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Publisher DOI: 10.1016/j.compscitech.2013.11.006
Title: Novel, highly-filled ceramic–polymer composites synthesized by a spouted bed spray granulation process
Language: English
Authors: Wolff, Michael F. H. 
Salikov, Vitalij 
Antonyuk, Sergiy 
Heinrich, Stefan 
Schneider, Gerold A. 
Keywords: spouted bed;granulation;composite;filling degree;B. mechanical properties
Issue Date: 20-Nov-2013
Publisher: Elsevier
Source: Composites Science and Technology (90): 154-159 (2014)
Journal or Series Name: Composites Science and Technology 
Abstract (english): We present a novel processing route to synthesize homogeneous ceramic polymer composites with ultrahigh (~78 vol.%) packing density by using the spouted bed granulation technology and subsequent warm pressing. In the granulation process, two ceramic particle size fractions (alpha-Al2O3) and a thermoplastic polymer (polyvinyl butyral) are assembled to granules. In the process, lm-sized particles are coated with a layer of polymer which contains a second, nm-sized ceramic particles fraction. The mass fractions of each constituents can be adjusted independently. During the warm pressing, the nm-sized particle fraction along with polymer is pressed into the void volume of the lm-sized particles, thus achieving a homogeneous, isotropic composite structure with a very high packing density of ceramic particles. The material, which can easily be produced in large quantities, combines a high modulus of elasticity (up to 69 GPa), tensile strength (~50 MPa), and pronounced fracture strain (~0.1%) with an isotropic, biocompatible, metal-free composition. Possible failure mechanisms are discussed, including failure due to necking of the polymer, and failure due to limited polymer–particle-interfacial strength.
DOI: 10.15480/882.1675
ISSN: 02663538
Institute: Keramische Hochleistungswerkstoffe M-9 
Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Type: (wissenschaftlicher) Artikel
Project: SFB 986, Teilproject A6 - Herstellung und Charakterisierung hierarchischer, multi-funktionaler Keramik/Metall-Polymer Materialsysteme 
SFB 986: Teilprojekt A3 - Herstellung höherer hierarchischer Ebenen von Materialsystemen mit der Wirbelschicht-granulation und Diskrete-Elemente-Modellierung der Materialien 
License: In Copyright In Copyright
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