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Effect of coating on fracture behaviour of ceramic foams under tensile loading
Řehořek, Lukáš ; Dlouhý, Ivo ; Chlup, Zdeněk
Cellular structures are promising type of architecture for a lot of materials whether made of metals, plastic or ceramic. Target applications are those where lightweight, damping and and/or stiff properties are required. With combination of different kinds of materials the foamed composites with favourable mechanical properties can be developed. In case of ceramic foams the main disadvantage – brittleness – can be reduced. For straight forward application of this materials all types of mechanical properties have to be known. The tensile properties of open cell ceramic foam material based on alumina coated by various materials are presented in this paper.
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Nonisometric pigments in coating for the corrosion protection of metals
Tamchynová, P. ; Kalendová, A. ; Štengl, Václav ; Kváča, Zdeněk
The paper deals with various types of nonisometric pigments and the effect therof on the protection coating materials properties. New type of lamellar pigments is the surface treated mica-muscovite, which forms the proper core or the layer carrier. At the carrier surface a layer of ferric oxide-hematite is formed. The contribution of these lamellar pigments is evaluated from the adhesion-barrier efficiency point of view or, maybe, the anticorrosion efficiency thereof in coating materials.
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