Long-term immersion exposure of perlite–aluminium syntactic foam in seawater

Our corrosion study has been published in the Journal of Composite Materials.

Abstract Perlite–metal syntactic foam is a novel lightweight material with good specific strength and excellent energy absorption capabilities. To analyse its suitability in marine applications, perlite–metal syntactic foam has been immersed for 2 years in natural flowing seawater. The change of mass and mechanical properties has been studied as a function of exposure time. Results indicate a slow degradation of mechanical properties that can be attributed to a change of the macroscopic deformation mechanism. Interestingly, no evidence of significant corrosion was observed. Instead, the change in mech- anical properties is triggered by the sedimentation of oxides and sulphates within the expanded perlite particles. Implications towards the long-term viability of such perlite–metal syntactic foam in marine applications are discussed.

Special Issue “Cellular Metals: Fabrication, Properties and Applications”

I am honored to have been invited to join an excellent team of guest editors for a Special Issue in Metals. The other guest editors are Prof. Dr. Isabel Duarte, Prof. Dr. Matej Vesenjak, and Prof. Dr.-Ing. Lovre Krstulović-Opara.

For more information please refer to this website or contact me directly.

This Special Issue is focused on:

  • recent advances in novel manufacturing methods of cellular metals,
  • design of new or improved performances of the cellular structures,
  • geometrical characterization and determination of physical properties,
  • experimental testing, numerical simulations and optimization methods,
  • applications.

Quasi static and dynamic compression of zinc syntactic foams

Our paper has been published in the Journal of Alloys and Compounds. The paper can be downloaded for free before September 21, 2018.

Abstract In this study, two novel zinc syntactic foams are tested in dynamic and quasi-static compression. Expanded perlite (EP) and expanded glass (EG) particles are combined with the ZA27 zinc alloy using counter-gravity infiltration casting. The average densities of the resulting EG-ZA27 and EP-ZA27 syntactic foams are 1.84 g/cm3 and 2.05 g/cm3, respectively. The as-cast foam samples are compressed under quasi-static (0.1 mm/s) and dynamic (284 mm/s) loading conditions. Optical and infrared imaging are used for a detailed investigation of their deformation behaviour. The increasing brittleness of the ZA27 alloy at high strain rates is found to alter the syntactic foam properties at dynamic loading.