This work presents a novel fabrication approach of multiwalled carbon nanotubes (MWNTs) reinforced copper (Cu) matrix\r\nnanocomposites. A combination of nanoscale dispersion of functionalized MWNTs in low viscose media of dissolved paraffin wax\r\nunder sonication treatment followed by metal injection molding (MIM) technique was adopted. MWNTs contents were varied\r\nfrom 0 to 10 vol.%. Information about the degree of purification and functionalization processes, evidences on the existence of the\r\nfunctional groups, effect of sonication time on the treated MWNTs, and microstructural analysis of the fabricated Cu/MWNTs\r\nnanocomposites were determined using TEM, EDX, FESEM, and Raman spectroscopy analysis. The results showed that the\r\nimpurities of the pristine MWNTs such as Fe, Ni catalyst, and the amorphous carbon have been significantly removed after\r\npurification process. Meanwhile, FESEM and TEM observations showed high stability of MWNTs at elevated temperatures and\r\nuniform dispersion of MWNTs in Cu matrix at different volume fractions and sintering temperatures (950, 1000 & 1050�°C). The\r\nexperimentally measured thermal conductivities of Cu/MWNTs nanocomposites showed remarkable increase (11.25% higher than\r\nsintered pure Cu) with addition of 1 vol.% MWNTs, and slight decrease below the value of sintered Cu at 5 and 10 vol.% MWNTs.
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