Investigating the relation between debinding atmosphere and mechanical properties of stereolithography-based three-dimensional printed Al₂O₃ ceramic

Abstract

<jats:p> Ceramic green bodies fabricated by stereolithography-based three-dimensional printing technology often have high loading of ultraviolet curable resins, which produce undesirable phenomena such as cracking, deformation, and blistering during the debinding process. Results showed that compared to argon and vacuum, air atmosphere provided higher flexural strength owing to the elevated density. The differences in microstructure between specimens prepared under these atmospheres were attributed to exothermic oxidation reactions occurred under air when compared to endothermic pyrolysis reactions under vacuum and argon. The debinding atmosphere showed little effect on crystallite size due to the elevated sintering temperature, which would determine the final crystallite size of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>. Debinding under air atmosphere resulted in flexural strength of 176.69 MPa and open porosity of 23.4%. The flexural strength of the ceramics debinded in air was 21.6% higher than the ceramics debinded in argon atmosphere. </jats:p>

Effects of Solvent Debinding on the Microstructure and Properties of 3D-Printed Alumina Ceramics

“…The samples without impregnation in any solvents exhibited a greater flexural strength of about 138.5 MPa . This phenomenon indicated that solvent debinding tends to lead a smaller flexural strength when compared with the samples without impregnation in any solvents.…”

“…The samples without impregnation in any solvents exhibited a greater flexural strength of about 138.5 MPa. 40 This phenomenon indicated that solvent debinding tends to lead a smaller flexural strength when compared with the samples without impregnation in any solvents. The influence factors on the flexural strength of the ceramics are complex, which may be determined by microstructures, physical properties, cracks, and other factors.…”

Three-Dimensional Printing of Large-Scale, High-Resolution Bioceramics with Micronano Inner Porosity and Customized Surface Characterization Design for Bone Regeneration

“…Due to the high brittleness and shrinkage of ceramics during printing and sintering, it is difficult to obtain large-dimension bioceramics. Furthermore, for application in biomedical implants, it is usually necessary to prepare internal porous architectures in the implants . Three-dimensional printing technology is an effective strategy used for the fabrication of porous architecture bioceramics. , Direct ink writing (DIW) (ink- and binder-jetting) is a classic 3D printing technique owing to its relative simplicity and compatibility with numerous materials.…”

On 3D printing of electro-active PVDF-Graphene and Mn-doped ZnO nanoparticle-based composite as a self-healing repair solution for heritage structures

“…is very effective to improve the usage of virgin and recycled plastics and one can easily control their viscosity and thermomechanical properties during printing. [6][7][8][9][10][11] Some studies reported on biomedical applications and thermal conductivity of PVDF highlighted that such special polymers with phase changing and chemical stability capabilities can be investigated intensely for many other aspects. 12,13 Based upon reported literature it has been observed that large-scale applications of 3D printing in construction are being explored by the researchers to reduce the cost and time of construction, its repair, and maintenance.…”