Carbon Nanotube Reinforced Composites: Metal and Ceramic ...

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Figure 2.29 SEM micrographs of (a) CoO nanocrystals and (b) CoO/MWNT nanopowders containing 7 vol.% MWNT; (c) highresolution TEM image of the area near the MWNT-CoO interface; (d) X-ray diffraction pattern of the CoO/MWNT nanopowders. Reproduced with permission from [110]. Copyright Ó (2007) Wiley-VCH Verlag GmbH. due to the absence of oxygen transient bonding layer. As mentioned above, residual oxygen is found at the nanotube-matrix interface by using funtionalized nanotubes as precursor materials. Residual oxygen enhances interfacial bonding and mechanical strength of the composites, but degrades their electrical and thermal properties. This is because interfacial oxygen bonding layers act as a scattering center for electron and phonon. 2.8.3 Fe-Based Nanocomposites 2.8 Transition Metal-Based Nanocompositesj77 All the fabrication techniques for making metal–CNT nanocomposites described above can be referred to as ex situ since the CNTs have been synthesized independently and then introduced directly into metal matrices of composites during processing. On the other hand, in situ CNT reinforcement can be synthesized in situ in the metal matrix using transition metal catalysts through the CO
78j 2 Carbon Nanotube–Metal Nanocomposites Figure 2.30 TEM micrographs of spark plasma sintered (a) Co and (b) Co/7 vol% MWNT nanocomposite with ultrafine-grained matrix. (c) SEM and (d) high-resolution TEM micrographs of Co/7 vol% MWNT nanocomposite. Reproduced with permission from [110]. Copyright Ó (2007) Wiley-VCH Verlag GmbH. disproportionation method. Very recently, Goyal et al. prepared in situ Fe/SWNT and Fe/MWNT nanocomposites using CO disproportionation method [112, 113]. To prepare the Fe/MWNT nanocomposite, the Co catalyst and catalyst precursors, that is iron acetate (0.01 wt%) and cobalt acetate (0.01 wt%), were dissolved in ethanol. Iron powder was soaked in this solution, dried and pressed into pellets. The porosities of pellets were controlled by varying the pelletizing pressure. The pellets were placed in a quartz boat located inside a horizontal quartz tube reactor in a high temperature furnace (800 C). Mixed acetylene, CO and argon
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Sie Chin Tjong Carbon Nanotube Rein
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Sie Chin Tjong Carbon Nanotube Rein
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Contents Preface IX List of Abbrevi
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5 Carbon Nanotube-Ceramic Nanocompo
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Preface Carbon nanotubes are nanost
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XII List of Abbreviations HIP hot i
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1 Introduction 1.1 Background Compo
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Figure 1.2 Transmission electron mi
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1.3 Synthesis of Carbon Nanotubes 1
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MWNTs can be as high as 70% of the
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Figure 1.7 In situ TEM images recor
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1.3 Synthesis of Carbon Nanotubesj1
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show TEM images of MWNTs synthesize
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Since then, large efforts have been
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1.3.4 Patent Processes Carbon nanot
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1.4 Purification of Carbon Nanotube
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Table 1.3 Patent processes for the
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Figure 1.13 Schematic illustration
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1.5 Mechanical Properties of Carbon
Page 42 and 43: Figure 1.14 Carbon nanotubes in hig
Page 44 and 45: Figure 1.15 In situ tensile deforma
Page 46 and 47: Table 1.7 Theoretical and experimen
Page 48 and 49: Nomenclature ~a 1 , ~a 2 Unit vecto
Page 50 and 51: carbon nanotubes. Physical Review L
Page 52 and 53: 70 Jang, I., Uh, H.S., Cho, H.J., L
Page 54 and 55: 108 Shelimov, K.B., Esenaliev, R.O.
Page 56 and 57: Bonnamy, S., Beguin, F., Burnham, N
Page 58 and 59: 2 Carbon Nanotube-Metal Nanocomposi
Page 60 and 61: isostatic pressing. In certain case
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Page 64 and 65: coating material, the plasma gun an
Page 66 and 67: Table 2.4 Changes in the size and v
Page 68 and 69: Figure 2.6 (a) Low and (b) high mag
Page 70 and 71: Figure 2.8 SEM micrographs showing
Page 72 and 73: Figure 2.11 Bright field TEM microg
Page 74 and 75: Figure 2.13 TEM image of bulk Al/5
Page 76 and 77: 2.5 Magnesium-Based Nanocomposites
Page 78 and 79: limited improvement in ultimate ten
Page 80 and 81: Figure 2.18 SEM micrographs of the
Page 82 and 83: Figure 2.19 (a) Low and (b) high ma
Page 84 and 85: Figure 2.22 SEM micrographs of (a)
Page 86 and 87: Figure 2.25 (a) TEM micrograph show
Page 88 and 89: 2.8 Transition Metal-Based Nanocomp
Page 90 and 91: Figure 2.27 TEM image of electrodep
Page 94 and 95: Figure 2.31 Schematic representatio
Page 96 and 97: einforcement content SiCp/Al compos
Page 98 and 99: Materials Science Forum, 534-536 (P
Page 100 and 101: composite. Materials Science and En
Page 102: 111 Cha, S.I., Kim, K.T., Arshad, S
Page 105 and 106: 90j 3 Physical Properties of Carbon
Page 115 and 116: 100j 3 Physical Properties of Carbo
Page 117 and 118: 102j 3 Physical Properties of Carbo
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128j 4 Mechanical Characteristics o
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130j 4 Mechanical Characteristics o
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132j 5 Carbon Nanotube-Ceramic Nano
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170j 6 Physical Properties of Carbo
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186j 7 Mechanical Properties of Car
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Table 8.1 Patent processes for maki
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218j 8 Conclusions development of c
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220j 8 Conclusions Figure 8.2 TEM m
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222j 8 Conclusions increase in Vick
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224j 8 Conclusions References 1 Cha
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226j 8 Conclusions nano-matrix. Scr
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228j Index l laser ablation 7 load
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