Study on the Mechanical Properties of Bionic Coupling Layered B₄C/5083Al Composite Materials

Area of Science:

• Materials Science
• Composite Materials
• Biomimetics

Background:

• Shell microstructures of Meretrix lusoria and Rapana venosa exhibit unique layered and hardness characteristics.
• Understanding these natural structures can guide the design of advanced engineering materials.

Purpose of the Study:

• To fabricate bionic coupling layered Boron Carbide/5083 Aluminum (B₄C/5083Al) composites.
• To investigate the mechanical properties and functional mechanisms of these biomimetic composites.

Main Methods:

• Fabrication of layered composites using hot pressed sintering, mimicking shell structures.
• Utilizing B₄C/5083Al composites as hard layers and pure 5083Al as soft layers.
• Characterization of microstructural and mechanical properties.

Main Results:

• Bionic layered composites exhibited enhanced flexural strength, fracture toughness, compressive strength, and impact toughness compared to monolithic composites.
• Hard layers effectively absorbed applied loads, while soft layers mitigated crack propagation and slabbing.
• Successful replication of shell-like layered structures and hardness gradients.

Conclusions:

• The bionic fabrication approach is feasible and practical for improving ceramic/Al composites.
• The developed composites offer a promising combination of lightweight and high mechanical strength.
• This study provides a novel method for designing high-performance composite materials inspired by nature.