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Title: Effect of milling time and CNT concentration on hardness of CNT/Al{sub 2024} composites produced by mechanical alloying

Abstract

Carbon nanotube/2024 aluminum alloy (CNT/Al{sub 2024}) composites were fabricated with a combination of mechanical alloying (MA) and powder metallurgy routes. Composites were microstructurally and mechanically evaluated at sintering condition. A homogeneous dispersion of CNTs in the Al matrix was observed by a field emission scanning electron microscopy. High-resolution transmission electron microscopy confirmed not only the presence of well dispersed CNTs but also needle-like shape aluminum carbide (Al{sub 4}C{sub 3}) crystals in the Al matrix. The formation of Al{sub 4}C{sub 3} was suggested as the interaction between the outer shells of CNTs and the Al matrix during MA process in which crystallization took place after the sintering process. The mechanical behavior of composites was evaluated by Vickers microhardness measurements indicating a significant improvement in hardness as function of the CNT content. This improvement was associated to a homogeneous dispersion of CNTs and the presence of Al{sub 4}C{sub 3} in the aluminum alloy matrix. - Highlights: Black-Right-Pointing-Pointer The 2024 aluminum alloy was reinforced by CNTs by mechanical alloying process. Black-Right-Pointing-Pointer Composites were microstructural and mechanically evaluated after sintering condition. Black-Right-Pointing-Pointer The greater the CNT concentration, the greater the hardness of the composites. Black-Right-Pointing-Pointer Higher hardness in composites is achieved at 20 hmore » of milling. Black-Right-Pointing-Pointer The formation of Al{sub 4}C{sub 3} does not present a direct relationship with the milling time.« less

Authors:
 [1];  [2];  [1];  [3];  [1];  [1]
  1. Centro de Investigacion en Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnologia, Miguel de Cervantes No.120, C.P. 31109, Chihuahua, Chih. (Mexico)
  2. Universidad Autonoma de Chihuahua (UACH), Facultad de Ingenieria, Circuito No. 1 Nuevo Campus Universitario, C.P. 31125, Chihuahua, Chih. (Mexico)
  3. Centro de Investigacion en Materiales Avanzados S.C. (CIMAV), Unidad Mty, Autopista Monterrey-Aeropuerto Km 10, A. P. 43, C.P. 66600, Apodaca, N.L. (Mexico)
Publication Date:
OSTI Identifier:
22163165
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 75; Journal Issue: Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; ALUMINIUM CARBIDES; CARBON NANOTUBES; CRYSTALLIZATION; CRYSTALS; DISPERSIONS; FIELD EMISSION; INTERACTIONS; MICROHARDNESS; MICROSTRUCTURE; MILLING; POWDER METALLURGY; SCANNING ELECTRON MICROSCOPY; SINTERING; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Perez-Bustamante, R., Perez-Bustamante, F., Estrada-Guel, I., Licea-Jimenez, L., Miki-Yoshida, M., and Martinez-Sanchez, R., E-mail: roberto.martiez@cimav.edu.mx. Effect of milling time and CNT concentration on hardness of CNT/Al{sub 2024} composites produced by mechanical alloying. United States: N. p., 2013. Web. doi:10.1016/J.MATCHAR.2012.09.005.
Perez-Bustamante, R., Perez-Bustamante, F., Estrada-Guel, I., Licea-Jimenez, L., Miki-Yoshida, M., & Martinez-Sanchez, R., E-mail: roberto.martiez@cimav.edu.mx. Effect of milling time and CNT concentration on hardness of CNT/Al{sub 2024} composites produced by mechanical alloying. United States. doi:10.1016/J.MATCHAR.2012.09.005.
Perez-Bustamante, R., Perez-Bustamante, F., Estrada-Guel, I., Licea-Jimenez, L., Miki-Yoshida, M., and Martinez-Sanchez, R., E-mail: roberto.martiez@cimav.edu.mx. Tue . "Effect of milling time and CNT concentration on hardness of CNT/Al{sub 2024} composites produced by mechanical alloying". United States. doi:10.1016/J.MATCHAR.2012.09.005.
@article{osti_22163165,
title = {Effect of milling time and CNT concentration on hardness of CNT/Al{sub 2024} composites produced by mechanical alloying},
author = {Perez-Bustamante, R. and Perez-Bustamante, F. and Estrada-Guel, I. and Licea-Jimenez, L. and Miki-Yoshida, M. and Martinez-Sanchez, R., E-mail: roberto.martiez@cimav.edu.mx},
abstractNote = {Carbon nanotube/2024 aluminum alloy (CNT/Al{sub 2024}) composites were fabricated with a combination of mechanical alloying (MA) and powder metallurgy routes. Composites were microstructurally and mechanically evaluated at sintering condition. A homogeneous dispersion of CNTs in the Al matrix was observed by a field emission scanning electron microscopy. High-resolution transmission electron microscopy confirmed not only the presence of well dispersed CNTs but also needle-like shape aluminum carbide (Al{sub 4}C{sub 3}) crystals in the Al matrix. The formation of Al{sub 4}C{sub 3} was suggested as the interaction between the outer shells of CNTs and the Al matrix during MA process in which crystallization took place after the sintering process. The mechanical behavior of composites was evaluated by Vickers microhardness measurements indicating a significant improvement in hardness as function of the CNT content. This improvement was associated to a homogeneous dispersion of CNTs and the presence of Al{sub 4}C{sub 3} in the aluminum alloy matrix. - Highlights: Black-Right-Pointing-Pointer The 2024 aluminum alloy was reinforced by CNTs by mechanical alloying process. Black-Right-Pointing-Pointer Composites were microstructural and mechanically evaluated after sintering condition. Black-Right-Pointing-Pointer The greater the CNT concentration, the greater the hardness of the composites. Black-Right-Pointing-Pointer Higher hardness in composites is achieved at 20 h of milling. Black-Right-Pointing-Pointer The formation of Al{sub 4}C{sub 3} does not present a direct relationship with the milling time.},
doi = {10.1016/J.MATCHAR.2012.09.005},
journal = {Materials Characterization},
issn = {1044-5803},
number = Complete,
volume = 75,
place = {United States},
year = {2013},
month = {1}
}