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Tensile properties of carbon nanotube reinforced aluminum nanocomposite fabricated by plasma spray forming
Authors:T Laha  Y Chen  D Lahiri  A Agarwal
Affiliation:1. Department of Mechanical and Materials Engineering, 10555 West Flagler Street, Florida International University, Miami, FL, USA;2. Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, India;1. Sustainable Environment and Energy Systems, Middle East Technical University – Northern Cyprus Campus, Guzelyurt via Mersin 10, Turkey;2. Mechanical Engineering Program, Middle East Technical University – Northern Cyprus Campus, Guzelyurt via Mersin 10, Turkey;1. Universidad Nacional de Colombia, Facultad de Minas, Departamento de Materiales y Minerales, Cl 75 No 79A 51, 050032, Colombia;2. Centro de Investigacion en Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnologia, Miguel de Cervantes 120, 31136, Chihuahua, Chih., Mexico;1. School of Engineering, RMIT University, Bundoora, Victoria 3083, Australia;2. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;4. College of Materials Science and Engineering, Jilin University, Changchun, Jilin 130025, China;5. Advanced Material Research and Development Center, Zhejiang Industry & Trade Vocational College, Wenzhou, Zhejiang 325003, China;1. Department of Mechanical Engineering, Instituto Superior Técnico, IDMEC, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Centro de Química Estrutural, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;3. Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal;1. CEMUC, Department of Metallurgical and Materials Engineering, University of Porto, R. Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Faculdade de Ciências Exatas e Tecnologia, Universidade Federal do Pará, Abaetetuba, PA 68440-000, Brazil;1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Mechanics and Aerospace Design Laboratory, University of Toronto, Toronto, ON M5S 3G8, Canada
Abstract:Uniaxial tensile tests were performed on plasma spray formed (PSF) Al–Si alloy reinforced with multiwalled carbon nanotubes (MWCNTs). The addition of CNTs leads to 78% increase in the elastic modulus of the composite. There was a marginal increase in the tensile strength of CNT reinforced composite with degradation in strain to failure by 46%. The computed critical pullout length of CNTs ranges from 2.1 to 19.7 μm which is higher than the experimental length of CNT, leading to relatively poor load transfer and low tensile strength of PSF nanocomposites. Fracture surface validates that tensile fracture is governed strongly by the constitutive hierarchical microstructure of the plasma sprayed Al–CNT nanocomposite. The fracture path in Al–CNT nanocomposite occurs in Al–Si matrix adjacent to SiC layer on CNT surface.
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