| Title |
Tensile Behavior of Carbon Nanofiber Reinforced Cu Matrix Composite by Liquid Infiltration Process |
| Authors |
장영환(Young Hwan Jang); 김상식(Sang Shik Kim); 정윤철(Yun Chul Jung); 이상관(Sang Kwan Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Carbon nanofiber; Cu matrix composite; Liquid infiltration process |
| Abstract |
In the present study, the unidirectionally aligned carbon nanofiber (CNF) reinforced Cu composite was fabricated by the liquid infiltration process, and the deformation behavior of the composite was evaluated. For the unidirectional alignment of the severely entangled CNFs, the mechanical drawing process was utilized. The bundle of drawn Cu tubes compacted with the unidirectionally aligned CNFs was placed on the specially designed mold, which was subsequently canned, degassed, evacuated, heated at 1100℃ for 10 minutes in the electric furnace to liquefy the Cu, and finally transferred to the press. The optical and SEM micrographic observations of the final product demonstrated that, even though the CNFs were not uniformly distributed throughout the specimen due to the molten metal flow during melting process, the local unidirectionality was found to be preserved in those areas where the CNFs were densely distributed. Tensile test results showed that approximately two-fold increase in the tensile strength was obtained with the CNF reinforced Cu composite. Based on the micrographic and fractographic observations, the strengthening mechanism of the CNF reinforced Cu composite fabricated by the liquid infiltration process was discussed. (Received March 2, 2004) |