|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Fire and Corrosion Resistances of Intumescent Nano-coating Containing Nano-SiO_2 in Salt Spray Condition显示文摘The nano-concentrates and flame retardant nano-coating were prepared in thhis study. The effect of nano-SiO2 on the corrosion resistance and fire resistance of ammonium polyphosphate-pentaerythritol-melamine (APP-PER-MEL) coating was investigated by differential thermal analysis (DTA), scanning electron microscopy (SEM), effective thermal conductivity (λ/d), X-ray photoelectron spectroscopy (XPS) and fire protection test. The chemical action and endothermic effect of ammonium polyphosphate, pentaerythritol and melamine in traditional flame retardant coating were damaged by salt spray condition, whereas the flame-retardant additives in the nano-coating demonstrated the good chemical interaction in salt spray condition. The uniformly dispersed nano-SiO2 particles could improve corrosion resistance of the coating, and hence nano-coating could remain the good fire-resistant properties even after 500 h salt spray test. | Zhenyu Wang Enhou Han Fuchun Liu Wei Ke | 2010 | Journal of Materials Science & Technology2010，26，1： | 9 |
| 2 | Deformation and fracture mechanisms of an annealing-tailored 'bimodal' grain-structured Mg alloy显示文摘Through investigating and comparing the mechanical behavior of an as-rolled Mg-3%Al-1%Zn(wt%)alloy before and after annealing treatments,it was revealed that the formation of annealing-tailored bimodal grain structure ensured the 330℃/4 h samples having a good combination of tensile strength and plasticity.Failure analysis demonstrated that for the as-rolled and 330℃/1 h samples with fine grain structure,their plastic deformation was mainly attributed to basal slips,whereas the deformation mechanism in the bimodal grain-structured samples was dominated by basal slips in fine grains and twinning in coarse grains.For the 330℃/8 h samples with coarse grain structure,high densities of twins were activated.Meanwhile,basal slips occurred in the twinned and un-twinned areas of coarse grains and could pass through twin boundaries.For differently treated samples,cracking preferentially occurred along slip bands,resulting in their transgranular fractures. | Baojie Wang Daokui Xu Liyuan Sheng Enhou Han Jie Sun | 2019 | Journal of Materials Science & Technology2019，35，11： | 8 |
| 3 | Flaking and degradation of polyurethane coatings after 2 years of outdoor exposure in Lhasa显示文摘The exposure of a high gloss polyurethane aircraft topcoat system with polyurethane intermediate coating and epoxy primer to strong ultraviolet radiation in Lhasa,Tibet was studied by using scanning electron microscopy(SEM) ,atomic force microscopy(AFM) ,attenuated total reflectance Fourier-transform infrared(ATR-FTIR) ,and X-ray photoelectron spectroscopy(XPS) .Micro-flakes were found to form on the topcoat surface after exposure and the size and quantity of the flakes increased with the increase of the exposure time.The magnitude of micro-bulges and the topcoat roughness increased after a long exposure to sunlight. Flakes and micro-bulges resulted in the loss of the topcoat gloss.ATR-FTIR and XPS analysis indicated that chain scissions of the polyurea C==O group and the polyurethane C―O―C and CO―NH groups occurred,and the degradation products of NH and carbonyl groups formed due to the exposure.The breaking of the chemical structure of the polyurethane resulted in a decrease in its elasticity and in the adhesion of the flakes to its surface. | LIU FuChun HAO YongSheng WANG ZhenYu SHI HongWei HAN EnHou KE Wei | 2010 | Chinese Science Bulletin2010，55，7： | 7 |
| 4 | Corrosion of Artificial Aged Magnesium Alloy AZ80 in 3.5 wt pct NaCl Solutions显示文摘年老的镁合金 AZ80 的腐蚀形态学是调查 byimmersion 腐蚀测试,扫描电子显微镜学( SEM ),电气化学的 measurement.The T5 heattreatment 在一个真空炉子被执行,在 177 °C 为 16 h 成立,然后在 air.Theresults 冷却证明当一件年老的 AZ80 样品沉浸于 3.5 wtpct , intergranular 腐蚀( IGC )发生了 1 h 和狭窄的路径攻击的 NaCl 水的答案在谷物边界或 t 沿着 bulkbeta | Rongchang ZENG Enhou HAN Wei KE | 2007 | Journal of Materials Science & Technology2007，23，3： | 7 |
