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  • Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions
  • 镁 AZ91 合金裂开的腐蚀和压力腐蚀上的氢的效果在水的答案被调查了。腐蚀在水里生产的氢扩散进,并且与 Mg 矩阵反应形成氢化物。一些氢在 hydride/Mg 矩阵积累(或第二等的阶段) 与 Mg 矩阵作为慢氢化物形成的后果和氢化物的不兼容连接(或第二等的阶段) ,并且联合形成分子的氢。这在 hydride/Mg 矩阵导致一个本地压力的开发(或第二等的阶段) 接口。扩大压力在氢化物的易碎的骨折由于它的累积结果由氢化物形成和本地氢压力引起了。这二联合效果甚至当外部负担不在时支持 AZ91 合金,和裂缝开始和繁殖的腐蚀率。氢吸收在 AZ91 合金的机械性质导致戏剧的恶化,显示氢 embrittlement 负责 transgulanar 压力腐蚀在水的答案裂开。
  • Water-Lubricated Ni-Based Composite (Ni-Al2O3, Ni-SiC and Ni-ZrO2) Thin Film Coatings for Industrial Applications
  • In this work,pure nickel and Ni-based nanocomposite coatings(N1-Al2O3,Ni-SiC and Ni-ZrO2) were produced on steel substrate by using pulse electrodeposition technique.The industrial performance tests were conducted to evaluate the wear resistance,corrosion resistance,adhesion strength and wettability behaviour of newly developed coatings.Rolling contact ball-on-disc tribometer was used to assess anti-wear behaviour of these coatings under waterlubricated contacts.The results showed that the wear- and corrosion resistance properties of nickel alumina and Ni-SiC composite coatings significantly improved than that of pure Ni and Ni-ZrO2 coatings.The adhesion and wettability results of Ni-Al2O3 composite showed better performance when compared to the rest of the coatings.The effects of incorporating nanoparticles on the surface microstructure,interface adhesion and distribution of the particles were also investigated.The coatings were characterized by using scanning electron microscopy,X-ray diffraction analysis and 3D white light interferometry.The wear failure behaviour of these coatings was further examined by post-test surface observation under optical microscope.
  • Synthesis and Characterization of C-TiO2/FeTiO3 and CQD/ C-TiO2/FeTiO3 Photocatalysts with Enhanced Photocatalytic Activities Under Sunlight Irradiation
  • Sunlight-driven C-TiO2/FeTiO3 composites were synthesized with different weight fractions of FeTiO3.The as-prepared samples were characterized by UV-Visible diffuse reflectance spectroscopy,Fourier transform infrared spectroscopy,X-ray diffraction analysis,transmission electron microscopy,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and photoluminescence.Under sunlight irradiation,the C-TiO2/FeTiO3 photocatalysts degraded methyl orange(MO) efficiently and displayed much higher photocatalytic activity than that of pure FeTiO3 or carbon-doped titanium dioxide(C-TiO2),and the C-TiO2/FeTiO3 photocatalyst with 10 wt%of FeTiO3 exhibited the highest photocatalytic activity.The enhancement of photocatalytic activity was mainly ascribed to the formation of a heterojunction between C-TiO2 and FeTiO3,which facilitated the transfer and separation of photogenerated electron-hole pairs.The quenching effects of different scavengers demonstrated that the reactive superoxide radicals(O2-) and hydroxyl radicals(OH) played a major role in the MO degradation.The possible photocatalytic mechanism is discussed on the basis of the band structures of C-TiO2 and FeTiO3.To further enhance the photocatalytic efficiency,double-heterojunctioned CQD/C-TiO2/FeTiO3 composite was prepared by loading carbon quantum dots onto the C-TiO2/FeTiO3 surface.
  • 3D Morphology and Formation Process of the Icosahedral Quasicrystalline Phase in Rapidly Solidified Al-Mn Alloy
  • Three-dimensional morphology and formation process of icosahedral quasicrystal phase have been investigated in a melt-spun Al-18 Mn alloy(in wt%).Three distinct layers corresponding to varying temperature gradient have been observed on the cross section of the ribbons.3D morphologies of cellular and dendritic icosahedral phase have been obtained through electro-etching.A model has been proposed to describe the formation process of the icosahedral phase and α-Al during the rapid solidification.The icosahedral phases are primarily precipitated from the melt into fine cellular and dendritic particles,and subsequently engulfed by the α-Al which propagates in a planar morphology.
