mechanical and thermal properties of carbon nanotubes

... www.elsevier.com/locate/XXX Proceedings of the JMSM 2008 Conference Experimental investigation of the mechanical micro structural and thermal properties of thin CrAIN layers deposited by PVD technique ... The present work is based on the investigation of physical and mechanical properties of CrAlN coating deposited on a silicon substrate and the effect of the aluminium proportion on their variation ... morphology, porosity and the thermal properties The correlation between aluminum proportions in CrAlN coatings and his thermal properties revealed that the conductivity and the diffusivity are...

Ngày tải lên: 02/11/2022, 10:39

... calcium carbonates, carbon nanotubes, nano clays etc are often added to polymer Particulate fillers modify physical and mechanical properties of polymers in many ways Use of carbon black for improving ... concentration, to investigate their effect on the morphol-ogy, mechanical, dynamic mechanical and thermal properties of raw SBR and NR Morphology of the Gel Filled Rubbers EDX or energy dispersive X-ray ... various properties have also been reported with other types of nanofillers e.g multiwalled carbon nanotubes and layered double hydroxides [11,12] Although not strictly categorized as filler, use of...

Ngày tải lên: 22/06/2014, 01:20

... dynamometer in terms of the viscosity of materials 3 Results and Discussion 3.1 Morphology and mechanical performance of the re-ABS/NBR blend The mechanical properties of the re-ABS/NBR blends ... Furthermore, the thermal stability of the nanocomposites was also improved in the presence of NBR and N15 Keywords: A Polymer-matrix composites (PMCs); B Mechanical properties; B Thermal properties; ... 93.2 Morphology, structure, and properties of re-ABS/NBR/N15 nanocomposites 3.2.1 Mechanical performance Fig 4 shows the mechanical properties of the re-ABS/NBR blend and re-ABS/NBR/N15 nanocomposites...

Ngày tải lên: 16/12/2017, 10:26

... presence of ONieAl LDH nanofiller (1, 3, 5, and 7 wt.%) The PS nanocomposites were characterized for their structural, thermal and mechanical properties The dispersion and morphology of the obtained ... 1Original ArticleEnhanced mechanical and thermal properties of polystyrene double hydroxide via melt intercalation technique Department of Chemical Engineering, Indian Institute of Technology Guwahati, ... investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM) Mechanical and thermal properties of the PS nanocomposites as a function of LDH content were examined by tensile...

Ngày tải lên: 27/01/2021, 06:25

... MANAGEMENT, GCMM 2014 Mechanical and thermal properties of horn fibre reinforced polypropylene composites a Department of Mechanical Engineering, C.Abdul Hakeem College of Engineering and Technology, ... fibre (HF) and polypropylene (PP) Physical, mechanical, thermal and micro-structural properties of HF/PP composites with varying fibre wt% (5%, 10%, 15% and 20%) have been characterized and compared ... by Tasneem Zahra Rizvi and Muhammad Abdullah Khan [2] Structure and mechanical properties of proteins have been discussed by Marc Andre Meyers et al [3] Tensile properties of various plant-based...

Ngày tải lên: 02/11/2022, 14:30

... Mechanical Properties of Carbon Nanotubes Boris I Yakobson1 and Phaedon Avouris2 Center for Nanoscale Science and Technology and Department of Mechanical Engineering and Materials ... thousand, makes the mechanical properties especially interesting and important due to potential structural applications Mechanical Properties and Mesoscopic Duality of Nanotubes The utility of nanotubes ... to, the Mechanical Properties of Carbon Nanotubes 289 substrates, Sect 5.1 Closely related issues of manipulation of the tubes position and shape, and their self-organization into ropes and rings,...

