https://onlinelibrary.wiley.com/doi/pdf/10.1002/admt.201900981

A Review on Functionally Graded Materials and Structures via Additive Manufacturing: From Multi-Scale Design to Versatile Functional Properties

Mechanical properties and energy absorption capabilities of functionally graded lattice structures: Experiments and simulations

3D-printed ceramic triply periodic minimal surface structures for design of functionally graded bone implants

Polymeric cellular structures based on triply periodic minimal surfaces (TPMS) have been widely studied for applications in multiple disciplines due to their multifunctionality. However, there is l...

Acoustic absorptions of multifunctional polymeric cellular structures based on triply periodic minimal surfaces fabricated by stereolithography

Inspired by natural porous architectures, numerous attempts have been made to generate porous structures. Owing to the smooth surfaces, highly interconnected porous architectures, and mathematical controllable geometry features, triply periodic minimal surface (TPMS) is emerging as an outstanding solution to constructing porous structures in recent years. However, many advantages of TPMS are not fully utilized in current research. Critical problems of the process from design, manufacturing to applications need further systematic and integrated discussions. In this work, a comprehensive overview of TPMS porous structures is provided. In order to generate the digital models of TPMS, the geometry design algorithms and performance control strategies are introduced according to diverse requirements. Based on that, precise additive manufacturing methods are summarized for fabricating physical TPMS products. Furthermore, actual multidisciplinary applications are presented to clarify the advantages and further potential of TPMS porous structures. Eventually, the existing problems and further research outlooks are discussed.

Triply periodic minimal surface (TPMS) porous structures: from multi-scale design, precise additive manufacturing to multidisciplinary applications

Investigation of functionally graded TPMS structures fabricated by additive manufacturing

Effect of the particle size on the performance of BaTiO3 piezoelectric ceramics produced by additive manufacturing

Electrically assisted water splitting is an endurable strategy for hydrogen production, but the sluggish kinetics of oxygen evolution reaction (OER) extremely restrict the large‐scale production of hydrogen. Developing highly efficient and non‐precious catalytic materials is essential to accelerate the sluggish kinetics of OER. However, currently used catalyst supports, such as copper foam, suffer from inferior corrosion resistance and structural stability, resulting in the disabled functionality of 3D conductive networks. To this end, a novel 3D freestanding electrode with corrosion‐resistant and robust Ti–6Al–4V titanium alloy lattice as the catalyst support is designed via a 3D printing technology of selective laser melting. After the coating of core–shell Cu(OH)2@CoNi carbonate hydroxides (CoNiCH) on the designed lattice, a unique micro/nano‐sized hierarchical porous structure is formed, which endows the electrocatalyst with a promising electrocatalytic activity (a low overpotential of 355 mV at 30 mA cm−2 and Tafel slope of 125.3 mV dec−1). Computational results indicate that the CoNiCH exhibits optimized electron transfer and the catalytic activity of the Ni site is higher than that of the Co site in the CoNiCH. Therefore, the integration of robust catalyst supports and highly active materials opens up an avenue for reliable and high‐performance OER electrocatalysts.

3D Printing of Multiscale Ti64‐Based Lattice Electrocatalysts for Robust Oxygen Evolution Reaction

3D printing of electrically conductive and degradable hydrogel for epidermal strain sensor

Strong and tough ceramic materials are required for many structural applications. However, these properties tend to be mutually exclusive in many man-made materials. Inspired by composition of biological materials such as nacre, this work offers a simple and versatile approach based on the concept of layered ceramics to overcome such limitations, obtaining both high strength and toughness. The resulting layered ceramic/carbon fiber reinforced polymer composites exhibit an excellent combination of high strength (611.4 ± 46.7 MPa), fracture toughness (14.87 ± 0.83 MPa m1/2) and work of fracture (6597.2 ± 99.3 J/m2). Such fracture-resistant behavior can be attributed to toughening mechanisms of crack deflection, lamellae and fiber ‘pull-out’, polymer inelastic deformation, and interfacial debonding. This strategy enables the fabrication of layered ceramic/polymer composites with remarkable properties, thus demonstrating its potential applicability to fabricating other layered composites.

Shixiang Yu

Papers

Investigation of functionally graded TPMS structures fabricated by additive manufacturing

Effect of the particle size on the performance of BaTiO3 piezoelectric ceramics produced by additive manufacturing

3D Printing of Multiscale Ti64‐Based Lattice Electrocatalysts for Robust Oxygen Evolution Reaction

3D printing of electrically conductive and degradable hydrogel for epidermal strain sensor

3D printing of layered ceramic/carbon fiber composite with improved toughness