  • Effect of Precipitated Phases on Corrosion of Mg95.8Gd3Zn1Zro.2 Alloy with Long-Period Stacking Ordered Structure
  • Microstructure Modification of Powder Compact of Al-Zn-Mg Nanostructured Alloy by a Semisolid Thermomechanical Processing
  • A thermomechanical process(TMP) consisting of three cycles of cold pressing at 154 MPa and liquid-phase sintering at 600 ℃ for 30 min in each cycle was applied to modify the microstructure of nanostructured Al-Zn-Mg alloy.The alloy powders were produced by mechanical alloying.Also,solid-state sintering at 550 ℃ for 90 min was done to compare the results with those obtained from the TMP.The powders and the thermomechanically(TM) processed samples were analyzed by XRD to reveal the present phases in addition to calculating the crystallite size changes by the Williamson-Hall method.Moreover,scanning electron microscope was employed to observe the morphology of the powder and the microstructures of the sintered and the TM processed samples.The results revealed that the TMP affected the microstructure noticeably as well as the microhardness by removing the continuous grain boundary porosities and uniform distribution of the intermetallic phase particles as well as obtaining a near globular microstructure after the second cycle.Also,the average grain sizes in the first and the second cycles of the TMP were lower than those of the sintered sample.Furthermore,nanocrystalline grains were stable up to the second cycle of the TMP.
  • Localized Corrosion of Binary Mg-Ca Alloy in 0.9 wt% Sodium Chloride Solution
  • To further understand the localized corrosion of magnesium alloy,various in situ electrochemical techniques and ex situ electron microprobe analysis and SEM were used to monitor the corrosion process of Mg-l.OCa alloy in0.9 wt%sodium chloride solution.The results indicated that the localized corrosion was accompanied by the formation and thickening of a corrosion product film on the Mg-l.OCa alloy.A localized corrosion of the alloy initiated selectively on the eutectic micro-constituent zones,then enhanced with the exposure,developed in depth with ring-shaped corrosion products accumulated around and finally formed a volcanic-like pitting.Based on the measurements,an electrochemical corrosion model was proposed accordingly to describe the formation mechanism of the volcanic-like pitting on the alloy in 0.9 wt%sodium chloride solution.
  • Effects of Nano-Y2O3 and Sintering Parameters on the Fabrication of PM Duplex and Ferritic Stainless Steels
  • 这里,我们报导 nano-Y 2 O 3 增加, sintering 空气和时间在期间在由元素的 Fe, Cr 和 Ni 的双开车的行星的 milling 的下午双、以铁酸盐为主要成的不锈钢 composites 的制造上,粉末由常规无压力的 sintering 列在后面。没有氧化钇、分散氧化钇的双、以铁酸盐为主要成的不锈钢被常规 sintering 在 1000, 1200 和 1400 点制作吗??
  • Limited Effect of Twin Boundaries on Radiation Damage
  • 洞形成上的一般谷物边界和成双的边界的不同影响在铜被调查在房间温度由氦照耀。有比 5 小的尺寸的洞的大数字 ? 在照耀以后形成的 nm,它是几乎同质地在内散布了谷物。然而,洞的分发在一般谷物边界和成双的边界附近变化了。弄空洞的地区乐意地在一般谷物边界附近被观察,它很少在成双的边界附近被观察。同时,在谷物边界飞机以内的稠密的洞的装饰被观察。当点缺点与一般谷物边界相比下沉,结果建议了成双的边界的有限影响。
  • Substrate Temperature-Dependent Physical Properties of Thermally Evaporated Sn4Sb6S13 Thin Films
  • 在这个工作, sulfosalt Sn 4 Sb 6 S 13 被热蒸发技术成功地综合到 7059 玻璃底层在 30200 的范围在各种各样的温度加热了的 corning 上 ??????(
  • Oxidation and Electrochemical Behavior of Monolayer- Graphene-Coated Copper in Simulated Primary Water
  • 在高温度、高压的水里,传统的耐蚀途径不是合适的被用来保护结构的材料免受氧化和腐蚀的伤害。在这研究,单层 graphene 作为一个障碍被探索保护材料免受降级的伤害。monolayer-graphene-coated 铜的氧化和腐蚀率比赤裸的铜的低得多,建议单层 graphene 罐头有效地保护铜免受密封的水反应堆的模仿的主要的水里的氧化和腐蚀的伤害。
  • Complex Precipitation Sequences of Al-Cu-Li-(Mg) Alloys Characterized in Relation to Thermal Ageing Processes
  • The Al-Cu-Li-(Mg) alloy is a high-performance lightweight material strengthened by complex coexisting precipitates that form in the alloy upon thermal ageing.Using high-resolution(scanning) transmission electron microscopy in association with first-principles energy calculations,we systematically studied the complex coexisting precipitates in the alloys and correlated their precipitation sequences with thermal ageing processes applied.The principal results are the following:(1) eight types of precipitates can be observed in the alloy;(2) of these precipitates,the T1-phase is most stable.The S-phase precipitates with segregated Li atoms at their interfacial edges are unexpectedly more stable than the σ-phase;(3) the T1-phase has a characteristic precursor that plays the key role in its nucleation and growth.
