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  • 1
    Electronic Resource
    Electronic Resource
    Force Measurement by AFM Cantilever with Different Coating Layers (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 377-380 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Atomic force microscopy (AFM) is widely used in many fields, because of itsoutstanding force measurement ability in nano scale. Some coating layers are used to enhance thesignal intensity, but these coating layers affect the spring constant of AFM cantilever and theaccuracy of force measurement. In this paper, the spring constants of rectangular cantilever withdifferent coating thickness were quantitatively measured and discussed. The finite element methodwas used to analyze the nonlinear force-displacement behavior from which the cantilever’s normaland torsional spring constants could be determined. The experimental data and the numerical resultswere also compared with the results from other methods. By considering the influence of coatinglayers and real cantilever geometries, the more accurate force measurements by AFM cantilever canbe obtained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.377.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Electromagnetic Shielding of Multi-Walled Carbon Nanotube/Epoxy Nanocomposites (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 47-50 (June 2008), p. 475-478 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, carbon nanotubes were used as the reinforcements in the polymer compositesfor the application of electromagnetic interference, due to their outstanding mechanical and electricalproperties. The multi-walled carbon nanotubes (MWNTs) synthesized by the chemical vapordeposition method were used to reinforce the epoxy resin by both mixing and spreading processes.The effects of the weight percentage and the reinforced form of MWNTs on electromagneticinterference shielding effectiveness, including the absorbance and the reflectance, were investigated.From experimental results, the electromagnetic shielding effectiveness of the nanocompositespecimens is improved with increasing content of MWNTs. The nanocomposites fabricated by thespreading process have better shielding effectiveness than those made by the mixing process. Thenanocomposites, made by the spreading process with 2 wt% MWNTs, had up to 22.69 dB ofelectromagnetic shielding effectiveness. The reflectance percentage of electromagnetic shieldingincreases for higher content of MWNTs. The layerwise form of MWNTs in the nanocomposites,resulting from the spreading process and having a better electromagnetic shielding effectiveness, canbe observed from the morphologies of the tensile failure surfaces of the nanocomposite specimens byfiled emission scanning electron microscopy
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.475.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Glass Transition Temperature of Phenolic-Based Nanocomposites Reinforced by MWNTs and Carbon Fibers (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 334-335 (Mar. 2007), p. 713-716 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The multi-walled carbon nanotubes (MWNTs) and carbon fibers (CFs) were added to thephenolic resin to fabricate MWNTs/phenolic, MWNTs/CFs/phenolic nanocomposites andCFs/phenolic composites by hot press method. The differential scanning calorimetry (DSC) test wasperformed for the above-mentioned three kinds of composites. The valley points on the slope ofendothermic responses correspond to the glass transition temperatures of the composites. TheMWNTs/phenolic nanocomposites had the lowest glass transition temperature among the three kindsof composites discussed, which indicated a better thermal conductivity property of MWNTs.Phenolic-based composites reinforced by different weight percentages of MWNTs and CFs were alsoinvestigated. The tensile failure morphologies of nanocomposite specimens were examined using ascanning electron microscope to evaluate the possible effects on the glass transition temperature ofnanocomposites
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.713.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Fabrication and Mechanical Properties of MWNTs/Phenolic Nanocomposites (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 505-507 (Jan. 2006), p. 121-126 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The multi-walled carbon nanotubes (MWNTs) were added into the phenolic resin to fabricate MWNTs/phenolic nanocomposites. The pressure and temperature were applied to cure MWNTs/phenolic compound by hot press method, then followed by a post curing process. The results showed that post-curing of the nanocomposites specimen is necessary for better mechanical properties. The temperature used for post curing should be higher than the curing temperature. The higher curing pressure improved the Young’s modulus of the nanocomposites. The tensile failuremorphologies of MWNTs/phenolic nanocomposites were examined using field emission scanning electron microscope (FESEM) to evaluate the effects of manufacturing processes on the mechanical properties of MWNTs/phenolic nanocomposites
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/11/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.505-507.121.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis of Carbon Nanotubes and its Applications in Composites and Field Emission Light (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3491-3496 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Two processes, the floating catalyst chemical vapor deposition (CVD) process and therapid heating and cooling (RHC) process, were adopted for synthesizing single walled carbonnanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs). Batch production of SWNTsand MWNTs with the diameters of 0.8~1.5 nm and 15~40 nm, respectively, were prepared usingthe floating catalytic chemical vapor deposition (CCVD) process. The production rate is 70±20 mgevery 10 minutes. The as-synthesized carbon nanotubes (CNTs) were used for fabricating carbonnanotubes reinforced composites and field emitter for lighting. On the study of nano-composites,around 70% enhancement of tensile strength was detected when 1.5 wt% MWNTs in the form ofnetwork structure were introduced to the phenolic matrix. Comparisons on the mechanicalproperties of the composites reinforced with the network MWNTs and SWNTs were made.Microstructures of the MWNTs and SWNTs were studied by Field Emission Scanning ElectronMicroscope (FESEM) and High Resolution Transmission Electron Microscope (HRTEM). In theRHC process for fabricating the device for lighting, the carbon nanotube array was grown on asilicon substrate which was pre-coated with a catalyst thin film. The synthesis process wasperformed in a thermal CVD chamber equipped with a rapid heating apparatus. The as-synthesizedCNT array was then transferred onto the substrate which was coated with silver paste. After heattreatment, field emission properties of the CNT-based cathode were tested, high current density of35 mA/cm2 and low turn-on voltage of 0.65 V/μm were achieved in this work
