Direct observation of carbon nanotube induced strengthening in aluminum composite via in situ tensile tests

In situ tensile tests inside a scanning electron microscope chamber are conducted on spark plasma sintered Al and Al-1vol.% CNT composites to understand the strengthening and deformation mechanisms due to long (25–30μm) CNT reinforcement addition. Al–CNT composite shows 40% higher tensile strength,...

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Bibliographic Details
Published in:Carbon (New York) 2014-04, Vol.69, p.79-85
Main Authors: Boesl, Benjamin, Lahiri, Debrupa, Behdad, Sadegh, Agarwal, Arvind
Format: Article
Language:English
Subjects:
Aids
Aluminum
Carbon
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Particulate composites
Physics
Scanning electron microscopy
Specific materials
Strengthening
Tensile tests
Walls
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Summary:In situ tensile tests inside a scanning electron microscope chamber are conducted on spark plasma sintered Al and Al-1vol.% CNT composites to understand the strengthening and deformation mechanisms due to long (25–30μm) CNT reinforcement addition. Al–CNT composite shows 40% higher tensile strength, and 65% higher stiffness for mere 1vol.% CNT addition. The failure occurs by CNT pullout from the matrix, which is directly imaged during the tensile testing. Telescopic sliding of CNT walls is also observed which aids to strengthening.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2013.11.061