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Strengthening of copper matrix composites by nickel-coated single-walled carbon nanotube reinforcements

2008; Elsevier BV; Volume: 159; Issue: 5-6 Linguagem: Inglês

10.1016/j.synthmet.2008.10.017

1879-3290

Chulju Kim, Byengsoo Lim, Bumjoon J. Kim, Untae Shim, Se‐Young Oh, Byungho Sung, Jeehoon Choi, Jaehyung Ki, Seunghyun Baik,

Carbon Nanotubes in Composites

Mechanical, electrical and thermal properties of nickel-coated single-walled carbon nanotube (SWNT) reinforced copper matrix composites were investigated. The composites were fabricated by means of a powder metallurgy process, which consists of mixing nickel-coated carbon nanotubes with copper powders followed by hot-pressing. A homogeneous mixture could be obtained by the mechanical mixing process due to the similar density of nickel and copper. A high temperature displacement rate tester and a ball-on-disk device were employed to evaluate mechanical and tribological properties. Also, a four-point probe technique and a laser flash method were used to obtain electrical resistance and thermal conductivity. The mechanical and tribological properties of the copper matrix composites significantly improved by the incorporation of nickel-coated SWNT reinforcements. However, electrical resistance and thermal conductivity of the nickel-coated SWNT reinforced copper matrix composites were similar to those of the sintered nickel–copper specimens with the equivalent composition.