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碳金属纤维复合材料的制造方法和特性
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作者 酢谷洁 《电碳》 2001年第2期30-35,23,共7页
关键词 碳金属纤维 复合材料 制造方法 特性 滑板 材料 电力机车 受电弓
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Threshold pressure and infiltration behavior of liquid metal into fibrous preform 被引量:2
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作者 关俊涛 齐乐华 +2 位作者 刘健 周计明 卫新亮 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第11期3173-3179,共7页
A dynamic measuring apparatus was developed to investigate the infiltration process of liquid metal into the fibrous preform. 10% (volume fraction) chopped carbon fiber preforms were infiltrated with magnesium alloy... A dynamic measuring apparatus was developed to investigate the infiltration process of liquid metal into the fibrous preform. 10% (volume fraction) chopped carbon fiber preforms were infiltrated with magnesium alloy under different infiltration pressures. The threshold pressure and flow behavior of liquid metal infiltrating into the preforms were calculated and measured. The microstructure of obtained Ct4Mg composites was observed. The results indicate that the measured threshold pressure for infiltration was 0.048 MPa, which was larger than the calculated value. The infiltration rate increased with the increase of infiltration pressure, but the increase amplitude decreased gradually. The tiny pores in the composites could be eliminated by increasing the infiltration pressure. When the infiltration pressure rose to 0.6 MPa, high quality C1/Mg composite was obtained. 展开更多
关键词 metal matrix composites carbon fiber Mg PERFORM INFILTRATION threshold pressure infiltration rate
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Improved wettability and mechanical properties of metal coated carbon fiber-reinforced aluminum matrix composites by squeeze melt infiltration technique 被引量:11
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作者 Jian-jun SHA Zhao-zhao LÜ +6 位作者 Ru-yi SHA Yu-fei ZU Ji-xiang DAI Yu-qiang XIAN Wei ZHANG Ding CUI Cong-lin YAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第2期317-330,共14页
In order to improve the wettability and bonding performance of the interface between carbon fiber and aluminum matrix,nickel-and copper-coated carbon fiber-reinforced aluminum matrix composites were fabricated by the ... In order to improve the wettability and bonding performance of the interface between carbon fiber and aluminum matrix,nickel-and copper-coated carbon fiber-reinforced aluminum matrix composites were fabricated by the squeeze melt infiltration technique.The interface wettability,microstructure and mechanical properties of the composites were compared and investigated.Compared with the uncoated fiber-reinforced aluminum matrix composite,the microstructure analysis indicated that the coatings significantly improved the wettability and effectively inhibited the interface reaction between carbon fiber and aluminum matrix during the process.Under the same processing condition,aluminum melt was easy to infiltrate into the copper-coated fiber bundles.Furthermore,the inhibited interface reaction was more conducive to maintain the original strength of fiber and improve the fiber−matrix interface bonding performance.The mechanical properties were evaluated by uniaxial tensile test.The yield strength,ultimate tensile strength and elastic modulus of the copper-coated carbon fiber-reinforced aluminum matrix composite were about 124 MPa,140 MPa and 82 GPa,respectively.In the case of nickel-coated carbon fiber-reinforced aluminum matrix composite,the yield strength,ultimate tensile strength and elastic modulus were about 60 MPa,70 MPa and 79 GPa,respectively.The excellent mechanical properties for copper-coated fiber-reinforced composites are attributed to better compactness of the matrix and better fiber−matrix interface bonding,which favor the load transfer ability from aluminam matrix to carbon fiber under the loading state,giving full play to the bearing role of carbon fiber. 展开更多
关键词 carbon fiber metal matrix composite Cf/Al composite COATING WETTABILITY mechanical properties
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STUDIES ON THE CATALYTIC REACTION OF NITROGEN OXIDE ON METAL MODIFIED ACTIVATED CARBON FIBERS
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作者 FURuowen DUXiuying +2 位作者 LINYuansheng XUHao HUYiongjun 《Chinese Journal of Reactive Polymers》 2003年第1期17-25,共9页