| 5 | Effects of trace Gd concentration on texture and mechanical properties of hot-rolled Mg-2Zn-xGd sheets显示文摘The effects of Gd concentration(0.1,0.3,0.7 wt%)on the microstructure,texture and mechanical properties of rolled and annealed Mg-2Zn-xGd sheets have been investigated aiming to develop low cost and high ductile Mg-Zn-Gd sheets.Dynamic recrystallization,static recrystallization and grain growth during hot rolling process and annealing process were delayed with increase of Gd concentration,leading to fine grain microstructure.The rolled 0.1 wt%Gd sheet showed strong basal texture which remained stable after annealing process and exhibited medium elongation of about 25%.In contrast,the rolled 0.3 wt%Gd sheet had weak basal texture which transformed to non-basal texture with double peaks tilted about±48°to the transverse direction due to the static recrystallization during annealing process.Consequently,the annealed sheets exhibited higher elongation of 40%along the rolling direction and 50%along the transverse direction due to the existence of non-basal texture.It is suggested that the minimum effective concentration for texture randomization in the Mg-2Zn-xGd alloy is about 0.3 wt%. | Hong Yan Rongshi Chen Nan Zheng Jun Luo Shigeharu Kamado Enhou Han | 2013 | Journal of Magnesium and Alloys2013，1，1： | 7 |
| 6 | First-principles calculations of the β'-Mg_7Gd precipitate in Mg-Gd binary alloys显示文摘The metastable β' phase is often the most effective hardening precipitate in Mg-Gd based alloys.In this paper,the structural,elastic and electronic properties of the recently identified β'-Mg7Gd precipitate in Mg-Gd binary alloys were investigated using first-principles calculations based on density functional theory.The lattice mismatches between the coherent β'-Mg7Gd precipitate and α-Mg matrix are discussed and used to rationalize the experimentally observed morphology of the precipitate.The mechanical properties were investigated through analysis of the single-crystal elastic constants and the polycrystalline elastic moduli.It is found that β'-Mg7Gd is brittle in nature.Strong covalent bonding in β'-Mg7Gd,as inferred from its electronic structure,further explains its mechanical properties.Our theoretical results show good agreement with experimental measurements. | GAO Lei ZHOU Jian SUN ZhiMei CHEN RongShi HAN EnHou | 2011 | Chinese Science Bulletin2011，56，11： | 7 |
| 7 | Effect of ZnO nanoparticles on anti-aging properties of polyurethane coating显示文摘Polyurethane nano-coatings were prepared by adding nano-concentrates with nanometer zinc oxide (nano-ZnO) to polyurethane coating. The dispersion state of nanoparticles was observed by TEM images. SEM observation and FT-IR analysis indicate that the nano-coating with 1% ZnO nanoparticles can retain better morphological structure than the nano-coating with 5% ZnO nanoparticles after 500 h accelerated aging. It is known from XPS analysis that the anti-oxidation properties of polyurethane coating are enhanced by 1% ZnO nanoparticles through the nano-network and destroyed by 5% ZnO nanoparticles due to the strong light catalysis. A small change in capacitances of nano-coatings with 1% ZnO nanoparticles before and after accelerated aging indicates that 1% ZnO nanoparticles improve the corrosion resistance of coating, while a large increase in capacitances of nano-coating with 5% ZnO nanoparticles before and after accelerated aging demonstrates that 5% ZnO nanoparticles damage the corrosion resistance of coating. | WANG ZhenYu LIU FuChun HAN EnHou KE Wei LUO SuZhen | 2009 | Chinese Science Bulletin2009，54，19： | 6 |
