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30CrMnSiA钢高温回火脆性的内耗法研究

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沈阳工业大学学报 1996年第S1期18卷 33-36页

作者：孙晶唐之秀雷廷权沈阳工业大学哈尔滨工业大学

采用内耗法研究了30CrMnSiA钢的高温回火脆性。结果表明,这种钢高温回火脆性的出现总是伴随内耗曲线上Snoek峰和Koster峰的下降或消失。说明这种钢高温回火脆性的产生是与C(N)原子自α-固溶体中脱溶,并以C(N)化合物沉淀质点对晶内位错... 详细信息

采用内耗法研究了30CrMnSiA钢的高温回火脆性。结果表明,这种钢高温回火脆性的出现总是伴随内耗曲线上Snoek峰和Koster峰的下降或消失。说明这种钢高温回火脆性的产生是与C(N)原子自α-固溶体中脱溶,并以C(N)化合物沉淀质点对晶内位错产生强钉扎有关。

关键词：回火/呐耗/Snoek峰/Koster峰

Ni60A等离子喷涂层的组织结构及其摩擦磨损特性

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钢铁研究学报 1999年第5期11卷 56-59页

作者：陈传忠李士同耿浩然周香林王国敦于家洪雷廷权山东工业大学材料科学与工程学院济南2500612 哈尔滨工业大学材料科学与工程学院哈尔滨150001

研究了Ｎｉ６０Ａ等离子喷涂层的组织结构及其摩擦磨损特性：涂层呈片层状的堆积状态，片层内为镍基固溶体及弥散分布其上的尺寸较大的Ｃｒ７Ｃ３、Ｃｒ２３Ｃ６及尺寸较小的Ｎｉ３Ｂ颗粒；涂层的平均硬度约ＨＶ６８３；涂层的磨损机... 详细信息

研究了Ｎｉ６０Ａ等离子喷涂层的组织结构及其摩擦磨损特性：涂层呈片层状的堆积状态，片层内为镍基固溶体及弥散分布其上的尺寸较大的Ｃｒ７Ｃ３、Ｃｒ２３Ｃ６及尺寸较小的Ｎｉ３Ｂ颗粒；涂层的平均硬度约ＨＶ６８３；涂层的磨损机制是剥层磨损和磨料磨损。

关键词：镍基合金等离子喷涂组织结构摩擦磨损特性

烧结温度对全稳定ZrO2陶瓷显微结构及性能的影响

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硅酸盐学报 1988年第1期 27-33页

作者：周玉雷廷权刘国斌曹希宾哈尔滨工业大学

本文采用湿化学法制备出14mol％MgO-ZrO2粉末,并采用无压烧结法进行烧结。研究了烧结体的相结构、显微组织、力学性能、化学成分均匀性及其与烧结工艺的关系。结果表明,用温化学法制备的全稳定ZrO2（FSZ）粉末,烧结成陶瓷后仍为FSZ,经... 详细信息

本文采用湿化学法制备出14mol％MgO-ZrO2粉末,并采用无压烧结法进行烧结。研究了烧结体的相结构、显微组织、力学性能、化学成分均匀性及其与烧结工艺的关系。结果表明,用温化学法制备的全稳定ZrO2（FSZ）粉末,烧结成陶瓷后仍为FSZ,经剧烈研磨后仍无相转变。在1550—1700℃温度范围内烧结,随烧结温度的升高,MgO的晶界偏聚程度加剧,晶内含量减少,晶格常数增大,密度、硬度及断裂韧性均降低。断口中沿晶断裂比例增加,解理断裂比例减少,而且解理面变得平坦。

关键词：烧结温度 MgO ZrO2 断裂韧性破断韧性力学强度

Joint Probabilistic Scheduling and Resource Allocation for Wireless Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 258-260页

作者： Meng Zheng lei Zhang Wei Liang IEEE the State Key Laboratory of Robotics and the Key Laboratory of Networked Control Systems Shenyang Institute of Automation Chinese Academy of Sciences the University of Chinese Academy of Sciences

Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.

