Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 95, Issue 11, Pages 3387-3393Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1551-2916.2012.05368.x
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- German Science Foundation (DFG) through the Cluster of Excellence Engineering of Advanced Materials - EAM
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We report the sintering of 3D-printed composites of 13-93 bioactive glass and hydroxyapatite (HAp) powders. The sintering process is characterized on conventionally produced powder compacts with varying HAp content. A numeric approximation of the densification kinetics is then obtained on the basis of Frenkel, Mackenzie-Shuttleworth, and Einstein-Roscoe models, and optimized sintering conditions for 3D-printed structures are derived. Fully isotropic sintering of complex cellular composites is obtained by continuous heating to 750 degrees C at a rate of 2 K/min for a HAp content of 40 wt%. The approach can readily be generalized for printing and sintering of similar glass-ceramic composites.
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