【摘 要】
：
Multiwalled carbon nanotubes (CNTs) were coated by a molybdenum layer using carbonyl thermal decomposition process with a precursor of molybdenum hexacarbonyl.T
【机 构】
：
School of Materials Science and Engineering,China Iron & Steel Research Institute Group
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Multiwalled carbon nanotubes (CNTs) were coated by a molybdenum layer using carbonyl thermal decomposition process with a precursor of molybdenum hexacarbonyl.The Mo-coated CNTs (Mo-CNTs) were added into copper powders to fabricate Mo-CNT/Cu composites by means of mechanical milling followed by spark plasma sintering.The Mo-CNTs were uniform dispersion in the Cu matrix when their contents were 2.5 vo1.％-7.5 vol.％,while some Mo-CNT clusters were clearly observed at additions of 10.0 vo1.％-15.0 vol.％ Mo-CNTs in the mixture.The mechanical,electrical,and thermal properties of the Mo-CNT/Cu composites were characterized,and the results showed that the tensile strength and hardness were 2.0 and 2.2 times higher than those of CNT-free specimens,respectively.Moreover,the Mo-CNT/Cu composites exhibited an enhanced thermal conductivity but inferior electrical conductivity compared with sintered pure Cu.The uncoated CNT/Cu composites were fabricated by the similar processes,and the measured tensile strength,hardness,thermal conductivity,and electricad conductivity of the CNT/Cu composites were lower than those of the Mo-CNT/Cu composites.
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