Processing and characterization of spark plasma sintered copper/carbon nanotube composites

One Step Synthesis of Covalent Connected Three-dimensional Graphene/Carbon Nanotube for Olaquindox Electrochemical Sensor

“…2A. The calculated I D /I G ratios of graphene and CNTs were 0.60 35 and 0.78, 36 respectively. Figure 2A displays a I D /I G ratio of 0.70 for the 3D G/CNT hybrid.…”

“…The I D /I G ratio probably presents the hybrids of graphene and the CNTs and shows an increase in the purity and crystallinity of the CNTs. 36 Figure 2B indicates a typical XRD spectrum of the 3D G/CNT hybrid. The XRD pattern shows two diffraction peaks at approximately 25°and 43°.…”

Corrosion behaviour of cast and deformed copper-carbon nanotube composite wires in chloride media

“…The basic powder metallurgy method processing steps to produce CNT-Cu material can be roughly classified as follows, with the standard process steps typically utilized shown in bold (Daoush et al, 2009;Deng et al 2017;Huang et al 2017;Nayan et al, 2017;Wang et al, 2018):…”

“…Functionalization of CNTs in acids before introduction to Cu salts in an ethanol solution has been shown to achieve a homogeneous mixture of CNTs/Cu, as a precursor to forming CNT/Cu powder for later sintering, by the so called molecular level mixing method (e.g., Cha et al, 2005;Kim et al, 2007Kim et al, , 2008Kim et al, , 2011. However, considerable agglomeration of CNTs is typically reported as a problem of high temperature methods, when the nanotube fraction increases beyond ~1-2 wt% (e.g., Huang et al 2017;Deng et al 2017;Daoush et al, 2009;Nayan et al, 2017), which also leads to increased porosity of the composite (Guiderdoni et al, 2013). Mechanical dispersion of CNTs with copper requires considerable energy, which could deteriorate the CNT quality by shortening and causing curvature of the tubes (Tan et al, 2006;Nayan et al, 2017).…”

“…However, considerable agglomeration of CNTs is typically reported as a problem of high temperature methods, when the nanotube fraction increases beyond ~1-2 wt% (e.g., Huang et al 2017;Deng et al 2017;Daoush et al, 2009;Nayan et al, 2017), which also leads to increased porosity of the composite (Guiderdoni et al, 2013). Mechanical dispersion of CNTs with copper requires considerable energy, which could deteriorate the CNT quality by shortening and causing curvature of the tubes (Tan et al, 2006;Nayan et al, 2017). The properties of CNT-Cu composites and their relation to the production process are discussed in the next section.…”