The catalytic reaction of NO with CO and decomposition of NO over metal modified ACFs were investigated and compared with other carriers supported catalysts. It is demonstrated that Pd/ACF and Pd/Cu/ACF have high cata... The catalytic reaction of NO with CO and decomposition of NO over metal modified ACFs were investigated and compared with other carriers supported catalysts. It is demonstrated that Pd/ACF and Pd/Cu/ACF have high catalytic activity for the reaction of NO/CO, while Pt/ACF, Pt/Cu/ACF and Co/Cu/ACF have very low catalytic activity in similar circumstance. Pd-modified ACF possesses high catalytic decomposition of NO at 300℃. Pd/CB and Pd/GAC present good catalytic decomposition ability for NO only at low flowrate. Pd/G, Pd/ZMS and Pd/A however, do not show any catalytic activity for NO decomposition even at 400℃. Catalytic temperature, NO flowrate and loading of metal components affect the decomposition rate of NO. The coexistence of Cu with Pd on Cu/Pd/ACF leads to crystalline of palladium to more unperfected so as to that increase the catalytic activity. 展开更多
关键词 Activated carbon fiber PALLADIUM Catalytic reduction Catalytic decomposition Nitrogen monoxide
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Probing the Young's modulus and Poisson's ratio in graphene/metal interfaces and graphite: A comparative study 被引量:5
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作者 Antonio Politano Gennaro Chiarello 《Nano Research》 SCIE EI CAS CSCD 2015年第6期1847-1856,共10页
By analyzing phonon dispersion, we have evaluated the average Young's modulus and Poisson's ratio in graphite and in graphene grown on Ru(0001), Pt(111), Ir(111), Ni(111), and BC3/NbB2(0001). In both flat ... By analyzing phonon dispersion, we have evaluated the average Young's modulus and Poisson's ratio in graphite and in graphene grown on Ru(0001), Pt(111), Ir(111), Ni(111), and BC3/NbB2(0001). In both flat and corrugated graphene sheets and in graphite, we find a Poisson's ratio of 0.19 and a Young's modulus of 342 N/m. The unique exception is graphene/Ni(111), for which we find different values because of the stretching of C-C bonds occurring in the commensurate overstructure (0.36 and 310 N/m for the Poisson's ratio and Young's modulus, respectively). Such findings are in excellent agreement with calculations performed for a free-standing graphene membrane. The high crystalline quality of graphene grown on metal substrates leads to macroscopic samples with high tensile strength and bending flexibility for use in technological applications such as electromechanical devices and carbon-fiber reinforcements. 展开更多
关键词 Young's modulus Poisson's ration elastic properties GRAPHENE
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Encapsulated MnO in N-doping carbon nanofibers as efficient ORR electrocatalysts 被引量:7
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作者 Chaoqun Shang Mingyang Yang +10 位作者 Zhenyu Wang Minchan Li Meng Liu Jian Zhu Yinggang Zhu Liangjun Zhou Hua Cheng Yingying Gu Yougen Tang Xingzhong Zhao Zhouguang Lu 《Science China Materials》 SCIE EI CSCD 2017年第10期937-946,共10页
Development of cheap,abundant and noblemetal-free materials as high efficient oxygen reduction electrocatalysts is crucial for future energy storage system. Here,one-dimensional(1D) MnO N-doped carbon nanofibers(Mn... Development of cheap,abundant and noblemetal-free materials as high efficient oxygen reduction electrocatalysts is crucial for future energy storage system. Here,one-dimensional(1D) MnO N-doped carbon nanofibers(MnO-NCNFs) were successfully developed by electrospinning combined with high temperature pyrolysis. The MnO-NCNFs exhibit promising electrochemical performance,methanol tolerance,and durability in alkaline medium. The outstanding electrocatalytic activity is mainly attributed to several issues.First of all,the uniform 1D fiber structure and the conductive network could facilitate the electron transport. Besides,the introduction of Mn into the precursor can catalyze the transformation of amorphous carbon to graphite carbon,while the improved graphitization means better conductivity,beneficial for the enhancement of catalytic activity for oxygen reduction reaction(ORR). Furthermore,the porous structure and high surface area can effectively decrease the mass transport resistance and increase the exposed ORR active sites,thus improve utilization efficiency and raise the quantity of exposed ORR active sites. The synergistic effect of MnO and NCNFs matrix,which enhances charge transfer,adsorbent transport,and delivers efficiency in the electrolyte solution,ensures the high ORR performance of MnO-NCNFs. 展开更多
