Fabrication, microstructures, and properties of copper matrix composites reinforced by molybdenum-coated carbon nanotubes

稀有金属（英文版）, 2011, 30(4): 401-407. doi: 10.1007/s12598-011-0404-4

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

3.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

6.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China ;China Iron & Steel Research Institute Group, Beijing 100081, China

Fabrication, microstructures, and properties of copper matrix composites reinforced by molybdenum-coated carbon nanotubes

NIE Junhui ^1, , JIA Chengchang ^2, , JIA Xian ^3, , ZHANG Yafeng ^4, , SHI Na ^5, , LI Yi ^6,

1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

3.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

6.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China ;China Iron & Steel Research Institute Group, Beijing 100081, China

Keywords： metallic matrix composites

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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Fabrication, microstructures, and properties of copper matrix composites reinforced by molybdenum-coated carbon nanotubes

参考文献