Press-compaction-assisted binder jetting of textured ceramics
MOGHADASI M. 1, MAHDAVIARAB A. 1, HOFER A. 2, BERMEJO R. 2, PEI Z. 1, MA C. 1
1 Texas A&M University, College Station, United States; 2 University of Leoben, Leoben, Austria
The present study reports the successful production of textured ceramics through press-compaction-assisted binder jetting, using a feedstock powder comprising alumina nanoparticles and nanoplatelets. The nanoplatelets acted as templates for epitaxial grain growth during sintering, while the nanoparticles were consumed by the grain growth process. The nanoplatelet fraction in the feedstock powder was varied from 0 wt.% to 50 wt.% to investigate its effect on the sintered density, degree of texture, and flexural strength. The findings revealed that an increase in the nanoplatelet fraction led to a decrease in sintered density but an increase in the degree of texture. Interestingly, the flexural strength of the sintered samples containing 5 wt.% or 10 wt.% nanoplatelets was higher than those without nanoplatelets. This observation suggests that the enhancement in the degree of texture has a more significant impact on flexural strength than the reduction in the sintered density.