关键词 ELECTROSPINNING MNO N-doping carbon nanofibers GRAPHITIZATION oxygen reduction electrocatalysts
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Composites recycling solutions for the aviation industry 被引量:4
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作者 WONG Kok RUDD Chris +1 位作者 PICKERING Steve LIU XiaoLing 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2017年第9期1291-1300,共10页
Ten of thousands of aircraft are expected to retire in the next 20 years.Aircraft manufacturers are gearing up for a new wave of recycling challenges as these aircrafts contain significant higher amount of carbon fibr... Ten of thousands of aircraft are expected to retire in the next 20 years.Aircraft manufacturers are gearing up for a new wave of recycling challenges as these aircrafts contain significant higher amount of carbon fibre reinforced polymer composite,which cannot be recycled by the conventional processes designed for metallic alloys.Aircraft manufacturers have been working with the recycling industry to limit unsustainable dismantling that is harmful to the environment and the potential liability risk of re-entry of un-certified salvaged parts back to the aviation market.An organised recycling network and procedures have already been set up for the conventional metallic alloys and will soon be required to include the composite waste.This paper reports the existing aircraft recycling practice and reviews the key recycling technologies for thermoset composites.Energy consumptions of these technologies are sought from the literature and are reported in this paper.Progress in development of reuse options for the recycled fibre is also included with discussion of their advantages and drawbacks.The challenge of working with the fluffy fibre is considered and the benefit of fibre alignment is highlighted for encouraging a widespread use of the fibre. 展开更多
关键词 composite recycling carbon fibre AVIATION
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One-pot synthesis of hierarchical CoS/NC@MoS/C hollow nanofibers based on one-dimensional metal coordination polymers for enhanced lithium and sodium-ion storage 被引量:6
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作者 Yanzi Wang Wanyi Xie +8 位作者 Dongzhi Li Pei Han Ludi Shi Yuanyi Luo Guangtao Cong Cuihua Li Jiali Yu Caizhen Zhu Jian Xu 《Science Bulletin》 SCIE EI CAS CSCD 2020年第17期1460-1469,M0003,M0004,共12页
Multicomponent metal sulfides have been recognized as promising anode materials for lithium/sodiumion storage given their enticing theoretical capacities. However, the simplification of synthetic processes and the con... Multicomponent metal sulfides have been recognized as promising anode materials for lithium/sodiumion storage given their enticing theoretical capacities. However, the simplification of synthetic processes and the construction of heterogeneous interfaces of multimetal sulfides remain great challenges. Herein,a hierarchical 1T-MoS2/carbon nanosheet decorated Co1–xS/N-doped carbon(Co1–xS/NC@MoS2/C) hollow nanofiber was designed and constructed via a one-pot hydrothermal method using a cobalt-based coordination polymer nanofiber. This nanofiber can transform in-situ into conductive N-doped carbon hollow fibers embedded with active Co1–xS nanoparticles, enabling the epitaxial growth of MoS2 nanosheets.Consequently, the Co1–xS/NC@MoS2/C composites achieve exceptional lithium/sodium-ion storage performance. Compared to MoS2/C microspheres and Co1–xS/NC hollow nanofibers alone, the Co1–xS/NC@MoS2/C hollow nanofibers deliver higher discharge capacities(1085.9 mAh g^-1 for lithium-ion batteries(LIBs) and 748.5 mAh g^-1 for sodium-ion batteries(SIBs) at 100 mA g^-1), better capacity retention(910 mAh g^-1 for LIBs and 636.5 mAh g^-1 for SIBs after 150 cycles at 100 mA g^-1), and increased cycling stability(407.2 mAh g^-1 after 1000 cycles for SIBs at 1000 m A g^-1). Furthermore, the kinetic analysis shows that the lithium/sodium-ion storage processes of the Co1–xS/NC@MoS2/C electrode are mainly controlled by pseudocapacitance behavior. The excellent electrochemical properties can thus be ascribed to the synergy of the MoS2/C nanosheets with the enlarged interlayer spacing, good conductivity of the carbon layers, and the Co1–xS nanoparticles embedded in the hollow nanofibers with extensive reaction sites. 展开更多
关键词 Coordination polymer nanofiber Metallic sulfides Hierarchical hollow architecture One-pot synthesis Lithium/sodium-ion storage
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