显示文摘The bonding of steel-mushy Al-7graphite was studied. The relationship between interfacial shear strength of bonding plate and solid fraction of Al-7graphite mushy was obtained, and the interfacial structure of bonding plate was determined. The results showed that: under the condition of 500℃ for preheat temperature of steel plate and 10mm/s for rolling speed, the largest interfacial shear strength of bonding plate was 70.1 MPa when solid fraction of Al-7graphite mushy was 34.6%. | Peng Zhang, Yunhui Du, Daben Zeng Department of Mechanical Engineering Tsinghua University. Beijing 100084, China | 2001 | Journal of University of Science and Technology Beijing2001，8，4： | 0 |
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