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Fluorinated poly(p-triphenylene isatin) anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanchao Zhang Zhanyu Li Yijia lei Baozeng Sun Xiaoyu Yu Zhe Wang College of Chemistry and Life Science Changchun University of Technology College of Chemical Engineering Changchun University of Technology School of Materials Science and Engineering Changchun University of Technology Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes （AEMs） has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone （x=40,50,and 60） into the main chain of poly（p-terphenylene isatin）.Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF50-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm-1at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF50-NOH shows a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Anion exchange membranes Poly(p-terphenylene isatin) Hydrophilic-hydrophobic phase separation Fluorinated group

Statistical characteristics and classification of ionospheric mid-latitude trough as revealed by the observations of DMSP-F18

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Earth and Planetary Physics 2025年第1期9卷 137-147页

作者： Yi Liu JiuHou lei FuQing Huang Su Zhou School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China School of Science Guiyang UniversityGuiyang 550005China

Statistical characteristics and the classification of the topside ionospheric mid-latitude trough are systemically analyzed,using observations from the Defense Meteorological Satellite Program F18(DMSP-F18)*** data was obtained at an altitude of around 860 km in near polar orbit,throughout *** study identified the auroral boundary based on the in-situ electron density and electron spectrum,allowing us to precisely determine the location of the mid-latitude *** differs from most previous works,which only use Total Electron Content(TEC)or in-situ electron *** our study,the troughs exhibited a higher occurrence rate in local winter than in summer,and extended to lower latitudes with increasing geomagnetic *** was found that the ionospheric mid-latitude trough,which is associated with temperature changes or enhanced ion drift,exhibited distinct ***,the ionospheric mid-latitude troughs related to electron temperature(Te)peak were located more equatorward of auroral oval boundary in winter than in *** ionospheric mid-latitude troughs related to Te-maximum were less frequently observed at 60−70°S magnetic latitude and 90−240°E ***,the troughs related to ion temperature(Ti)maximums were observed at relatively higher latitudes,occurring more frequently in *** addition,the troughs related to ion velocity(Vi)maximums could be observed in all *** troughs with the maximum-Ti and maximum-Vi were located closer to the equatorward boundary of the auroral oval at the nightside,and in both *** implies that enhanced ion drift velocity contributes to increased collisional frictional heating and enhanced ion temperatures,resulting in a density depletion within the trough region.

关键词： topside ionosphere mid-latitude trough ionospheric main trough auroral oval boundary temperature maximum

Dative B–N bonds weaven toward two-dimensional purely organic materials for single crystals

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Science China Chemistry 2025年第01期 12-14页

作者： Wei-lei Zhou Siwei Wang Yong Chen College of Chemistry and Materials Science Inner Mongolia Key Laboratory of Chemistry for Nature Products and Synthesis for Functional Molecules Innovation Team of Optical Functional Molecular Devices Inner Mongolia Minzu University College of Chemistry Nankai University

Molecular topology is one of the important topics to study and understand the relationship between molecular structure and properties [1]. Particularly, two-dimensional (2D) materials with extremely high surface area and ultra-thin morphology have attracted considerable attention due to their unexpected properties in materials and chemistry [2,3].

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CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin Jiang Bao-Xia Dong Yun-lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride Ni catalysts Carbonate Metal-carbonate interface

原位反应生成W_2B_5-C复合材料的力学性能和电加工性能

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陶瓷科学与艺术 2003年第6期37卷 44-47页

作者：吕毅温广武宋亮雷廷权周玉哈尔滨工业大学材料科学与工程学院哈尔滨150001

本文采用热压方法,利用碳化硼和碳化钨之间的固相化学反应,原计生成W_2B_5-C复合材料。这种复合材料具有较高的致密度,优异的力学性能和导电性,其致密度,抗弯强度和断裂韧性分别高达96.1％,768.2MPa和8.89MPa和8.89MPa·m^(1/2),电阻率... 详细信息

本文采用热压方法,利用碳化硼和碳化钨之间的固相化学反应,原计生成W_2B_5-C复合材料。这种复合材料具有较高的致密度,优异的力学性能和导电性,其致密度,抗弯强度和断裂韧性分别高达96.1％,768.2MPa和8.89MPa和8.89MPa·m^(1/2),电阻率仅为0.61μΩ·m。由于具有优良的导电性,W_2B_5-C复合材料能够容易地进行电火花线切割。

关键词： W285-C复合材料力学性能电加工性能原位反应致密度抗弯强度断裂韧性