Ngày tải lên: 24/03/2014, 05:20

... ultrasonication time effects on sediment and the thermal conductivity of the carbon nanotube- ethylene glycol nanofluids and found that thermal conductivity of the nanofluids increased with sonication ... Introduction Thermal conductivity and viscosity of a heat transfer fluid play an important role in efficiency improvement of thermal equipment and systems as: air-conditioning and refrigeration, ... length and 1.3 mm in diameter) of the KD2-pro thermal property meter integrates a heating element and a thermometer Both the heat output and the temperature rise of the probe were recorded and sent...

Ngày tải lên: 21/06/2014, 17:20

... wt% of MWCNT in case of former and with 5 wt% in case of the latter Electrical Properties One unique property of the MWCNTs is their electrical conductivity because of their large aspect ratio and ... because of their unique as well as superior physical, electrical, magnetic, chemical stability, thermal conductivity and mechanical properties [2] Due to their exceptionally high aspect ratio and mechanical ... Trang 1N A N O E X P R E S SInfluence of Surface Modified MWCNTs on the Mechanical, Electrical and Thermal Properties of Polyimide Nanocomposites B P SinghÆ Deepankar Singh Æ...

Ngày tải lên: 22/06/2014, 01:20

... to the buckling and postbuckling behavior of FGM structures subjected to mechanical, thermal, and thermomechanical loads Eslami and his co-workers [1-7] have treated a series of problems relating ... for odd values of m and n, is used to determine the buckling loads and postbuckling curves for rectangular FGM plates under mechanical, thermal, and combined loads 4.1 Analysis of mechanical stability ... temperature-dependent material property, and the subscripts m and c stand for the metal and ceramic con-stituents, respectively From Eqs (1) and (2), the effective properties of the FGM plate can be written...

Ngày tải lên: 16/12/2017, 15:25

... 1Optical Properties and Raman Spectroscopyof Carbon Nanotubes Riichiro Saito1and Hiromichi Kataura2 1 Department of Electronic-Engineering, The University of Electro-Communications 1-5-1, Chofu-gaoka, ... introduce the basic definitions of the carbon nanotube structureand of the calculated electronic and phonon energy bands with their specialDensity of States (DOS) The structure of a SWNT is specified by ... calculation of the energy bands of 2Dturbostratic graphite [8,9] and experimental data [2,10] The corresponding energy contour plot of the 2D energy bands of graphite with s = 0 and  2p= 0 is...

Ngày tải lên: 07/09/2020, 14:39

... physical properties of the nanotubes The symmetry groups for carbon nanotubes can be either symmorphic [such as armchair (n,n )and zigzag Physics of carbon nanotubes 29 Table Parameters of carbon nanotubes ... modes of carbon nanotubes: Spectroscopy and theory 129 R S RUOFF and D C KORENTS: Mechanical and thermal properties of carbon nanotubes ... on carbon nanotubes We hope this book will contribute to the dissemination of present understanding of the subject and to future developments in the science and technology of carbon nanotubes and...

Ngày tải lên: 05/03/2014, 15:21

... WA III: Thermal conductivity of carbon nanotubes Nanotechnology 2000, 11:65-69 30 Padgett CW, Brenner DW: Influence of chemisorption on the thermal conductivity of single-wall carbon nanotubes ... dispersion and separation of carbon nanotubes Nat Mater 2003, 2:338-342 Figure Lattice thermal conductivity of tube (4,2) as a function of temperature Results from the Callaway-Holland model and the ... performance of zigzag and chiral carbon nanotubes Xiaojian Tan1, Huijun Liu*1, Yanwei Wen1, Hongyan Lv1, Lu Pan1, Jing Shi*1, and Xinfeng Tang2 Key Laboratory of Artificial Micro- and Nano-structures of...

