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Poster

WEB Femtosecond laser approach to cut Ni/Al reactive foils without ignition of a self-propagation reaction

Thursday (27.02.2020)
12:13 - 12:13 Poster Room
Part of:
Line-Up:
- Poster *web*Smoothing of additive manufactured parts using ns-pulsed laser source 1 Dipl.-Ing. Florian Kuisat
- Poster TBA -
- Poster *web*Combustion Synthesis of High Entropy Alloys thin films 1 Dr. Anni Wang
- Poster *web*Surface macro-smoothing and micro-structuring of additive manufactured components by using DLIP technique for controlling wetting characteristics 1 Dipl.-Ing. Florian Kuisat
- Poster *web*Influence of embedding materials on heat transfer and ignition transfer time in heterogeneous reactive material system 1 Mostafa Baloochi
- Poster TBA -
- Poster *web*Self reactive joining process with multilayer foils in lap joint configuration 1 Marcus Glaser
- Poster *web*Thermodynamics and kinetics of phase formation in magnetron-sputtered Ni/Al multilayer thin films with nanoscale morphology 1 Sascha Sebastian Riegler
- Poster *web*Femtosecond laser approach to cut Ni/Al reactive foils without ignition of a self-propagation reaction 1 Maria Amelia Martins
- Poster *web*Effect of preparation angle on atom probe tomography of reactive multilayers 1 Christian Schäfer
- Poster *web*Reactive Ni/Al multilayers with 3D Morphologies 1 Konrad Jaekel
- Poster *web*Synchrotron radiation X-ray powder diffraction and magnetometric study of natural and synthetic terms of the stannite-kesterite pseudobinary system in the low temperature regime (5-275 K) 1 Dr. Francesco Di Benedetto
- Poster *web*Coating and Drying of Sodium-Ion-Battery Electrodes 1 Julian Klemens
- Poster *web*Analytical prediction model for Direct Laser Interference Patterning 1 Dr. Bogdan Voisiat
- Poster *web*CFD Analysis of joining processes using reactive multilayers on native surface morphologies of microelectronic substrates 1 Erik Wiss
- Poster *web*Top-Hat profile in Direct Laser Interference Patterning: Is it worth it? 1 Mikhael El-Khoury
- Poster *web*Tailoring the microstructure of electrodes for lithium-ion batteries to improve energy and power density 1 Jens Sandherr
- Poster *web*Microstructure investigation of superconducting NbN thin films on copper 1 Dipl.-Ing. Ying Li
- Poster TBA -
- Poster *web*Laser functionalized PEEK-based coating systems to minimize friction and wear 1 Dr. Tim Kunze
- Poster *web*Structure and Dynamics in a Layered Na-ion Battery Cathode 1 Euan Bassey
- Poster *web*Electrode-Processing using porous nano-structured Na3V2(PO4)3 (NVP) for Sodium-Ion Batteries 1 Luca Schneider
- Poster TBA -
- Poster *web*Experimental Approach for Phase Diagram determination of Li alloys 1 Joel Fels
- Poster *web*Process Integration of Few-Layer MoS2 into a-Si:H Heterojunction pin-Photodiodes for extended Infrared Detection 1 Charles Otieno Ogolla
- Poster *web*Ti3SiC2- and Ti3AlC2-based ceramics synthesis by spark plasma sintering of preceramic paper 1 Elizaveta Sedanova
- Poster *web*Overheating microstructural study of nickel-based superalloys from turbine blades of aircraft engines 1 Dr. Ana Pastor
- Poster *web*Electrochemical thermodynamics of Lithium Batteries and their materials 1 Prof. Dr. Hans Jürgen Seifert
- Poster *web*Corrosion Analysis of a 316L Stainless Steel Gas Outlet Sealed with a Copper Ring Used in the CO2 Methanation Process 1 Ananya Prechavut
- Poster *web*Self-propagating reaction of structured reactive Al/Ni multilayers 1 Yesenia Sauni
- Poster *web*3D structured electrodes for Li-ion batteries using open porous metal foams as current collector for high energy application 1 Jonas Oehm
- Poster *web*Novel air stable single source precursor for homogeneous crystalline TiS2 thin films 1 Anja Sutorius
- Poster *web*Synthesis of nickel-copper composite with controllable nanostructure through facile solvent control as positive electrode for high-performance supercapacitors 1 Dr. Damin Lee
- Poster *web*Towards understanding response generation in conductometric gas sensors 1 Stefan Kucharski
- Poster Effects of 3D electrode design on high-energy silicon-graphite anode materials 1 Yijing Zheng

Session -F: Functional Materials, Surfaces, and Devices
Belongs to:
Topic X: Poster Session


Reactive multilayer foils (RMFs) for joining processes have attracted a great deal of attention over the last few years. The manufacturing of joints based on RMFs offers some crucial advantages for application. The extremely fast joining is conducted at room temperature with the heat source locally in the joining zone, as opposed to standard soldering. The RMFs comprise alternating nanoscale layers of two different metals that, when intermixed, form a product phase through a highly exothermic reaction. With the advent of reliable ultrashort-pulsed lasers, their wide range of properties found application in different fields of science, especially in materials science and engineering. Previous works have shown that it is possible to machine RMFs with pulsed femtosecond (fs) laser ablation with minimal risk of igniting them, due to its limited thermal dissipation into the material being machined. Additionally, fs-laser has been proposed as a cutting method for the fabrication of shaped foils for joining.

In the present work, a Ti:Sapphire femtosecond laser operating at 780 nm wavelength was used to machine commercial Ni/Al Nanofoils®. A careful optimization of the laser process parameters such as pulse-length, focus diameter and repetition rate was conducted in order to avoid the ignition of the foils during the process. Different shapes were cut out of the freestanding foil with micron-scale precision aiming at enabling form-locking joining for improving joint strength and reliability and guiding the reaction front. Moreover, a systematic characterization of the microstructure modification by laser treatment was conducted by using electron and optical microscopy. These characterizations are important to understand what happens to the microstructure close to the cut edge and the material removing mechanisms.

Speaker:
Maria Amelia Martins
Saarland University
Additional Authors:
  • Dr. Christoph Pauly
    Saarland University
  • Prof. Dr. Jean Pierre Bergmann
    Technische Universität Ilmenau
  • Prof. Dr. Frank Mücklich
    Saarland University