| 8 | Waterborne Epoxy Nanocoatings Modified by Nanoemulsions and Nanoparticles显示文摘Electrically conductive coatings are required for static charge dissipation in power ground network.In the present investigation electrically conductive nanocoatings were prepared by the incorporation of graphite,nano-SiO_2concentrate,acrylic nanoemulsion and fluorocarbon emulsion onto the waterborne epoxy polymer.The nanosize distribution of nano-SiO_2 concentrate and nanoemulsion was characterized with laser diffraction analyzer and scanning electron microscopy(SEM).From the results of SEM image,the graphite particles were well distributed in conductive coating.The corrosion resistance and thermal stability of nanocoatings were comparatively studied by SEM and thermogravimetry(TG).The corrosion-inhibiting properties of the conductive nanocoatings were investigated by salt immersion test.The measurements of contact angle,bonding strength and heat-freeze charge demonstrated that 1.5—2.0 wt%nanoparticles improve the resistance to pollution,adherence and resistance to heat-freeze charge of conductive nanocoatings.The measured results of surface electric resistance of nanocoatings demonstrated that a small amount of nanoSiO_2 particles could enhance the conductivity in the corrosive environment. | Zhenyu Wang Enhou Han Fuchun Liu Zhouhai Qian Liwei Zhu | 2014 | Journal of Materials Science & Technology2014，30，10： | 6 |
| 9 | Product/metal ratio (PMR):A novel criterion for the evaluation of electrolytes on micro-arc oxidation (MAO) of Mg and its alloys显示文摘Product/metal ratio (PMR) was introduced as a novel criterion for the evaluation of electrolytes on micro-arc oxidation (MAO) of Mg and its alloys. The criterion initially sprang from Pilling-Bedworth ratio (PBR), focused on the roles of electrolytes for the compactness of the fabricated coatings, and took attention on properties of reactants/products during MAO. Meanwhile, based on our experiments as well as the results from literatures, the effects of electrolyte additives on morphologies and com-positions of the fabricated MAO coatings of Mg alloys were exploited for verification and supplement of the initial criterion. In combination of the initial PMR criterion and experimental verification, PMR could be represented by special mode (PMRs=Voxide products/Valloy substrates) and general mode (PMRg= PMRs+ PMRd). The ideal PMRs should be between 1 and 2, while PMRd is related to the coating deposition during MAO. PMRd is a supplement to PMRs when the effect of the overlaying prop-erty (O) of the coatings and the effective deposition (D) of electrolyte composites are considered (PMRd=f(O, D). O is related to the melting point (MP) and boiling point (BP) of the MAO products. D is related to the effective reactions between alloy substrates and electrolytes during MAO. | SONG LaiWen SONG YingWei SHAN DaYong ZHU GuoYi HAN EnHou | 2011 | Science China(Technological Sciences)2011，54，10： | 6 |
| 10 | Electronic origin of the anomalous solid solution hardening of Y and Gd in Mg:A first-principles study显示文摘Y and Gd demonstrate anomalous solid solution hardening efficiency,which cannot be understood using the elastic impuritydislocation interaction theory.We performed first-principles calculations to investigate the effect of different alloying elements such as Al,Zn,Y,and Gd on the chemical bonding of Mg solid solutions.The present calculations clearly show that the anomalous solid solution hardening of Y and Gd in Mg may be understood based on the increased bonding strength of both Mg-Y (Gd) and Mg-Mg. | GAO Lei ZHOU Jian SUN ZhiMei CHEN RongShi HAN EnHou | 2011 | Chinese Science Bulletin2011，56，10： | 4 |
| 11 | EFFECTS OF STRESS RATIO AND FREQUENCY ON CORROSION FATIGUE CRACK GROWTH MECHANISM IN LOW ALLOY STEELS显示文摘Based on theoretical analysis about local strain,strain rate and dissolving rate at crack tip,the corrosion fatigue crack growth rate of steels ZG20SiMn and SM50B-Zc in fresh waterand 3.5% NaCl solution were measured experimentally,and the PH and electrode potentialwithin crack were also measured continuously along with crack propagating.It showed thatthe increase of crack growth rate,caused by both decreasing frequency and raising stressratio,was mainly accelerated by hydrogen embrittlement. | HAN Enhou HAN KYumei ZHENG Yuli KE Wei Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,China postdoctoral,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015,China | 1993 | Acta Metallurgica Sinica(English Letters)1993，6，6： | 4 |
