Thermal Behavior of Carbon Nanotubes in Alumina Matrix Nanocomposites

2007 ◽  
Vol 124-126 ◽  
pp. 755-758
Author(s):  
Sung Tag Oh ◽  
Seung Hwa Yoo ◽  
Jae Kyo Jang ◽  
Chul Kyu Song ◽  
Yong Ho Choa ◽  
...  
Keyword(s):  
Activation Energy ◽  
Carbon Nanotubes ◽  
Thermal Behavior ◽  
Relative Density ◽  
Microstructural Characterization ◽  
Alumina Matrix ◽  
Porosity Effect ◽  
The Difference ◽  
Matrix Nanocomposites

Thermal behavior and microstructural characterization of the CNTs/Al2O3 nanocomposites with different relative densities were studied by TGA and SEM. The onset temperature for weight loss corresponded to a decomposition of CNTs in TGA increased with an increase of relative density. The activation energy for CNTs decomposition obtained by the Kissinger method increased with increasing relative density. The difference in thermal behavior was explained by the porosity effect on the oxidation and decomposition of CNTs.

Thermal Behavior of Carbon Nanotubes in Alumina Matrix Nanocomposites

2007 ◽  
pp. 755-758
Author(s):  
Sung Tag Oh ◽  
Seung Hwa Yoo ◽  
Jae Kyo Jang ◽  
Chul Kyu Song ◽  
Yong Ho Choa ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Behavior ◽  
Alumina Matrix ◽  
Matrix Nanocomposites

scholarly journals Mechanical And Microstructural Characterization Of Copper And Carbon Nanotubes Using Nanocomposites

2017 ◽  
Vol 9 (3S) ◽  
pp. 59-65
Author(s):  
Shridhar Deshpande ◽  
Dr.Shrishail Kakkeri ◽  
Atmanand Anikivi ◽  
Chandrahas M
Keyword(s):  
Carbon Nanotubes ◽  
Microstructural Characterization

Characterization of Mechanical Properties of Carbon Nanotubes in Copper-Matrix Nanocomposites

2006 ◽  
Author(s):  
Seunghyun Baik ◽  
Byeongsoo Lim ◽  
Bumjoon Kim ◽  
Untae Sim ◽  
Seyoung Oh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Pure Copper ◽  
Copper Matrix ◽  
Mixing Process ◽  
Mechanical Mixing ◽  
Matrix Nanocomposites ◽  
Coated Carbon

Carbon nanotubes have received considerable attention because of their excellent mechanical properties. In this study, carbon nanotube - copper composites have been sintered by a mechanical mixing process. The interfacial bonding between nanotubes and the copper matrix was improved by coating nanotubes with nickel. Sintered pure copper samples were used as control materials. The displacement rate of nanotube-copper composites was found to increase at 200°C whereas that of nickel-coated nanotue-copper composites significantly decreased. The incorporation of carbon nanotubes and nickel-coated carbon nanotubes in the copper matrix decreased friction coefficients and increased the time up to the onset of scuffing compared with those of pure copper specimens.

Development and Characterization of the Al2O3-YAG Ceramic Composites

2014 ◽  
Vol 798-799 ◽  
pp. 383-388 ◽  
Author(s):  
Eduardo Sousa Lima ◽  
A.P.O. Santos ◽  
L.M. Itaboray ◽  
C. Santos ◽  
R.F. Cabral
Keyword(s):  
Relative Density ◽  
Microstructural Characterization ◽  
Ceramic Composites ◽  
Oxide Ceramic ◽  
X Ray Diffraction ◽  
Powder Mixtures ◽  
X Ray ◽  
Resistance To Oxidation ◽  
Oxidation And Corrosion

YAG (Y3Al5O12) and Al2O3 ceramics have high resistance to oxidation and corrosion in harsh environments and high temperatures, which turns into a quite attractive material as compared to other ceramics. Thus, lately oxide ceramic YAG has been extensively used as reinforcement phase to Al2O3 in order to obtain a composite with improved mechanical properties. This research focused on the development of sintered Al2O3-Y2O3 powder mixtures for the production of Al2O3-YAG composite. Powder mixtures composed of 63.65:36.35wt.% and 80.00:20.00wt.% of Al2O3 and Y2O3, respectively, were milled by planetary milling for 2h. The compositions were compacted by cold uniaxial pressing, at 70 MPa, for 30s. The two mixtures were sintered at 1500 and 1600°C for 3h. The samples were evaluated for relative density, shrinkage, weight loss, and X-Ray Diffraction (XRD). Scanning Electron Microscopy (SEM) was used for microstructural characterization. The X-Ray Diffraction showed the presence of Al2O3 and Y3Al5O12 as crystalline phases in both compositions. Samples composed by 80:20wt.% of Al2O3/Y2O3 powder sintered at 16000C-3h presented the higher relative density ranging around 86% of theoretical density.

Microstructural characterization of corn starch-based porous thermoplastic composites filled with multiwalled carbon nanotubes

2012 ◽  
Vol 127 (1) ◽  
pp. 812-820 ◽  
Author(s):  
Hilmi Yurdakul ◽  
Oya Durukan ◽  
A. Tugrul Seyhan ◽  
Hande Celebi ◽  
Mustafa Oksuzoglu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Corn Starch ◽  
Microstructural Characterization ◽  
Thermoplastic Composites ◽  
Multiwalled Carbon

SYNTHESIS AND CHARACTERIZATION OF CARBON NANOTUBES REINFORCED POLYMER NANOCOMPOSITES

2009 ◽  
Vol 08 (03) ◽  
pp. 237-242 ◽  
Author(s):  
MOHAMED A. ETMAN ◽  
R. M. RASHAD ◽  
M. K. BEDEWY
Keyword(s):  
Carbon Nanotubes ◽  
Matrix Material ◽  
Morphological Characterization ◽  
Experimental Program ◽  
Enhancement Effect ◽  
Reinforced Polymer ◽  
The Matrix ◽  
Matrix Nanocomposites ◽  
Strength And Ductility

An experimental program was designed to synthesize and characterize carbon nanotubes (CNTs) and CNTs reinforced polymeric matrix nanocomposites. PMMA, and PS, matrices were adopted for this investigation using different percents of CNTs loading of 0, 1, 3, and 5 and wt%. Morphological characterization was carried out using SEM, TEM, and TEDM microscopy. Mechanical properties were also measured to evaluate the enhancement effect of the CNTs loading percent. The results revealed a remarkable enhancement of the strength and ductility of the matrix material at 3 wt% of reasonably dispersed CNTs.

scholarly journals Microstructural characterization of ball-milled metal matrix nanocomposites (Cr, Ni, Ti)-25 wt% (Al2O3np, SiCnp)

2016 ◽  
Vol 36 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Y. Afkham ◽  
R. Azari Khosroshahi ◽  
R. Taherzadeh Mousavian ◽  
D. Brabazon ◽  
R. Kheirifard
Keyword(s):  
Metal Matrix ◽  
Microstructural Characterization ◽  
Metal Matrix Nanocomposites ◽  
Matrix Nanocomposites
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