Heteroatom Modification Enhances Corrosion Durability in High‐Mechanical‐Performance Graphene‐Reinforced Aluminum Matrix Composites

Abstract

The antagonism between strength and corrosion resistance in graphene‐reinforced aluminum matrix composites is an inherent challenge to designing reliable structural components. Heteroatom microstructural modification is highly appreciated to conquer the obstacle. Here, a bottom‐up strategy to exploit the heterogeneous phase interface to enable high corrosion durability is proposed. Deformation‐driven metallurgy derived from severe plastic deformation is developed to produce Mg‐alloyed fluorinated graphene structures with homogeneous dispersion. These structures allow for absorbing corrosion products, forming a dense protective layer against corrosion, and local micro‐tuning of the suppression of charge transfer. This results in superior corrosion resistance with an outstanding strength‐ductility balance of the composites via ultrafine‐grained and precipitation strengthening. The anti‐corrosion polarization resistance remains 89% of the initial state after 2‐month immersion in chloride‐containing environment, while the ultra‐tensile strength and elongation of 532 ± 39 MPa and 17.3 ± 1.2% are obtained. The economical strategy of heteroatom modification broadens the horizon for anti‐corrosion engineering in aluminum matrix composites, which is critical for the design of carbonaceous nanomaterial‐reinforced composites to realize desired performances for practical applications.

Effect of Temperature and Material Flow Gradients on Mechanical Performances of Friction Stir Welded AA6082-T6 Joints

“…Cracks are generated through the cavities and propagate to adjacent cavities under tensile loading. The grains in WNZ achieve dynamic recrystallization under severe plastic deformation [ 35 ], so the equiaxed grains lead to fracture morphology exhibiting a large number of tiny dimples. A large number of larger-sized dimples without defects are found in the joint by Pin-2 ( Figure 18 c,d).…”

Deformation-Driven Processing of CNTs/PEEK Composites towards Wear and Tribology Applications

“…Coatings 2022, 12, x FOR PEER REVIEW 2 of 6 strategy [13][14][15], deformation-driven processing (DDP) was proposed as a novel method to prepare carbon nanotube (CNT)-reinforced poly-ether-ether-ketone (PEEK) matrix composites with the features of short-time fabrication. This method utilizes severe plastic deformation on the blended powders to obtain uniformly distributed reinforcements.…”

“…Deformation-driven strategy, based on the principle of sufficient mixing of the materials via severe plastic deformation and high strain, shows great potential in the fabrication of metallic composites with homogeneously distributed reinforcements [12,13]. In light of the capacity of dispersing carbonaceous nanomaterials via a deformation-driven strategy [13][14][15], deformation-driven processing (DDP) was proposed as a novel method to…”

背应力平衡策略实现非均质Al-SiC复合材料的强塑 性协同

“…Especially for the SiC particles, the reinforced AMCs have attracted great attention for their low costs and high strengthening efficiency [4][5][6], and have been widely used in spacecraft such as the dual-axis antenna drive mechanism in the Zhurong rover. In consideration of the strict service conditions of aerospace and military, AMCs are required to be lighter, stronger, and more ductile [7][8][9]. However, the high strength of the reinforced AMCs is usually at the expense of a considerable ductility loss, as the grains refined by SiC particles have a low dislocation storability [10].…”