Ngày tải lên: 21/06/2014, 17:20

... properties of carbon nanotubes 1.1.3 Applications of carbon nanotubes 1.2 Motivation 1.3 Objective and scope of work 11 1.4 Layout of the thesis 13 CHAPTER 2: LITERATURE REVIEW 2.1 Buckling of ... bonds where each carbon atom is bonded to other carbon atoms 1.1.2 Mechanical properties of carbon nanotubes Carbon nanotube is known to possess superior mechanical properties These properties have ... achiral carbon nanotubes The latter comprises of both zigzag and armchair carbon nanotubes This categorization is done based on the orientation of carbon- carbon (C-C) bonds Orientation of C-C...

Ngày tải lên: 09/09/2015, 18:54

... LIST OF SYMBOLS XV XVII CHAPTER INTRODUCTION 1.1 Background 1.2 Carbon Nanotubes 1.2.1 Discovery of Carbon Nanotubes 1.2.2 Bonding Structures of Carbon Nanotubes 1.2.3 Properties of Carbon Nanotubes ... 29 S Saito and A Zettl, Carbon Nanotubes: Quantum Cylinders of Graphene (Elsevier, UK, 2008) 30 S Reich, C Thomsen, and J Maultzsch, Carbon Nanotubes: Basic Concepts and Physical Properties (Wiley-VCH, ... Schematic illustration of sp1, sp2 and sp3 hybrid carbon orbitals Hybridization determines the type of bonding of the carbon atoms with their types n neighbors, and different types of bonding are responsible...

Ngày tải lên: 11/09/2015, 10:17

... emission mass, barrier height of the emitter F is the local field, ε0 is the permittivity of free space, emitters, 21 Chapter Physics of Field Emission and t(y) and υ(y) are the Nordheim elliptic ... electron emission mechanism The slope of the linear region of the F-N plot is a function of both β and Ø, which can be expressed as below by transformation of the Eq (2.3): φ3/ Slope = −6.83 × ... low and high electrical field This deviation might be due to the space charge effects, overheating of the emitter tips or the low concentration of the carriers in the tips, conduction band of...

Ngày tải lên: 11/09/2015, 10:17

... temperatures than conventional thermal CVD and that epitaxial growth could be successfully achieved The quality and complexity of the equipment and the diversity and purity of the precursor chemicals ... various materials, including carbon and carbon related materials (diamond, nanocrystalline diamond and CNTs, etc.) and non -carbon advanced materials, such as GaN, SiC, Ga2O3 and silicon whiskers [18] ... representing the order of diffraction, λ is the wavelength, d is the interplanar spacing of the reflecting (diffracting) plane, and θ is the angle of the incidence and of the diffraction of the radiation...

Ngày tải lên: 11/09/2015, 10:17

... covered with amorphous carbon, which is the product of the thermal deposition of hydrocarbon [3] 52    Chapter Synthesis of Vertically-Aligned Carbon Nanotubes In terms of other CNT growth approaches, ... Schematic setup of the PECVD system used 55    Chapter Synthesis of Vertically-Aligned Carbon Nanotubes 4.3 Results and Discussion 4.3.1 Characterization of the As-Grown Carbon Nanotubes Fig 4.2 ... Synthesis of Vertically-Aligned Carbon Nanotubes 18 S Hofmann, B Kleinsorge, C Ducati, A C Ferrari, and J Roberson, Diamond Relat Mater 13, 1171 (2004) 19 M Meyyappan, Carbon Nanotubes: Science and...

Ngày tải lên: 11/09/2015, 10:18

... low electron affinity and strong mechanical properties of DLC and the one-dimensional free-standing geometry of CNTs by coating the DLC thin films directly onto the surface of the vertically-aligned ... primarily c composed of carbon Fig 6.5 shows the carbon 1s core level XPS spectrum of the film Two peaks with the binding energy (BE) of 284.5 and 285.2 eV confirm a high sp3 content of 126 Chapter ... of Hydrogenated Tetrahedral Amorphous Carbon Coated Carbon Nanotubes Core-Shell Nanostructures 6.3.4 FE Performance of the Composite Emitters with Varied Thicknesses of Coating Films The FE properties...

Ngày tải lên: 11/09/2015, 10:18