Effects of carbon nanotube reinforcement and grain size refinement mechanical properties and wear behaviors of carbon nanotube/copper composites

Carbon nanotube reinforced copper alloy (CNT/Cu) composites with high strength and good wear resistance have been developed using acid treatment, sintering processes and consolidation techniques. The effects of CNT reinforcement and grain size refinement on the mechanical properties and surface defo...

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Bibliographic Details
Published in:Diamond and related materials 2017-04, Vol.74, p.197-204
Main Authors: Tsai, Ping-Chi, Jeng, Yeau-Ren, Lee, Jian-Ting, Stachiv, I., Sittner, P.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Coating effects
Composites
Consolidation
Copper
Copper base alloys
Deformation
Grain size
High resolution
High strength
Mechanical properties
Nanoindentation
Oxides
Protective coatings
Reinforcement
Scanning electron microscopy
Sintering
Spectroscopic analysis
Surface deformations
Transmission electron microscopy
Wear resistance
Wear tests
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Summary:Carbon nanotube reinforced copper alloy (CNT/Cu) composites with high strength and good wear resistance have been developed using acid treatment, sintering processes and consolidation techniques. The effects of CNT reinforcement and grain size refinement on the mechanical properties and surface deformations of CNT/Cu composite coatings are investigated by means of nanoindentation and block-on-ring wear tests, respectively. High-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses reveal that the CNTs are firmly implanted in the Cu alloy due to the formation of Cu-oxides at the CNT-Cu interface. The effect of CNT addition on the CNT/Cu coating strength is significantly greater than that of grain size reinforcement. Finally, the present results indicate that the addition of CNTs to the Cu matrix reduces the surface deformations of the CNT/Cu composite coatings due to the formation of a carbonaceous solid-lubricant film at the contact interface during sliding. [Display omitted] •Grain size refinement and CNT reinforcement for CNT/Cu composite are studied.•Morphological and structural characterizations of Cu-coated CNT are investigated.•Mechanical properties and surface deformations of CNT/Cu composites are examined.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2017.03.012