Multi-material, multi-layer femtosecond laser surface processing

Alfred Tsubaki; Mark Anderson; Andrew Reicks; Jeffrey E. Shield; Dennis R. Alexander; Craig A. Zuhlke

doi:10.1117/12.2582756

10 March 2021 Multi-material, multi-layer femtosecond laser surface processing

Alfred Tsubaki, Mark Anderson, Andrew Reicks, Jeffrey E. Shield, Dennis R. Alexander, Craig A. Zuhlke

Proceedings Volume 11674, Laser-based Micro- and Nanoprocessing XV; 116740B (2021) https://doi.org/10.1117/12.2582756
Event: SPIE LASE, 2021, Online Only

Abstract

Femtosecond laser surface processing (FLSP) is a material processing technique used to produce self-organized micro/nanostructures on metals. The hierarchal structures can improve the surface properties of materials when applied to specific applications such as enhancing heat transfer. In this paper, we demonstrate a recently developed technique termed multi-material, multi-layer FLSP (3ML-FLSP). With 3ML-FLSP, micro/nanoscale features can be produced that are composed of multiple materials by processing surfaces using traditional FLSP techniques that are layered with thin foils of different materials. We demonstrate results with three layers of different metals (304 stainless steel, copper, and aluminum) clamped together during laser processing to create structures composed of all three metals. Ion beam milling is used to cross-section structures for subsurface analysis of the microstructure. The three metals did not mix within the bulk of the microstructures indicating that the microstructures were produced primarily through preferential removal of material around the structures. However, there was mixing of all three materials within the nanoparticle layer that covers the microstructures.

Conference Presentation

Citation Download Citation

Alfred Tsubaki, Mark Anderson, Andrew Reicks, Jeffrey E. Shield, Dennis R. Alexander, and Craig A. Zuhlke "Multi-material, multi-layer femtosecond laser surface processing", Proc. SPIE 11674, Laser-based Micro- and Nanoprocessing XV, 116740B (10 March 2021); https://doi.org/10.1117/12.2582756

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