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Poster

WEB Thermodynamics and kinetics of phase formation in magnetron-sputtered Ni/Al multilayer thin films with nanoscale morphology

Thursday (27.02.2020)
10:08 - 10:08 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*Laser-based (“2D”) surface treatment of lithium-ion battery electrodes to improve the rate capability 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


Aluminide thin film multilayer systems are materials far from equilibrium that are highly reactive enabling self-propagating high-temperature syntheses (SHS) [1] where a high amount of heat is released. Using magnetron sputter-deposition many hundreds of individual nanometer thick layers can be stacked by alternating pure Al with one or more other metals that are highly miscible in Al, e.g., Ni, Ru, Fe, Pd, Pt, or Ag [1-3]. The reaction mechanism toward equilibrium is controlled by a pronounced atomic diffusion asymmetry across the layer interfaces and it is characterized by large negative heat of formation. For example, in the case of the formation of the intermetallic NiAl and RuAl B2-structured phases the specific heat of formation is -59 and -62 kJ mol-1, respectively. This large amount of heat released during the solid state reaction is able to melt solder layers and thus considered relevant as micron-sized heat source or energy carriers for reactive joining in microelectromechanical systems.

The reaction itself is not only determined by the choice of reactant metals and the relative stoichiometry - thus by the thermodynamics of the system, but also by the type of imprinted morphology, as well as post-processing factors such as thermal and stress history, nature of the substrate, and ignition method. Here we will present thermodynamic and kinetic data associated to the reaction in Ni/Al sputtered multilayer thin films by differential scanning calorimetry (DSC) as a function of several of the abovementioned factors. For this reason, DSC will be employed for slow heating rates and Flash DSC for heating rates from 10^4 to 10^6 K s-1 similar to the heating rates observed in SHS reactions occurring in a semi-solid liquid state. We will discuss the effects of the layer periodicity, overall composition, sputtering conditions, and thermal post-processing treatments to the reaction mechanisms. Furthermore, we will compare the results with those obtained by annealing Al/Ni alternate foils after repeated cold rolling [3] and Ni-Al nanopowders after high pressure torsion [4].

Speaker:
Sascha Sebastian Riegler
Saarland University
Additional Authors:
  • Dr. Isabella Gallino
    Saarland University
  • Dr. Michael Stüber
    Karlsruhe Institute for Technology
  • Dr. Julia Ivanisenko
    Karlsruhe Institute for Technology
  • Dr. Heike Bartsch
    TU Ilmenau
  • Prof. Dr. Peter Schaaf
    TU Ilmenau
  • Prof. Dr. Ralf Busch
    Saarland University

Dateien

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