Additive Manufacturing of Copper Alloys and Components

Additive manufacturing of copper alloys and components encompasses a suite of layer-by-layer fabrication techniques that enable the production of intricately shaped parts with tailored thermal, electrical and mechanical properties. Copper’s intrinsic high thermal and electrical conductivities, combined with its reflectivity and high thermal diffusivity, present both unique opportunities and formidable challenges for processes such as laser powder bed fusion and powder-based deposition. Strategies to overcome poor laser absorption include the development of novel powder surface treatments, the use of shorter-wavelength lasers and the incorporation of light-absorbing nanoparticles. Alloy design has likewise evolved through the introduction of minor alloying elements and the engineering of precipitate phases to achieve a balance between strength and conductivity. Concurrent advances in defect-prediction models have improved control over porosity and balling phenomena, while lattice architecture design has expanded functional performance under dynamic loading. Taken together, these developments are driving the wider adoption of copper additive manufacturing in sectors ranging from power electronics and heat exchange to aerospace and customised medical tooling.

Research from Nature Portfolio

Recent studies have demonstrated a laser powder bed fusion route to high-strength, high-conductivity copper by dispersing a small fraction of lanthanum hexaboride nanoparticles within the copper matrix. The nanoparticles enhance laser absorptivity and act as stable dispersoids, yielding parts with markedly improved tensile strength and thermal stability without compromising electrical conductivity at both ambient and elevated temperatures. This dual-property enhancement opens avenues for copper components in demanding thermal-management and high-power electronic applications.

Additive Manufacturing of Copper Alloys and Components publication trend

The graph below shows the total number of articles in additive manufacturing of copper alloys and components across all publications each year (not limited to Nature Index journals).

Technical terms

Additive manufacturing: A group of processes that fabricate parts by successive layering of material based on digital models.

Laser powder bed fusion (L-PBF): An additive manufacturing process in which a laser selectively fuses powder particles in a powder bed, building parts layer by layer.

Absorptivity: The fraction of incident laser energy absorbed by a material, critical for efficient melting in laser-based processes.

Balling: A defect characterised by the formation of discrete, spherical droplets instead of a continuous melt track, leading to porosity and poor mechanical properties.

Lattice structures: Periodic, three-dimensional architectures designed within a part to achieve high strength-to-weight ratios and energy-absorption capabilities.

Nanoparticles: Particles with dimensions on the order of 1–100 nanometres, used to modify powder behaviour or impart functional properties within a metal matrix.

References

1. Manufacturing of high strength and high conductivity copper with laser powder bed fusion. Nature Communications (2024).
2. High absorptivity nanotextured powders for additive manufacturing. Science Advances (2024).
3. A simple scaling model for balling defect formation during laser powder bed fusion. Additive Manufacturing (2023).
4. Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices. Materials & Design (2023).