From infrared to ultraviolet: direct laser interference patterning of additively manufactured titanium alloy using a picosecond laser

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

  • Frederic Schell - , Fraunhofer Institute for Material and Beam Technology (Author)
  • Avinash Hariharan - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Phil Goldberg - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Sabri Alamri - , Fraunhofer Institute for Material and Beam Technology, Fusion Bionic GmbH (Author)
  • Annett Gebert - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Tim Kunze - , Fusion Bionic GmbH (Author)
  • Andres Fabian Lasagni - , Chair of Laser-based Manufacturing, Fraunhofer Institute for Material and Beam Technology (Author)

Abstract

Medical implants, such as dental screws or hip stems, are made of biocompatible materials so that they can be well integrated into living organisms. For instance, titanium and its alloys offer high biocompatibility and osseointegration, making these materials very common in such applications. Furthermore, the new advancements in additive manufacturing allow to customize the fabrication of implants which are tailored to the patients' individual needs. Furthermore, it is known that the structural elements with feature sizes in the micrometer range on the implants' surface play a significant role in the attachment and proliferation of cells. These elements can be fabricated through laser-based texturing methods that offer high flexibility and high throughput. In this work, we explore the potential of fabricating surface microstructures on additive manufactured near-beta titanium alloy parts (Ti-13Nb-13Zr), using the Direct Laser Interference Patterning (DLIP) technique. Hereby, a single laser beam is split into two sub-beams that are subsequently recombined on the substrate surface where they form a line-like interference pattern with a defined spatial period. We combine DLIP with a picosecond-pulsed laser source and investigate the morphologies and surface features that can be created. Thereby, different laser wavelengths were employed, including 355 nm, 532 nm and 1064 nm. The resulting surface textures are analyzed using scanning electron microscopy (SEM) and confocal microscopy (CM), showing different types of laserinduced periodic surface structures (LIPSS), of which the geometry and size depended on the used process parameters.

Details

Original languageEnglish
Title of host publicationLaser-based Micro- and Nanoprocessing XVI
EditorsAkira Watanabe, Rainer Kling
PublisherSPIE - The international society for optics and photonics
Number of pages9
ISBN (electronic)9781510648494
Publication statusPublished - 2022
Peer-reviewedYes

Publication series

SeriesProceedings of Spie
Volume11989
ISSN0277-786X

Conference

TitleConference on Laser-Based Micro- and Nanoprocessing XVI
Conference number16
Descriptionphysical event: 22–27 January 2022
online event: 20–24 February 2022
Duration22 January - 27 February 2022
LocationMoscone Center
CitySan Francisco
CountryUnited States of America

External IDs

Scopus 85131226826
ORCID /0000-0003-4333-4636/work/196675468

Keywords

Keywords

  • Direct laser interference patterning, Hierarchical structure, Microstructure, Near-beta titanium, Picosecond, microstructure, hierarchical structure, direct laser interference patterning, near-beta titanium, picosecond