Alumina powder assisted carbon nanotubes reinforced Mg matrix composites |
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| Affiliation: | 1. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;2. School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;3. School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;1. Mechanical Engg. Department, V R Siddhartha Engg College, Vijayawada;2. Mechanical Engg. Department, AU College of Engineering, Visakhapatnam;1. Department of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, PR China;2. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China;1. Department of Materials Engineering, Federal University of São Carlos, São Carlos, 13565-905, SP, Brazil;2. LEPMI Laboratory CNRS, UMR 5266 INPG – UJF, Grenoble, BP75, 38402, St-Martin D''Hères, France;3. SIMAP Laboratory CNRS, CNRS UMR 5266.INPG – UJF, Grenoble, BP75 – 38402, St-Martin D''Hères, France;4. Saint Petersburg State University, 28 Universitetsky Prospekt, Peterhof, Saint Petersburg, 198504, Russia;5. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marx Str., Ufa, 450000, Russian Federation;6. Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK |
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| Abstract: | Mg matrix composites reinforced by carbon nanotubes (CNTs)-Al2O3 mixture, which was synthesized by in situ growing CNTs over Al2O3 particles through chemical vapor deposition (CVD) using Ni catalyst, were fabricated by means of powder metallurgy process, followed by hot-extrusion. By controlling synthesis conditions, the as-grown CNTs over Al2O3 particles possessed high degree of graphitization, ideal morphology, higher purity and homogeneous dispersion. Due to the ‘vehicle’ carrying effect of micrometer-level A2O3, CNTs were easy to be homogeneously dispersed in Mg matrix under moderate ball milling. Meanwhile, Al2O3 particles as catalyst carriers, together with CNTs, play the roles of synergistic reinforcements in Mg matrix. Consequently, the Mg matrix composites reinforced by CNTs-Al2O3 mixture exhibited remarkable mechanical properties. |
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| Keywords: | Carbon nanotubes Alumina In situ synthesis Magnesium matrix composite Chemical vapor deposition |
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