2D materials-based metal matrix composites

Abstract

2D materials including graphene, transition metal dichalcogenide and hexagonal boron nitride (h-BN) have been widely incorporated with metal matrix to form 2D composites. These composites could be widely applied in the field of automotive, aerospace and marine technologies. Due to the strong covalent bonding and unique laminated structure of 2D materials, they can be used as structural reinforcement in metal matrix for enhanced mechanical and tribological properties. In this review, we first introduced various fabrication techniques for achieving high-reinforcement materials (graphene, MoS 2 , WS 2 and h-BN) loading ratio and uniform distribution in the composites. Despite the availability of some conventional methods, we have also discussed novel approaches such as wet chemistry, hot extrusion and compression shearing for reducing contamination and minimizing energy consumption during the fabrication process. Examples of graphene-reinforced Al and Mg matrix composites are discussed where the graphene could effectively increase the tensile strength, compressive strength and hardness of the composites. We have also discussed the use of MoS 2 , WS 2 and h-BN as self-lubrication additives in Al and Cu matrix to reduce the friction coefficient and wear rate.

Oxidization‐Temperature‐Triggered Rapid Preparation of Large‐Area Single‐Crystal Cu(111) Foil

“…Because of the superior thermal and mechanical properties of both graphene and Cu, graphene/Cu composites have been widely investigated and exhibit great potential in future applications, such as in the thermal management and composite reinforcement fields. [ 33–35 ] The significantly increased thermal conductivity of single‐crystal Cu(111) (306.0 W m −1 K −1 ) was first confirmed in comparison with the initial polycrystalline Cu (297.0 W m −1 K −1 ) (Figure S36, Supporting Information). Furthermore, the significant reduction of the grain boundary density in both the graphene film and the Cu(111) foil improves the thermal conductivity of our graphene/single‐crystal Cu(111) composite from ≈309.6 to ≈333.7 W m −1 K −1 (Figure 4c), equal to an enhancement of ≈7.8% compared to its polycrystalline counterpart.…”

Two-dimensional group-III nitrides and devices: a critical review

“…The synthesis of hexagonal boron nitride (h-BN) has mainly used exfoliation [115] and CVD [116,117]. Exfoliation is a purely physical method to separate the different layers by overcoming the weak van der Waals force between the different layers via mechanical and solvothermal forces [118,119].…”

Structural properties and hydrogen evolution reactions of predicted two-dimensional V n C n (n = 2, 3, 6) with first-principles calculations

“…Two-dimensional (2D) materials have received extensive attention due to their potential applications in mechanics, electricity, optics and catalysis [1][2][3][4]. The rapid development of nanoengineering [5] and 2D materials have paved the way for the exploration of novel 2D materials for reinforcement in composite materials [6], electrochemical energy storage [7,8], photodetector [9,10], and so forth. In catalytic applications, 2D layered materials, such as MoS 2 [11][12][13], metal phosphides [14], have been proposed as promising catalysts with high activity toward the HER due largely to their large surface areas.…”