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Novel, highly-filled ceramic–polymer composites synthesized by a spouted bed spray granulation process
Citation Link: https://doi.org/10.15480/882.1675
Publikationstyp
Journal Article
Date Issued
2014-01-10
Sprache
English
TORE-DOI
Volume
90
Start Page
154
End Page
159
Citation
Composites Science and Technology (90): 154-159 (2014-01-14)
Publisher DOI
Scopus ID
Publisher
Elsevier
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.
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.
Subjects
spouted bed
granulation
composite
filling degree
B. mechanical properties
DDC Class
620: Ingenieurwissenschaften
Funding(s)
Publication version
publishedVersion
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