Synthesis and characterisation of nanostructured Al–Al₃V and Al–(Al₃V–Al₂O₃) composites by powder metallurgy

Abstract

In this study, the formation and characterisation of Aluminium (Al)-based composites by mechanical alloying and hot extrusion were investigated. Initially, the vanadium trialuminide (Al3V) particles with nanosized structure were successfully produced by mechanical alloying and heat treatment. Al3V–Al2O3 reinforcement was synthesised by mechanochemical reduction during milling of V2O5 and Al powder mixture. In order to produce composite powders, reinforcement powders were added to pure Al powders and milled for 5 h. The composite powders were consolidated in an extrusion process. The results showed that nanostructured Al-10 wt-% Al3V and Al-10 wt-% (Al3V–Al2O3) composites have tensile strengths of 209 and 226 MPa, respectively, at room temperature. In addition, mechanical properties did not drop drastically at temperatures of up to 300°C.

Nanosize Al2O3 reinforcement in Si-rich aluminum MMC for enhanced tribological performance in engine components

“…A powder metallurgy route has been used by a researcher to form an Al-(Al3V-Al 2 O 3 ) composite. 20 Within the scope of this study, an in-situ approach was used to develop a particulate composite by incorporating nano-sized Al 2 O 3 into an aluminum-silicon alloy. Detailed research was conducted on the mechanical and wear properties of the composite material.…”

Electrodeposition of Aluminium-Vanadium Alloys from Chloroaluminate Based Molten Salt Containing Vanadium Ions

“…Compared to Ni-based alloys that are extensively used in aircraft structures, trialuminides have 20-50% lower density. Combined with high strength and improved thermal stability, trialuminides offer a potential light-weight alternative [3,6]. Within the group of trialuminide intermetallics, vanadium trialuminide (Al 3 V) exhibits a high melting temperature (1360 • C), low density (3.34-3.68 g•cm −3 ) and excellent oxidation resistance which is presently of particular interest for high-temperature structural material applications [3,6].…”

“…The solid-state diffusion of vanadium into aluminium is very slow and rarely exceeds more than about 1% atomic fraction [8,9]. Even at those levels, its presence in aluminium increases the tensile strength at room as well as elevated temperatures [6]. Al-V alloys are playing an essential role as a source of aluminium and vanadium for α + β-titanium alloys, like Ti-6Al-4V or metastable β-titanium alloys like Ti-15V-3Cr-3Al-3Sn [2,10].…”

“…Currently, methods used in the production of Al-V alloys are mechanical alloying process, aluminothermic reduction process, and rapid solidification. In the search for desirable material attributes more attention has been focused on the development of new, innovative, and unconventional manufacturing methods [1,2,6,13,14]. Electrochemical deposition provides a very suitable way for a controlled production of pure metals or alloys.…”

Mechanical alloying and consolidation of copper‐iron‐silicon carbide nanocomposites

“…For this purpose, one of the most effective methods is the mechanical alloying technique [5]. This processing route refines the grain size toward nanoscale regime for enhancement of mechanical properties and it is known as one of the main methods for synthesizing advanced materials [6][7][8][9][10][11]. The consolidation processes, however, are required to obtain a bulk material from the mechanically alloyed powders and the involved high-temperature processing might result in grain growth of the constituent phases.…”