Consolidation of Carbon Nanotube Reinforced Aluminum Matrix Composites by High-Pressure Torsion
SCIE
SCOPUS
- Title
- Consolidation of Carbon Nanotube Reinforced Aluminum Matrix Composites by High-Pressure Torsion
- Authors
- Asgharzadeh, H; Joo, SH; Kim, HS
- Date Issued
- 2014-08
- Publisher
- SPRINGER
- Abstract
- Al-3 vol pct carbon nanotube (CNT) composites are fabricated by consolidation through high-pressure torsion (HPT) at room temperature. The densification behavior, microstructural evolution, and mechanical properties of Al/CNT composites are studied. The results show that density and microstructural homogeneity increase with increasing number of revolutions under a high pressure of 6 GPa. Substantial grain refinement is achieved after 10 turns of HPT with an average grain thickness of similar to 38 nm perpendicular to the compression axis of HPT. The Al/CNT composite shows a considerable increase in hardness and strength compared to the Al matrix. The strengthening mechanisms of the Al/CNT composite are found to be (i) grain refinement of Al matrix and (ii) Orowan looping. Raman spectroscopy and high-resolution transmission electron microscopy reveal that the structure of most of CNTs is changed during processing through mechanical milling and HPT.
- Keywords
- SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; WALLED CARBON; NANOTUBE/ALUMINUM COMPOSITES; STRENGTHENING MECHANISMS; POWDER-METALLURGY; BEHAVIOR; ALLOY; EVOLUTION; MICROSTRUCTURE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13181
- DOI
- 10.1007/S11661-014-2354-6
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 45A, no. 9, page. 4129 - 4137, 2014-08
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