Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper
Modification of surfaces with ultrashort pulse laser surface processing techniques has shown to enhance surface properties for numerous applications. To more effectively tailor material properties, there needs to be a better understanding of the self-organization processes that lead to the quasi-per...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Materials Today Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590049823000723 |
| _version_ | 1797727665278418944 |
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| author | Mark Anderson Graham Kaufman Aaron Ediger Dennis Alexander Craig Zuhlke Jeffrey E. Shield |
| author_facet | Mark Anderson Graham Kaufman Aaron Ediger Dennis Alexander Craig Zuhlke Jeffrey E. Shield |
| author_sort | Mark Anderson |
| collection | DOAJ |
| description | Modification of surfaces with ultrashort pulse laser surface processing techniques has shown to enhance surface properties for numerous applications. To more effectively tailor material properties, there needs to be a better understanding of the self-organization processes that lead to the quasi-periodic micro- and nano-scale surface features. In this paper, a multi-cross-section technique was used to gain understanding of how the surface features form during processing of copper with picosecond pulses. Incremental cross-sections were performed starting at the leading edge of the final laser pass. Each subsequent cross-section moved farther away from the leading edge and towards the final microstructure seen within the center of the processed region. Utilizing the cross-sectional and laser confocal data combined with the 2D projection of the Gaussian beam profile, a progression of formation mechanisms that includes a balance of ablation, redeposition, shielding, and sintering is explained. This formation mechanism progressed with initial ablation of copper that redeposits onto the surface. The redeposited copper then acts as a protection against the high fluence portion of the laser beam allowing for the mounds to grow. The redeposited copper particles are then sintered by the tail-end of the Gaussian profile into a porous layer. |
| first_indexed | 2024-03-12T11:02:50Z |
| format | Article |
| id | doaj.art-bd99a37f5aae4f23b3250f4a5786bd71 |
| institution | Directory Open Access Journal |
| issn | 2590-0498 |
| language | English |
| last_indexed | 2024-03-12T11:02:50Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials Today Advances |
| spelling | doaj.art-bd99a37f5aae4f23b3250f4a5786bd712023-09-02T04:32:23ZengElsevierMaterials Today Advances2590-04982023-08-0119100412Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copperMark Anderson0Graham Kaufman1Aaron Ediger2Dennis Alexander3Craig Zuhlke4Jeffrey E. Shield5Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USA; Corresponding author.Department of Electrical & Computer Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USADepartment of Electrical & Computer Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USADepartment of Electrical & Computer Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USADepartment of Electrical & Computer Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USADepartment of Mechanical & Materials Engineering, University of Nebraska-Lincoln, 900 N. 16th St., Lincoln, NE, 68588, USAModification of surfaces with ultrashort pulse laser surface processing techniques has shown to enhance surface properties for numerous applications. To more effectively tailor material properties, there needs to be a better understanding of the self-organization processes that lead to the quasi-periodic micro- and nano-scale surface features. In this paper, a multi-cross-section technique was used to gain understanding of how the surface features form during processing of copper with picosecond pulses. Incremental cross-sections were performed starting at the leading edge of the final laser pass. Each subsequent cross-section moved farther away from the leading edge and towards the final microstructure seen within the center of the processed region. Utilizing the cross-sectional and laser confocal data combined with the 2D projection of the Gaussian beam profile, a progression of formation mechanisms that includes a balance of ablation, redeposition, shielding, and sintering is explained. This formation mechanism progressed with initial ablation of copper that redeposits onto the surface. The redeposited copper then acts as a protection against the high fluence portion of the laser beam allowing for the mounds to grow. The redeposited copper particles are then sintered by the tail-end of the Gaussian profile into a porous layer.http://www.sciencedirect.com/science/article/pii/S2590049823000723AblationSelf-organized structuresLaser-matter interactionsFormation mechanismCross-sectional analysisCopper substrate |
| spellingShingle | Mark Anderson Graham Kaufman Aaron Ediger Dennis Alexander Craig Zuhlke Jeffrey E. Shield Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper Materials Today Advances Ablation Self-organized structures Laser-matter interactions Formation mechanism Cross-sectional analysis Copper substrate |
| title | Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper |
| title_full | Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper |
| title_fullStr | Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper |
| title_full_unstemmed | Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper |
| title_short | Formation mechanism of micro/nanoscale structures on picosecond laser pulse processed copper |
| title_sort | formation mechanism of micro nanoscale structures on picosecond laser pulse processed copper |
| topic | Ablation Self-organized structures Laser-matter interactions Formation mechanism Cross-sectional analysis Copper substrate |
| url | http://www.sciencedirect.com/science/article/pii/S2590049823000723 |
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