Preparation and mechanical properties of aluminum-matrix composites with layered architecture

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-03-20 DOI:10.1016/j.coco.2025.102354

Min Gao , Xuexi Zhang , Mingfang Qian , Lin Geng

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引用次数: 0

Abstract

Aluminum-matrix nanocomposites (AMCs) reinforced by SiC nanoparticles (SiCnp) were prepared by directional freezing combined with spark plasma sintering (SPS) and hot extrusion. The effect of SiCnp and layered structure on the microstructure and mechanical properties of SiCnp/Al nanocomposites was studied. The composite showed a layered structure consisting of SiCnp-rich and poor areas. With addition of 1 wt% SiCnp with average diameter 50 nm, the composite showed the best strength and toughness matching, with ultimate tensile strength (UTS) 326.2 MPa (35.4 % higher than that of homogeneous counterpart) and fracture elongation 8.6 %. The enhanced UTS in the layered nanocomposite was mainly attributed to the hetero-structure-induced formation of high density geometrically necessary dislocation (GND) in the near SiC-Al interface areas, which accordingly created pronounced hetero-deformation-induced (HDI) stress and work hardening capacity. The creation of layered architecture by feasibly directional freezing can advance the development of biomimetic layered composites with enhanced strength and toughness.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.