Luksch Jutta, Jung Anne, Pauly Christoph, Derr Ralf, Gruenewald Patrick, Laub Marc, Klaus Manuela, Genzel Christoph, Motz Christian, Mücklich Frank, Schaefer Florian
Materials Science and Methods, Campus D2 3, Saarland University, 66123 Saarbruecken, Germany.
Applied Mechanics, Campus A4 2, Saarland University, 66123 Saarbruecken, Germany.
Materials (Basel). 2021 Jun 22;14(13):3473. doi: 10.3390/ma14133473.
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.
镍（Ni）/铝（Al）复合泡沫材料是通过电沉积在铝基泡沫材料上涂覆镍制成的。复合泡沫材料具有增强的能量吸收能力。为了确保具有良好的抗剪切界面所需的镍涂层附着力，通过聚焦离子束（FIB）断层扫描进行界面形态分析和原位力学测试相结合的方法，研究了基体泡沫材料化学预处理的影响。在扫描电子显微镜（SEM）中，通过这些微弯曲断裂试验得到的界面脱粘临界能量，与在同步加速器BESSY II的能量色散衍射（EDDI）光束线进行三点弯曲试验时镍涂层中不断变化的应力的深度分辨测量结果进行了对比，并验证了结果。这种针对界面形态对界面抗脱粘性能的多方法评估，为进一步改善界面形态提供了可靠的研究策略。
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