  • Effect of Hydrogen on Corrosion and Stress Corrosion Cracking of AZ91 Alloy in Aqueous Solutions(Jian Chen[1,2];Jian-Qiu Wang;En-Hou Han;Wei Ke;D. W. Shoesmith[1,2])
    Water-Lubricated Ni-Based Composite (Ni-Al2O3, Ni-SiC and Ni-ZrO2) Thin Film Coatings for Industrial Applications(Rizwan Sarwar Bajwa;Zulfiqar Khan;Vasilios Bakolas;Wolfgang Braun)
    Synthesis and Characterization of C-TiO2/FeTiO3 and CQD/ C-TiO2/FeTiO3 Photocatalysts with Enhanced Photocatalytic Activities Under Sunlight Irradiation(Ramakrishna Dadigala;Bhagavanth Reddy Gangapuram;Rajkumar Bandi;Ayodhya Dasari;Veerabhadram Guttena)
    3D Morphology and Formation Process of the Icosahedral Quasicrystalline Phase in Rapidly Solidified Al-Mn Alloy(Hui-Jun Kang;Zhong-Lue Hu;Xiao-Xia Gao;Zong-Ning Chen;Yi-Ping Lu;Jin-Chuan Jie;Jing-Jie Guo)
    Effect of Precipitated Phases on Corrosion of Mg95.8Gd3Zn1Zro.2 Alloy with Long-Period Stacking Ordered Structure(Xi-Mei zong[1,2,3];Dan Wang[1,2];Wei Liu[1,2];Kai-Bo Nie[1,2];Chun-Xiang Xu[1,2];Jin-Shan Zhang[1,2])
    Microstructure Modification of Powder Compact of Al-Zn-Mg Nanostructured Alloy by a Semisolid Thermomechanical Processing(Mohsen Hajizamani;Mostafa Alizadeh;Seyed Ahmad Jenabali-Jahromi)
    Localized Corrosion of Binary Mg-Ca Alloy in 0.9 wt% Sodium Chloride Solution(Rui-Qing Hou;Chen-Qing Ye;Cheng-Dong Chen;Shi-Gang Dong;Miao-Qiang Lv;Shu Zhang;Jin-Shan Pan;Guang-Ling Song;Chang-Jian Lin)
    Effects of Nano-Y2O3 and Sintering Parameters on the Fabrication of PM Duplex and Ferritic Stainless Steels(R. Shashanka;D. Chaira)
    Limited Effect of Twin Boundaries on Radiation Damage(Jin Gao;Zhi-Jun Liu;Fa-Rong Wan)
    Substrate Temperature-Dependent Physical Properties of Thermally Evaporated Sn4Sb6S13 Thin Films(A. Harizi;M. Ben Rabeh;M. Kanzari)
    Oxidation and Electrochemical Behavior of Monolayer- Graphene-Coated Copper in Simulated Primary Water(Hong-Liang Ming;Si-Yan Wang;Zhi-Ming Zhang;Jian-Qiu Wang;En-Hou Han;Wei Ke)
    Complex Precipitation Sequences of Al-Cu-Li-(Mg) Alloys Characterized in Relation to Thermal Ageing Processes(Zhen Gao;Jiang-Hua Chen;Shi-Yun Duan;Xiu-Bo Yang;Cui-Lan Wu)
    《金属学报:英文版》封面

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