Multifunctional composites: optimizing microstructures for simultaneous transport of heat and electricity

Area of Science:

• Materials Science
• Multifunctional Composites
• Transport Phenomena

Background:

• Composite materials offer multifunctionality by combining material properties.
• Biological materials are nature's examples of multifunctional composites.
• Demonstrating competing property demands on microstructures is challenging.

Purpose of the Study:

• To illustrate microstructural design in multifunctional optimization.
• To maximize simultaneous heat and electrical transport in composites.
• To explore the relationship between microstructure and competing properties.

Main Methods:

• Utilized rigorous optimization techniques for three-dimensional, two-phase composites.
• Focused on maximizing coupled heat and electrical transport.
• Investigated the resulting microstructural architectures.

Main Results:

• Identified bicontinuous triply periodic minimal surfaces as optimal structures.
• Demonstrated a specific microstructure for enhanced simultaneous transport.
• Revealed complex microstructures arising from optimization.

Conclusions:

• Optimal microstructures for simultaneous heat and electrical transport are bicontinuous minimal surfaces.
• This finding provides insight into designing advanced multifunctional materials.
• The study highlights the role of microstructure in achieving competing material properties.