Electrical conductivity, mechanical strength and corrosion characteristics of spark plasma sintered Al-Nb nanocomposite

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

“…Among methods of Al‐based in situ composite production, one can distinguish heating‐based bonding (plasma sintering, [ 5 ] friction stir welding, resistance welding, [ 6 ] stir casting, [ 7,8 ] etc.) and mechanical bonding (spray deposition techniques, [ 9 ] cold rolling, [ 10–12 ] and diffusion bonding [ 13 ] ).…”

“…Conventional methods of synthesis of Nb–Al intermetallic compounds include powder metallurgy [ 32 ] reaction sintering, [ 33 ] and spark plasma sintering. [ 5 ] A common drawback of these diffusion reaction–based approaches is the inhomogeneous distribution of components inevitably deteriorating the properties of the materials. Severe plastic deformation is a well‐established approach for improvement of the components’ homogeneity at least for two reasons.…”

“…An example of such combination is the Al–Nb system, which allows one to benefit from both the light weight of Al and high strength and electrical conductivity of Nb in frames of creation of a composite with an attractive set of properties. [ 5 ] This work is focused on the synthesis of Al–Nb composites by means of solid‐state welding of thin discs and analysis of their mechanical properties and postdeformational annealing behavior.…”

“…Al–Nb composites were shown to have enhanced electrical properties by comparison to pure Al, [ 5,35 ] which along with the improved mechanical characteristics makes them a promising candidate for various electrotechnical applications.…”

Spark Plasma Sintering of Aluminum-Based Powders Reinforced with Carbon Nanotubes: Investigation of Electrical Conductivity and Hardness Properties

“…The tests were performed applying a force of 100 g for 15 s. The HNV values were calculated by dividing the load by the surface area of the indentation. Thereafter, the tensile and yield strengths were calculated using the method of Cahoon et al [ 29 ], which has been used previously by Ujah et al [ 30 , 31 ], given in the following equations: where T is the tensile strength of the material (MPa), Y is yield strength of the material (MPa), is microhardness of the material (N/m 2 ) and n is the strain-hardening coefficient of the material. For this work, n was taken as 0.2 as reported by Callister [ 32 ].…”