Ni/Al-Hybrid Cellular Foams: An Interface Study by Combination of 3D-Phase Morphology Imaging, Microbeam Fracture Mechanics and In Situ Synchrotron Stress Analysis

Nickel(Ni)/aluminium(Al) hybrid foams are Al base foams coated with Ni by electrodeposition. Hybrid foams offer an enhanced energy absorption capacity. To ensure a good adhering Ni coating, necessary for a shear resistant interface, the influence of a chemical pre-treatment of the base foam was inve...

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Bibliographic Details
Published in:Materials 2021-06, Vol.14 (13), p.3473
Main Authors: Luksch, Jutta, Jung, Anne, Pauly, Christoph, Derr, Ralf, Gruenewald, Patrick, Laub, Marc, Klaus, Manuela, Genzel, Christoph, Motz, Christian, Mücklich, Frank, Schaefer, Florian
Format: Article
Language:English
Subjects:
Aluminum
Bending stresses
Coated electrodes
Electrolytes
Energy
Energy absorption
Experiments
Field tests
Foams
Fracture mechanics
Fracture testing
Interfaces
Ion beams
Mechanical properties
Mechanical tests
Microbeams
Morphology
Nickel coatings
Shear strength
Stress analysis
Synchrotrons
Tomography
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Summary:Nickel(Ni)/aluminium(Al) hybrid foams are Al base foams coated with Ni by electrodeposition. Hybrid foams offer an enhanced energy absorption capacity. To ensure a good adhering Ni coating, necessary for a shear resistant interface, the influence of a chemical pre-treatment of the base foam was investigated by a combination of an interface morphology analysis by focused ion beam (FIB) tomography and in situ mechanical testing. The critical energy for interfacial decohesion from these microbending fracture tests in the scanning electron microscope (SEM) were contrasted to and the results validated by depth-resolved measurements of the evolving stresses in the Ni coating during three-point bending tests at the energy-dispersive diffraction (EDDI) beamline at the synchrotron BESSY II. Such a multi-method assessment of the interface decohesion resistance with respect to the interface morphology provides a reliable investigation strategy for further improvement of the interface morphology.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14133473