Please use this identifier to cite or link to this item: doi:10.22028/D291-32176
Title: Effect of Pretreatment on Interface Stability and Morphology of Ni/Al Hybrid Foams by in situ Microcantilever Fracture Experiment
Author(s): Luksch, Jutta
Jung, Anne
Pauly, Christoph
Motz, Christian
Mücklich, Frank
Schäfer, Florian
Language: English
Title: Procedia Structural Integrity
Pages: 206-213
Publisher/Platform: Elsevier
Year of Publication: 2019
Title of the Conference: ICSI 2019 The 3rd International Conference on Structural Integrity
Free key words: interface stability
hybrid foam
microbeam bending
FIB tomography
DDC notations: 500 Science
530 Physics
540 Chemistry
620 Engineering and machine engineering
621.3 Electrical engineering, electronics
Publikation type: Conference Paper
Abstract: Ni/Al hybrid foams are a new class of innovative cellular composite materials consisting of open-cell aluminium (Al) foams electrochemically coated with nanocrystalline nickel (Ni). They may be used for lightweight construction elements or as crash energy absorbers. The Ni coating strengthens the Al foam achieving an up to ten times higher energy absorption capacities compared to the Al basis foam. Cellular materials such as foams provide a strong structure-property relationship as the macroscopic material properties strongly depend on the strut geometry and the material properties of the individual struts. The interface stability between the coating and the substrate foam is the dominant contribution in the strengthening mechanism of Ni/Al hybrid foams. Hence, micromechanical characterization is an important task for the design of components made of Ni/Al hybrid foams. A strong interface corresponds to a shear-stiff connection between substrate foam and coating, whereas a soft interface allows sliding between the two phases and hence reduces the buckling stiffness of individual foam struts resulting in lower strength and energy absorption capacity of the macroscopic foam. An increased critical energy release rate for interface cracking was revealed by in situ microcantilever bending tests prepared by focused ion beam (FIB) during bending tests in the scanning electron microscope (SEM) after the chemical pretreatment of the base foam.
DOI of the first publication: 10.1016/j.prostr.2019.08.028
Link to this record: urn:nbn:de:bsz:291--ds-321760
Date of registration: 15-Sep-2020
Notes: Procedia Structural Integrity, 17 (2019), S. 206-213
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Christian Motz
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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