| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VI
|
| Presentation Title |
C-5: Micro- and Nano-scale Surface Feature Growth Mechanisms During Single-spot Laser-processing of Copper |
| Author(s) |
Suchit Sarin, Graham Kaufman, Craig A. Zuhlke, Jeffrey Shield |
| On-Site Speaker (Planned) |
Suchit Sarin |
| Abstract Scope |
Laser surface processing is gaining attention as a method to functionalize surface properties without coatings. Understanding the surface structure formation is necessary to optimally tailor surface features for maximum performance. Surface-processed Cu, in particular, has shown enhanced heat transfer behavior. Here, we study the surface structures and subsurface microstructures of single-spot ablated Cu to understand the formation mechanisms, which combine ablation and re-deposition of material. Cu is processed with varying numbers of picosecond laser pulses from 340 to 1140 with a peak fluence of 2.95 J/cm2. Six distinct surface feature morphologies were observed. Cross-sectional examination revealed feathery structures with a large surface area on some zones. These polycrystalline structures were determined to be largely copper oxides, and were formed by the sintering of deposited particles from the center of the ablated region due to the lower fluence of the Gaussian pulses bombarded onto the sample at the periphery. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Copper / Nickel / Cobalt, Surface Modification and Coatings |