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3491.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Nanofiber Formation in the Fabrication of Carbon/Silicon Carbide Ceramic Matrix Nanocomposites by Slurry Impregnation and Pulse Chemical Vapor Infiltration (2001)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 84 (2001), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The objectives of this work were to investigate the fabrication of carbon-fiber-reinforced SiC ceramic nanocomposites using the slurry impregnation process and the pulse chemical vapor infiltration (PCVI) process and to study the influences of processing parameters of the PCVI process on the microstructure variation of the nanocomposites. In this work, SiC nanosized powder was added to the matrix precursor (silicon powder mixed with phenolic resin), followed by the impregnation of the slurry into the preform. In the PCVI process, to densify the nanocomposites, tetramethylsilane (TMS) vapor mixed with hydrogen was used as the vapor precursor for matrix deposition. Fabrication parameters, such as reactant concentrations, pulse number, and holding time, were studied. Morphologies obtained from various processes were compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2001.tb00899.x
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  • 7
    Electronic Resource
    Electronic Resource
    Fabrication and Characterization of Nanocomposites Reinforced by Carbon Nanotubes - (1) Synthesis of Carbon Nanotubes (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 249 (Sept. 2003), p. 65-68 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.249.65.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamic Mechanical Properties of MWNTs/Phenolic Nanocomposites (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 306-308 (Mar. 2006), p. 1073-1078 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Two different types of multi-walled carbon nanotube (MWNT), the dispersed and the network MWNTs, were used to reinforce the phenolic resin. The MWNTs/phenolic nanocomposites were tested by a dynamic mechanical analyzer (DMA) to characterize their dynamic mechanical properties. The results showed that increasing the MWNT content can increase the storage modulus, the loss modulus and the glassy transition temperature of the MWNTs/phenolic nanocomposites. A subambient loss transition is seen in the nanocomposites with network MWNTs which results in a better impact resistance property in the nanocomposites. The glassy transition temperature of the nanocomposites with network MWNTs is higher than that of nanocomposites with dispersed MWNTs. The MWNT additive in phenolic resin can be used to improve the dynamic mechanical properties of the MWNTs/phenolic nanocomposites. The tensile failure morphologies of MWNTs/phenolic nanocomposites were also examined using field emission scanning electron microscope (FESEM) to explain the difference between the two types of nanocomposites
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.306-308.1073.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Fabrication and Characterization of Nanocomposites Reinforced by Carbon Nanotubes-(2)Testing of Mechanical Properties (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 313 (July 2006), p. 1-6 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Composites of phenolic resin reinforced by the multi-walled carbon nanotubes(MWCNTs) were fabricated and its mechanical properties were measured. The MWCNTs were synthesized by the floating catalyst method in a thermal chemical vapor deposition chamber. Benzene, hydrogen, ferrocene, and thiophene were used as carbon source, carrier gas, catalyst, and growth promoter, respectively. The nano-composites were made by the melt mixing and the resin infiltration methods. Tensile strength, Poisson’s ratio, and modulus were measured and themorphologies on the fracture surface were examined by the field emission scanning electron microscope (FESEM). The microstructure of the synthesized MWCNTs reinforced nano-composites was examined by FESEM. The influences of MWCNTs amounts on the mechanical properties of the nano-composites were discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.313.1.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of low-energy impact and thermal cycling loadings on fatigue behavior of the quasi-isotropic carbon/epoxy composites (1998)
    Springer
    Journal of polymer research 5 (1998), S. 143-151 
    Details
    ISSN: 1572-8935
    Keywords: Low-energy impact ; Thermal cycling ; Carbon/epoxy laminates ; Fatigue ; Residual stiffness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Effects of low-energy impact loading and thermal cycling on fatigue behavior of carbon fiber reinforced epoxy (carbon/epoxy) laminates are examined. A low-energy of 0.62 Joules was adopted to impact carbon/epoxy laminates prior to thermal cycling exposure and fatigue test. The temperature ranged between 60 and −60 °C for thermal cycling and the stress ratio of 0.1 with a frequency of 3 Hz for fatigue loading were used. Impact performances were tested on the virgin specimens and the thermal-cycling exposure specimens. Residual tensile strength and fatigue tests were performed on the laminate composites after being subjected to thermal cycling. The relationship between tensile strength reduction and fatigue performance after thermal cycling was investigated. Stiffness degradation during fatigue testing was monitored; the differences in stiffness for these three composites (virgin specimens, low-energy impacted specimens, low-energy impacted and thermal-cycling exposure specimens) were compared and the coupling effects of low-energy impact and thermal fatigue were studied. Furthermore, the S-N curves were also plotted and the variation was compared on the aforementioned three composites. SEM was used to examine the difference in fracture morphologies on the composites with and without suffering low-energy impact and thermal fatigue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10965-006-0050-y
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