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3D Printing of Porous Al₂O₃ and SiC ceramics

C. Polzin, D. Günther, H. Seitz

Journal of Ceramic Science and Technology, Vol. 6, No. 2 (2015), pp. 141-146

DOI: 10.4416/JCST2015-00013

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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.

Keywords

Porous ceramic, alumina, silicon carbide, 3D printing, additive manufacturing.

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