Wear behavior of Cu matrix composites reinforced with mixture of carbon and carbon nanotubes |
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Authors: | Jinlong Jiang Jianfeng Dai Hua Yang Qing Wang |
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Affiliation: | (1) School of Science, Lanzhou University of Technology, Lanzhou, 730050, China;(2) State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China |
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Abstract: | In order to improve wear resistance and decrease the cost, carbon and carbon nanotubes reinforced copper matrix composites
were fabricated by the power metallurgy method. The effects of carbon (carbon and carbon nanotubes) volume fraction and applied
load on the friction coefficient and wear rate under dry sliding of the composites were investigated at room temperature.
By scanning electron microscopy (SEM), the worn surfaces and debris were observed, and wear mechanism was also analyzed and
discussed. The experimental wear process consists of the run-in, steady wear and severe wear process with the increasing of
sliding distance. Both the friction coefficient and wear rate of the composites first decrease and then increase with the
increasing of carbon volume fraction. The minimum friction coefficient and wear rate are obtained when carbon is 4.0vol%.
The wear mechanisms of the composites change from the adhesive wear and delamination wear to abrasive wear with the increasing
of carbon volume fraction.
Funded by the National Natural Science Foundation of China (50873047) and the Natural Science Foundation of Gansu Province
(3ZS061-A25-039) |
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Keywords: | C/Cu matrix composite power metallurgy wear behavior |
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