| 12 | Thermal Behavior of Nano-TiO_2 in Fire-Resistant Coating显示文摘nano-TiO2 粒子的分散状态被使用传播电子显微镜学( TEM )和 Fourier 变换学习红外线的光谱学(英尺红外) .Nanoparticles 能被 nano-TiO2 的特定的 hyper-dispersant.The 改进充分在热行为和丙烯酸的聚合物的火焰延迟驱散,火抵抗的涂层被微分热分析( DTA )调查, thermogravimetry ( TG )和火抵抗的时间测试。它被表明 thatnano-TiC-2 对提高丙烯酸的聚合物和火抵抗的涂层的热稳定性,反氧化和 fire-resistantproperties 有用。 | Zhenyu WANG Enhou HAN Fuchun LIU Wei KE | 2007 | Journal of Materials Science & Technology2007，23，4： | 3 |
| 13 | A study on water absorption in freestanding polyurethane films filled with nano-TiO_2 pigments by capacitance measurements显示文摘The electrochemical impedance spectroscopy (EIS) was used to evaluate the water transport and dielectric properties of polyurethane films filled with nano-TiO2 at different pigment/base (P/B) values in 0.5 mol/L NaCl solutions. EIS results were compared with gravimetric measurements on the freestanding films. The amount of water absorption showed great discrepancy between the two methods. The diffusion coeffcient in the polyurethane film with P/B=30% was the smallest among those filled with nano-TiO2 pigments. The dielectric constant ε of the polyurethane varnish film obtained from the initial capacitance was in the range of typical values of polymers. SEM was used to measure the distribution of nano-TiO2 particles in the polyurethane films. | Mingcheng SUN Fuchun LIU Hongwei SHI Enhou HAN | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，1： | 3 |
| 14 | Effects of Nano Pigments on the Corrosion Resistance of Alkyd Coating显示文摘在醇酸树脂涂层的耐蚀性能上与 nano-TiO2 和 nano 颜料的 nano-ZnO 颜料 wereprepared.The 效果嵌入的醇酸树脂涂层我们用电气化学的阻抗光谱(EIS ) 的 reinvestigated。为比较的缘故,有常规 TiO2 和 ZnO 的醇酸树脂涂层的腐蚀保护也被学习。它被发现 thatnano-TiO2 颜料改进腐蚀抵抗以及在为腐蚀抵抗的有颜色的涂层的 nano-TiO2 的醇酸树脂 coatings.Theoptimal 数量的坚硬是有纳米 TiO2 和常规 TiO2 的醇酸树脂涂层的1% .The 粘性, ZnO 颜料被测量,在粘性和耐蚀性能之间的关系是讨论。 | Hongwei SHI Fuchun LIU Enhou HAN Yinghua WEI | 2007 | Journal of Materials Science & Technology2007，23，4： | 3 |
| 15 | Effect of Cu on Microstructures of Manganese Steel by EDXA and SEM显示文摘以便调查分发 Cu 和 Mg ,和钢的 Cu 在微观结构的效果,分别地,包含各种各样的 Cu 内容的锰钢是退火的 at1260,1100 和 1000 °C 在 thefurnace 为 1 h 并且随后冷却了到房间温度模仿结果显示的 pre-rolling anneal.The 那 Cu 不是在观察显示出的退火的 steels.The 扫描电子显微镜学( SEM )的 microscopicallysegregated 那 themain 微观结构由铁酸盐和珠泽铁组成; | Xinhua CHEN Junhua DONG Enhou HAN Wei KE | 2007 | Journal of Materials Science & Technology2007，23，3： | 2 |
| 16 | Superplasticity of Mg-5.8Zn-1Y-Zr alloy sheet fabricated by combination of extrusion and hot-rolling processes显示文摘Superplastic behaviors of quasicrystal phase containing Mg-5.8Zn-1Y-0.48Zr alloy sheets fabricated by combination of extrusion and hot-rolling processes have been investigated at temperature ranging from 623 to 753 K and at the strain rates ranging from 10-4 to 10-2 s-1 by uniaxial tensile tests. An excellent superplasticity with the maximum elongation to failure of 1020% was obtained at 753 K and the strain rate of 1.04×10-3 s-1 and its strain rate sensitivity, m, is as high as up to 0.75. The microstructure was stable during superplastic deformation due to the uniformly distributed fine quasicrystal particles. In addition, micro-cavities and their coalescences were observed in the superplastic deformation of the ZW61 magnesium alloy. Grain boundary sliding (GBS) was considered to be the main deformation mechanism during the superplastic deformation. Dislocation creep controlled by atom diffusion through grain boundaries or interior grains is suggested mainly to accommodate the GBS in super-plastic deformation. | YAN Hong CHEN RongShi HAN EnHou | 2009 | Science China(Technological Sciences)2009，52，1： | 2 |
| 17 | Local environment under simulated disbonded coating on steel pipelines in soil solution显示文摘 | Maocheng Yan Jianqiu Wang Enhou Han Wei Ke | 2008 | Corrosion Science2008，，5： | 2 |
| 18 | Electroplating zinc transition layer for electroless nickel plating on AM 60 magnesium alloys 显示文摘 | WANG Xiaomin ZHOU Wanqiu HAN Enhou | 2006 | Transactions of Nonferrous Metals Society of China2006，16，： | 1 |
| 19 | Structure and formation mechanism of phosphate conversion coating on die-cast AZ91D magnesium alloy 显示文摘 | Zhou Wanqiu Shan Dayong Han Enhou | 2008 | Corrosion Science2008，50，2： | 1 |
| 20 | 显示文摘 | Wang Zhenyu Han Enhou Ke Wei | 2006 | Surface and Coatings Technology2006，200，2021： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员