Direct synthesis of carbon nanofibers on the surface of copper powder |
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| Authors: | Larisa I Nasibulina Tatiana S Koltsova Tuomo Joentakanen Albert G Nasibulin Oleg V Tolochko Jari EM Malm Maarit J Karppinen Esko I Kauppinen |
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| Affiliation: | 1. NanoMaterials Group, Department of Applied Physics, Aalto University School of Science and Technology, P.O. Box 15100 Puumiehenkuja 2, FIN-02150 Espoo, Finland;2. Material Science Faculty, State Polytechnical University, Polytechnicheskaya, 29, 195251 Saint-Petersburg, Russia;3. Laboratory of Inorganic Chemistry, Department of Chemistry, Aalto University School of Science and Technology, P.O. Box 6100, Kemistintie 1, FIN-02150 Espoo, Finland;4. VTT Biotechnology, Biologinkuja 7, FIN-02044 Espoo, Finland |
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| Abstract: | A novel approach to synthesize carbon nanofibers (CNFs) directly on the surface of metal μm-sized particles to evenly disperse the carbon nanomaterials in a composite material was proposed. As a metal matrix, 5–10 μm copper particles were utilized. As a carbon source, C2H2, CH4 and CO were examined. The best conditions were found to be in C2H2 (30 cm3/min) and H2 (260 cm3/min) atmosphere at the temperature of 750 °C. The composites based on copper and CNFs prepared by vacuum hot pressing showed the increase in hardness from 35 to 60 kg/mm2 almost retaining pure copper electrical properties. |
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