Behaviour of Al2O3 in aluminium matrix composites: An overview

Abstract

In this paper, behaviour of Al2O3 in aluminium matrix composites is reviewed for its properties and applications. In addition, many metal matrix composite fabrication processes are also elaborated. In the present days the aluminium metal matrix composite is in high demand because of its superior properties. Its demand is still on rise because of its widespread use in automotive industries, aerospace industries and marine industries. The method of the fabrication of aluminium matrix-based composite is also a deciding factor for its resultant properties. Desired composite-properties are achievable by proper selection of reinforcing materials as well as the physical conditions. Various sections of current information compile the details about the behaviour of alumina particles in aluminium-based matrix for formation of metal matrix composites.

Nano-Sized Al2O3–Gr Reinforced Al7075 Hybrid Composite: Impact of Cooling Agents on Mechanical, Wear, and Fracture Behavior

“…The tensile and hardness strength have also increased noticeably. Similar outcomes were found by other researchers, 12,37 and it is assumed that the Al grain usually hardens adjacent to the hard particles, weakening the barrier to grain refinement. 3.2.…”

“…Therefore, the increased hardness may be responsible for MMCs’ high compression strength. Singh et al 12 demonstrated that, during the casting stir process, the value of compression strength is greatly increased when we increase the content of alumina reinforcement. Additionally, it has been found that increasing the amount of alumina reinforcement causes a significant increase in the metal matrix’s compressive strength during the casting stir process.…”

“…There may also be unintended interactions between reinforcements and the matrix . To prevent these problems, process variables like melt holding temperature, melting stirring time, molten metal temperature, choice of a suitable matrix, and reinforcement must be carefully regulated . In general, the wettability of reinforcements is one issue with the stir-casting procedure used to fabricate composites.…”

“… 11 To prevent these problems, process variables like melt holding temperature, melting stirring time, molten metal temperature, choice of a suitable matrix, and reinforcement must be carefully regulated. 12 In general, the wettability of reinforcements is one issue with the stir-casting procedure used to fabricate composites. The limited wettability causes reinforcements to be distributed unevenly.…”

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

“…Dispersion-strengthened metal and polymer composites [1], in particular particulatereinforced aluminum matrix composites (PAMCs) [2], are promising structural materials. Their operational properties can significantly exceed the properties of the material used to form the matrix, due to the enhancement of the properties of this material.…”