Strength of additive manufactured alumina
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in: Journal of the European Ceramic Society, Jahrgang 40.2020, Nr. 14, 21.04.2020, S. 4737-4745.
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TY - JOUR
T1 - Strength of additive manufactured alumina
AU - Schlacher, J.
AU - Lube, T.
AU - Harrer, W.
AU - Mitteramskogler, G.
AU - Schwentenwein, M.
AU - Danzer, R.
AU - Bermejo, R.
PY - 2020/4/21
Y1 - 2020/4/21
N2 - The strength of 3D-printed alumina parts fabricated using the Lithography-based Ceramic Manufacturing (LCM) technology is investigated. The influence of the sintering parameters, printing direction, surface condition (i.e. machined or as-printed), and/or geometry on the strength distribution is studied under uniaxial and biaxial bending tests. Weibull parameters, i.e. characteristic strength and Weibull modulus, are determined and compared between the different samples. Experimental findings show that samples sintered at higher temperatures yield higher Weibull modulus, associated with a more homogeneous microstructure. Fractographic analyses reveal the influence of surface finish (as-printed or machined) on strength and show the importance of reporting testing configuration along with printing direction to assess the mechanical response of 3D-printed parts. Based on these results, manufacturing recommendations are given which shall advance the progress in optimization of alumina ceramics fabricated using the LCM technology.
AB - The strength of 3D-printed alumina parts fabricated using the Lithography-based Ceramic Manufacturing (LCM) technology is investigated. The influence of the sintering parameters, printing direction, surface condition (i.e. machined or as-printed), and/or geometry on the strength distribution is studied under uniaxial and biaxial bending tests. Weibull parameters, i.e. characteristic strength and Weibull modulus, are determined and compared between the different samples. Experimental findings show that samples sintered at higher temperatures yield higher Weibull modulus, associated with a more homogeneous microstructure. Fractographic analyses reveal the influence of surface finish (as-printed or machined) on strength and show the importance of reporting testing configuration along with printing direction to assess the mechanical response of 3D-printed parts. Based on these results, manufacturing recommendations are given which shall advance the progress in optimization of alumina ceramics fabricated using the LCM technology.
KW - Additive manufacturing
KW - Alumina
KW - Fractography
KW - LCM
KW - Strength
UR - http://www.scopus.com/inward/record.url?scp=85083693221&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2020.03.073
DO - 10.1016/j.jeurceramsoc.2020.03.073
M3 - Article
AN - SCOPUS:85083693221
VL - 40.2020
SP - 4737
EP - 4745
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 14
ER -