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Journal of Materials Science

, Volume 46, Issue 15, pp 5237–5244 | Cite as

Preparation and characterisation of ceramic-faced metal–ceramic interpenetrating composites for impact applications

  • Hong ChangEmail author
  • Jon Binner
  • Rebecca Higginson
  • Paul Myers
  • Peter Webb
  • Gus King
Article

Abstract

This article accesses the impact performance of ceramic-faced, metal–ceramic interpenetrating composites (IPCs) produced in situ from infiltrating ceramic foams with a molten aluminium–magnesium alloy. The approach had two variations, viz., the production of a metal bond between a ceramic front face and backing IPC and the creation of a ceramic bond. The impact performance of metal-bonded IPCs was evaluated using both split Hopkinson’s pressure bar (SHPB) and depth of penetration (DoP) techniques. With a 4-mm thick Al2O3 front face and an 8-mm thick IPC backing, the DoP was zero. In one case, a sample survived fundamentally intact with only spall damage to the dense Al2O3 front face. The resulting damage was thoroughly assessed using a range of techniques, including polarized light microscopy, scanning electron microscopy (SEM), 3D MicroCT and transmission electron microscopy (TEM). The metal phase deformed as a result of the formation of large numbers of dislocations, whilst the ceramic phase accommodated the deformation via localised cracking. Metal bridges across the cracks formed, increasing the damage tolerance of the IPCs. The metal bond between the ceramic front face and the IPC was also observed to withstand the impact of the armour piercing rounds without any sign of debonding occurring.

Keywords

Foam Front Face Interfacial Debonding Ceramic Foam Ceramic Preform 

Notes

Acknowledgements

The authors gratefully acknowledge funding from the EPSRC in the UK; Dyson Thermal Technologies, Sheffield, UK, for supplying the alumina foams and Permali (Gloucester) Limited, Gloucester, UK for the ballistic testing.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Hong Chang
    • 1
    • 4
    Email author
  • Jon Binner
    • 1
  • Rebecca Higginson
    • 1
  • Paul Myers
    • 2
  • Peter Webb
    • 3
  • Gus King
    • 3
  1. 1.Department of MaterialsLoughborough UniversityLeicestershireUK
  2. 2.Dyson Thermal TechnologiesSheffieldUK
  3. 3.Permali (Gloucester) LtdGloucesterUK
  4. 4.College of Engineering, Mathematics and Physical SciencesUniversity of ExeterExeterUK

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