Effect of carbon nano-tubes and dispersions of SiC and Al2O3 on the mechanical and physical properties of copper-nickel alloy

Abstract

This paper investigates the mechanical and physical properties of Cu-Ni alloy (at 50-50 wt. %), mixed with different reinforcement materials such as carbon nanotubes CNT (0.5–2 wt. %) as nano particles, Al2O3 (1–4 wt. %) and SiC (1–4 wt. %) as microparticles. The obtained composite specimens characteristics were evaluated such as microstructure, density, electrical conductivity, thermal conductivity, hardness, and compression properties to determine the suitable reinforcement percentage that has the best physical and mechanical properties. The micron-sized Al2O3 and SiC and nano-sized CNT were added to enhance the mechanical and physical properties of the composite. The hardness and compression yield stress of Cu-Ni base composites have shown the most positive enhancement values of up to 135 % and 136 % of the matrix, respectively.

Electrical discharge machining of ceramic nanocomposites: sublimation phenomena and adaptive control

“…A material is considered a conductor if the specific electrical resistance ρ < 10 −5 Ω m and a dielectric if ρ > 10 8 Ω m. It should be noted that the electrical resistance of good conductors can be as low as 10 −8 Ω m, and for the best dielectrics, it can exceed 10 16 Ω m [125, 126]. Thus, the ceramic samples of VOK-6O and sintered Al 2 O 3 +SiC w +TiC can be called conductors with threshold specific electrical resistances, which are suitable for EDM [127, 128, 129, 130].…”

Synergetic Reinforcement of Cu-11.0 wt.% Al Alloy with Al2O3 Nano-Sized Particles and Carbon Nanotubes CNTs

“…Therefore, this research suggested to an efficient method to obtain a good mixture by employing a chemical factor as cyclohyxane (C 6 H 12 ) with paraffin wax as a lubricant material to lower friction and create appropriate medium to perform the mix process between CNT with the Cu/Al powder [17]. The preparing blended powder of plain alloy and their composites were loaded gradually into steel die of a cavity cylinder its inner diameter is ~ 8.0 mm and its height~50.0 mm.…”

Influence of carbon nanotubes and dispersions of SiC on the physical and mechanical properties of pure copper and copper‐nickel alloy

“…For copper-based alloys, the most important alloying elements used are silicon, tin, aluminium, zinc and nickel. Those elements, except for nickel, have limited solubility in the solid form (8 %, 9 %, 19 % and 37 %, at maximum), respectively [1,4,5]. Nickel has a positive influence on the mechanical and physical properties of copper-nickel alloys in terms of liquidus and solidus temperatures and corrosion resistance.…”

“…Previously, some researches were concerned with improving the mechanical properties (hardness, compression …, etc. ), thermal and electrical conductivities of copper-nickel composites [4,8,[15][16][17]. Moreover, some studies concentrated on powder metallurgy technique for processing silicon carbide (SiC) ceramic powder and for carbon nanotubes as reinforcements [4,[17][18][19][20].…”