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3D Printing of Porous Al2O3 and SiC ceramics
C. Polzin1, D. Günther2, H. Seitz1
1 Fluid Technology and Microfluids, University of Rostock, Justus-von-Liebig-Weg 6, D-18059 Rostock, Germany
2 Paul-Lenz-Straße 1a, D-86316 Friedberg, Germany
received March 27, 2015, received in revised form May 5, 2015, accepted May 12, 2015
Vol. 6, No. 2, Pages 141-146 DOI: 10.4416/JCST2015-00013
Abstract
We demonstrated the possibility to fabricate porous ceramics made of alumina and silicon carbide by means of 3D printing. For this investigation, two ceramic powder blends, VX-AlOx-Typ A and VX-SiC-Typ A, were used. Several specimens were printed, sintered and characterized. The specimens possess high porosity of up to 69 % for alumina and 55 % for silicon carbide. The compressive strength amounted to 6.8 MPa for the VX-AlOx-Typ A and to 19.65 MPa for the VX-SiC-Typ A specimens. The flexural strength amounts to 4.17 MPa and 9.74 MPa for the alumina and silicon carbide parts respectively. The thermal expansion coefficient for parts made of VX-AlOx-Typ A is 1.03x10-6 K-1 and for parts made of VX-SiC-Typ A it is 6.87x10-6 K-1.
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Keywords
Porous ceramic, alumina, silicon carbide, 3D printing, additive manufacturing.
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