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电场均匀化对2091Al-Li合金时效过程中第二相析出的影响 被引量:7
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作者 刘伟 崔建忠 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 1997年第1期31-34,共4页
研究了2091Al-Li合金的电场均匀化对显微结构的影响。结果表明:强电场加速了Al-Li合金的均匀化,提高了合金元素的固溶程度,诱发了T1相的均匀形核,提高了合金的屈服强度;对联合均匀化处理的样品进行应变时效处理后... 研究了2091Al-Li合金的电场均匀化对显微结构的影响。结果表明:强电场加速了Al-Li合金的均匀化,提高了合金元素的固溶程度,诱发了T1相的均匀形核,提高了合金的屈服强度;对联合均匀化处理的样品进行应变时效处理后,析出相均匀弥散分布,合金的力学性能大大提高。 展开更多
关键词 电场均匀化 铝锂合金 应变时效处理 析出相
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一种先进的±550 kV高压直流GIS及其潜在应用 被引量:8
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作者 李德军 刘志民 +2 位作者 KOSSE M KUSCHEL M JUHRE K 《高压电器》 CAS CSCD 北大核心 2020年第6期32-41,共10页
全球能源市场的变化如电能生产和用电负荷区域分布的变化、陆上及海上风能发电的增长促使高压直流输电和变电技术的进一步应用,变电站、换流站以及不同传输介质之间的转换站采用紧凑的直流气体绝缘开关(DC GIS)技术方案越来越多地成为... 全球能源市场的变化如电能生产和用电负荷区域分布的变化、陆上及海上风能发电的增长促使高压直流输电和变电技术的进一步应用,变电站、换流站以及不同传输介质之间的转换站采用紧凑的直流气体绝缘开关(DC GIS)技术方案越来越多地成为最佳选择。与交流系统相比,直流GIS的绝缘系统有一些特殊性,如绝缘子表面电荷积聚现象、电导率对电荷积聚的影响、温度对电导率的影响、这些因素对电场强度分布的影响等。基于这些考虑,优化了绝缘系统的场强分布,设计了用于电压等级达±550 kV、额定电流高达5000 A的直流GIS的新型环氧树脂绝缘子和隔离开关等必备功能模块。此外还讨论了引入电场均匀化材料(FGM)来进一步改善电场分布的可行性。具有典型功能模块配置的直流GIS通过了专门的介电性能试验、热电性能和机械性能试验,以及国际大电网会议CIGRE推荐的绝缘系统试验等。这项技术将用于德国计划中的南北直流输电线路的变电站。 展开更多
关键词 直流GIS 高压直流输电 绝缘子 表面电荷 电场强度分布 电场均匀化材料(FGM) 开关功能模块
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Movement of dispersed droplets of W/O emulsion in a uniform DC electrostatic field: Simulation on droplet coalescence 被引量:5
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作者 张军 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第9期1453-1459,共7页
Considering the droplet coalescence, the motion of a group of dispersed droplets in W/O emulsion in a DC electric field is simulated. The simulation demonstrates the evolutions of droplet number, size as well as its d... Considering the droplet coalescence, the motion of a group of dispersed droplets in W/O emulsion in a DC electric field is simulated. The simulation demonstrates the evolutions of droplet number, size as well as its distribution,local concentration distribution and droplet size-velocity relation with the applied time of electric field. The simulated average droplet size is roughly consistent with the experimental value. The simulated variation of droplet number with time under several applied voltages shows that increasing voltage is more effective for raising the rate of droplet coalescence than extending exerting time. However, with the further raise of applied voltage, the improvement in droplet coalescence rate becomes less significant. The evolution of simulated droplet size–velocity relationship with time shows that the inter-droplet electric repulsion force is very strong due to larger electric charge on the droplet under higher applied voltage, so that the magnitude and the direction of droplet velocity become more random, which looks helpful to droplet coalescence. 展开更多
关键词 DC electrostatic dehydration Droplet coalescence Droplet dynamics Simulation
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A New Approach to Explaining the Oscillatory Oxidation of Arsenites, Stibnites and Vismutinites Using Magnetic Method
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作者 Aibassov Erkin Zhakenovlch Yemelyanova Valentina Stepanovna Shakieva Tatyana Vladimirovna Tussupbaev Nesipbay Kuandykovich Imanbaev Klysh Bulenbayev Maxat Zhumabaevich 《Journal of Chemistry and Chemical Engineering》 2014年第11期1089-1092,共4页
Magnetic and relativistic effects in uranium catalysts, the movement of charged particles under the effect of a uniform electric field and uniform magnetic field were studied in the paper. We have considered various m... Magnetic and relativistic effects in uranium catalysts, the movement of charged particles under the effect of a uniform electric field and uniform magnetic field were studied in the paper. We have considered various mechanisms oscillating reactions (Models Jabotinsky-Korzukhina, Brusselator, Oregonator and Advanced Oregonator). The mechanisms of the motion of charged particles under the influence of an electric field and a uniform magnetic field were proposed. 展开更多
关键词 Oscillatory oxidation of arsenites stibnites and vismutinites uranium catalyst NANOPARTICLES
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