TY - GEN
T1 - Bio-based silicon carbide ceramics from extruded thermoset-based wood polymer composites
AU - Fürst, Christian
AU - Plank, Bernhard
AU - Senck, Sascha
AU - Mihalic, Matthias
AU - Unterweger, Christoph
N1 - Publisher Copyright:
© CCM 2020 - 18th European Conference on Composite Materials. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - This work investigates the preparation of silicon carbide ceramics (C/Si/SiC ceramics) from extruded thermoset-based wood polymer composites (WPC). The extruded WPC green bodies are carbonised forming open porous carbon templates (C-templates). These C-templates are converted by liquid silicon infiltration into bio-based C/Si/SiC ceramics. The materials over the whole process chain (WPC → C-template → C/Si/SiC ceramic) are characterised by density and porosity measurements, mechanical testing, light optical microscopy, scanning electron microscopy and X-ray computed tomography. Extruded thermoset-based WPC can successfully be used for the production of C/Si/SiC ceramics. Different 3D geometries have been processed by profile extrusion. The main impact factor on the quality of the porous C-templates and subsequent C/Si/SiC ceramics is the distribution of the constituents as well as the density distribution in the green bodies. Variations in the composition of WPC, especially the thermoplastic content, allow adjusting the porosity of the C-templates formed after pyrolysis. From optimised WPC green bodies, C-templates without distortion (isotropic shrinkage) and homogeneous pore distribution and subsequent C/Si/SiC ceramics with SiC contents up to 90 vol% (95 wt%) could be produced.
AB - This work investigates the preparation of silicon carbide ceramics (C/Si/SiC ceramics) from extruded thermoset-based wood polymer composites (WPC). The extruded WPC green bodies are carbonised forming open porous carbon templates (C-templates). These C-templates are converted by liquid silicon infiltration into bio-based C/Si/SiC ceramics. The materials over the whole process chain (WPC → C-template → C/Si/SiC ceramic) are characterised by density and porosity measurements, mechanical testing, light optical microscopy, scanning electron microscopy and X-ray computed tomography. Extruded thermoset-based WPC can successfully be used for the production of C/Si/SiC ceramics. Different 3D geometries have been processed by profile extrusion. The main impact factor on the quality of the porous C-templates and subsequent C/Si/SiC ceramics is the distribution of the constituents as well as the density distribution in the green bodies. Variations in the composition of WPC, especially the thermoplastic content, allow adjusting the porosity of the C-templates formed after pyrolysis. From optimised WPC green bodies, C-templates without distortion (isotropic shrinkage) and homogeneous pore distribution and subsequent C/Si/SiC ceramics with SiC contents up to 90 vol% (95 wt%) could be produced.
KW - Bio-based
KW - Ceramics
KW - Extrusion
KW - Silicon carbide
KW - Wood polymer composite
UR - http://www.scopus.com/inward/record.url?scp=85084162303&partnerID=8YFLogxK
M3 - Conference contribution
T3 - ECCM 2018 - 18th European Conference on Composite Materials
BT - ECCM 2018 - 18th European Conference on Composite Materials
PB - Applied Mechanics Laboratory
T2 - 18th European Conference on Composite Materials, ECCM 2018
Y2 - 24 June 2018 through 28 June 2018
ER -