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Adapting the co-sintering behavior of metal-ceramic composites

  • : Tim Slawik1, Anne Bergner1, Uwe Scheithauer1, Roland Scholl1, Eric Schwarzer1, Tassilo Moritz1
  • : 1Fraunhofer IKTS
  • : PDF Download
  • : 2015

Abstract

The combination of metal and ceramic layers can be useful in many different application fields as solid oxide fuel cells, filter elements, in medical engineering or for wear-resistant components.
The most promising, cost-effective and especially the way with the highest degree of freedom in regard to the design is using a combined shaping (co-shaping) and sintering (co-sintering). However, differences in densification behavior during co-sintering can lead to stresses and defects as cracks, delaminations or cambering of the composite.

The presentation will show the adaption of the co-sintering behavior of ceramic and metallic materials using a high energy milling (HEM) step to influence the sintering behavior of the metallic powders. The change of the sintering behavior can be related with a change in particle size, specific surface area and crystallite size.
Co-sintering results of composites produced by different shaping technologies consisting of yttria stabilized zirconia and an iron chromium alloy using the starting powder in comparison to the powder modified by HEM are shown.

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