Carbon Nanotube Reinforced Composites: Metal and Ceramic ...

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Figure 5.18 Process map of plasma sprayed coatings indicating change in temperature and velocity of in-flight particles with CNT addition and dispersion. Reproduced with permission from [77]. Copyright Ó (2008) Elsevier. Sol-gel processing is a versatile technique for making high quality glasses and fine ceramics in the forms of thin films and monoliths at much lower temperatures than conventional processing techniques. The process involves the mixing of metal alkoxide precursors such as silicon tetraethyl orthosilicate (TEOS; Si(OC2H5)4) at Figure 5.19 SEM images showing (a) top and (b) cross-section view of alumina template prepared by a two-step anodization method. Highly aligned nanochannels can be readily seen in (b). Reproduced with permission from [79]. Copyright Ó (2001) Elsevier. 5.4 Oxide-Based Nanocompositesj151
152j 5 Carbon Nanotube–Ceramic Nanocomposites the molecular level. TEOS undergoes hydrolysis and condensation leading to the formation of metal oxide network via Si O Si (siloxane) bonding. The presence of acid or basic catalysts can speed up the hydrolysis process. In general, CNTs must be chemically functionalized [90–92]. Otherwise, surfactants must be introduced into the sol to disperse pristine CNTs [86, 89]. Very recently, Berguiga et al. fabricated a SiO2/CNT thin film using the sol-gel technique [92]. In the process, SiO2 sol was prepared by mixing TEOS with hydrochloric acid and ethanol. MWNTs were purified, shortened and funtionalized with chlorine. Functionalized MWNTs were introduced into silica sol under sonication. The SiO2/CNT thin films were then deposited on glass substrates by the dip-coating method. Figure 5.20(a) and (b) show the surface Figure 5.20 Tapping mode AFM images of silica/MWNT film prepared by the sol-gel technique with (a) square area of 1.4 mm and (b) a zoomed area. Reproduced with permission from [92]. Copyright Ó (2006) Elsevier.
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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
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Figure 1.14 Carbon nanotubes in hig
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Figure 1.15 In situ tensile deforma
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Table 1.7 Theoretical and experimen
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Nomenclature ~a 1 , ~a 2 Unit vecto
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carbon nanotubes. Physical Review L
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70 Jang, I., Uh, H.S., Cho, H.J., L
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108 Shelimov, K.B., Esenaliev, R.O.
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Bonnamy, S., Beguin, F., Burnham, N
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2 Carbon Nanotube-Metal Nanocomposi
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isostatic pressing. In certain case
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This implies the absence of effecti
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coating material, the plasma gun an
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Table 2.4 Changes in the size and v
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Figure 2.6 (a) Low and (b) high mag
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Figure 2.8 SEM micrographs showing
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Figure 2.11 Bright field TEM microg
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Figure 2.13 TEM image of bulk Al/5
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2.5 Magnesium-Based Nanocomposites
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limited improvement in ultimate ten
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Figure 2.18 SEM micrographs of the
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Figure 2.19 (a) Low and (b) high ma
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Figure 2.22 SEM micrographs of (a)
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Figure 2.25 (a) TEM micrograph show
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2.8 Transition Metal-Based Nanocomp
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Figure 2.27 TEM image of electrodep
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Figure 2.29 SEM micrographs of (a)
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Figure 2.31 Schematic representatio
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einforcement content SiCp/Al compos
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Materials Science Forum, 534-536 (P
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composite. Materials Science and En
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111 Cha, S.I., Kim, K.T., Arshad, S
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90j 3 Physical Properties of Carbon
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Page 115 and 116: 100j 3 Physical Properties of Carbo
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Page 201 and 202: 186j 7 Mechanical Properties of Car
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202j 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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