Effect of CNTs in Copper Matrix on Mechanical Characteristics and Tribological Behavior under Dry Sliding and Boundary Lubrication Conditions

Abstract

In the present work, the mechanical and tribological properties of carbon nanotube (CNT)-reinforced Cu matrix composites featuring 0–1.8 vol% CNTs prepared by spark plasma sintering under dry sliding and boundary lubrication conditions were investigated. The results of microstructure revealed that the bonding interface in Cu/CNT composites was very well established. Additionally, the addition of CNTs has a positive effect on improving the hardness and tensile strength of the composites, while the stress–strain response quasi-static tensile test confirms the same results. CNTs are proved to lead to certain self-lubrication. The addition of CNTs could result in decreased coefficient of friction (COF) and wear rates by reducing adhesive wear under dry sliding conditions, while the oil lubricating film was the major reason for decreased COF under boundary lubrication conditions.

Tribological properties of PTFE/PI-PAI composite coatings filled by GO/ ZrO2 on the surfaces of different micro-textures

“…Zhao et al [7] studied that the CoF of copper alloy under boundary lubrication was 0.208 at a load of 10 N and a reciprocating speed of 600 rpm. Yang et al [8] introduced the CoF of CuSn10Bi3 which was up to 0.18 under specific conditions (e.g., load 100 N, sliding speed 6.1 m/s and boundary lubrication).…”

Effect of Extrusion Temperature on the Microstructure and Mechanical Properties of SiCnw/2024Al Composite

“…Recently, composites materials reinforced with nano-phases, such as ceramic nano-particles [1,2], carbonous nano-phase (CNT) [3,4] and graphene [5,6] have been widely explored. Besides the above phases, SiC nanowires are also very promising to be used as reinforcement materials [7,8].…”

Effect of Long Used Machine Oil on the Tribological Behaviour of Cu-Based Gear Materials

“…There are some variations in color between them due to the presence of different alloying elements [31]. Massive wear particles, oxide debris, and deep grooves parallel to the sliding direction are seen on the surface when the alloys undergo dry sliding conditions [32]. Cu and α-brass can also be found to have plastic deformation and several large cracks.…”