title: A novel method for a multi-level hierarchical composite with brick-and-mortar structure.
abstract: The fascination for hierarchically structured hard tissues such as enamel or nacre arises from their unique structure-properties-relationship. During the last decades this numerously motivated the synthesis of composites, mimicking the brick-and-mortar structure of nacre. However, there is still a lack in synthetic engineering materials displaying a true hierarchical structure. Here, we present a novel multi-step processing route for anisotropic 2-level hierarchical composites by combining different coating techniques on different length scales. It comprises polymer-encapsulated ceramic particles as building blocks for the first level, followed by spouted bed spray granulation for a second level, and finally directional hot pressing to anisotropically consolidate the composite. The microstructure achieved reveals a brick-and-mortar hierarchical structure with distinct, however not yet optimized mechanical properties on each level. It opens up a completely new processing route for the synthesis of multi-level hierarchically structured composites, giving prospects to multi-functional structure-properties relationships.
authors.affiliation: Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, 21073 Hamburg, Germany.
authors.forename: Kristina
authors.initials: K
authors.lastname: Brandt
authors.forename: Michael F H
authors.initials: MF
authors.lastname: Wolff
authors.forename: Vitalij
authors.initials: V
authors.lastname: Salikov
authors.forename: Stefan
authors.initials: S
authors.lastname: Heinrich
authors.forename: Gerold A
authors.initials: GA
authors.lastname: Schneider
mesh_terms: D040761:Biomimetic Materials / Q000138:chemical synthesis*; D003252:Construction Materials / Q000032:analysis*; D008422:Materials Testing; D008968:Molecular Conformation; D060734:Nacre / Q000737:chemistry*
chemical_list: D060734:Nacre
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