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

He, Li; Hu, Kehui; Lu, Zongqing; Liang, Jingjing

doi:10.1021/acsomega.0c03944

Cited by 31 publications

(11 citation statements)

References 38 publications

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“…The flexural strength was approximately 30% higher compared to results obtained by SLS–255 MPa (4PB), reported by Li et al [ 38 ], and 26% higher than conventionally manufactured alumina by powder injection molding with 264 MPa (3PB) reported by J. Y. Roh [ 31 ]. The results are 21% lower (427 MPa, 4PB) compared to the LCM technology reported by Schwentenwein and Homa Schwentenwein and Homa [ 25 ].…”

Section: Resultsmentioning

confidence: 59%

Alumina Manufactured by Fused Filament Fabrication: A Comprehensive Study of Mechanical Properties and Porosity

et al. 2022

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This article deals with a comprehensive study of the processing and mechanical properties of the ceramic material Al2O3 on Fused Filament Fabrication technology (FFF). It describes the basic input analyses of the material, such as TGA, FTIR, and MVR. These analyses enabled the design and testing of process parameters for the 3D printing of parts. The article also presents the post-processes, including the technological parameters required to finalize parts made from this material, i.e., chemical debinding in acetone at elevated temperatures + thermal debinding and sintering. The microhardness was measured on the processed samples, depending on the density of the inner filling. The resulting hardness had an almost linear relationship between the percentage of filler (20–40–60–80–100%) and the resulting microhardness (1382–2428 HV10). Flexural strength was also measured on the test specimens with different degrees of internal filling (80–90–100%). However, inner filling do not affect the flexural strength (316.12–327.84–331.61 MPa). The relative density of the final parts was measured on a ZEISS METROTOM 1500 CT machine and reached 99.54%.

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Section: Resultsmentioning

confidence: 59%

Alumina Manufactured by Fused Filament Fabrication: A Comprehensive Study of Mechanical Properties and Porosity

et al. 2022

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“…This can be explained by the microstructure where porosities or particles are oriented parallel to the manufacturing axis 14,[24][25][26] . Some authors have shown that the shrinkage ratios calculated in the same plane of the printed layer are similar 14,[26][27][28] . However, another study has shown that the anisotropic shrinkage ratio (A)…”

Section: Introductionmentioning

confidence: 92%

Effect of dimensional variations on the manufacturing process and the 3D shrinkage ratio of stereolithographic dental alumina ceramics

et al. 2023

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The purpose of the present study was to evaluate the influence of height and length variations of alumina ceramics manufactured by stereolithography on deformations caused by the manufacturing process and on the 3D shrinkage ratio to control the final dimensions and improve the adaptation of stereolithographic ceramic dental prostheses. Two different U-shaped models were designed with variable heights or lengths. The specimens were manufactured by stereolithography and were scanned using a microtomographic device before and after the heat treatment. Dimensional variations were measured using inspection software. The number and surface of layers of alumina ceramic influenced the reliability of the stereolithography manufacturing but did not influence the 3D shrinkage ratio. The larger the layer surface, the larger the deformation of the ceramic. Dental ceramics manufactured by stereolithography with smallest layer surface are the most reliable. This helps in the selection of the build orientation.

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“…The samples that used oxalic acid as a solvent have shown maximum flexural strength of 63.4 MPa. 137 The butanoneethanol azeotropic solvent is used for the fine dispersion of Al 2 O 3 /SiC whiskers and UV resins. The Al 2 O 3 /SiC part fabricated by the SLA process has shown a fracture toughness of 7.1 MPa•m 1/2 and a hardness of 17.6 GPa.…”

Section: Table 2 Mechanical Properties Of Human Bonementioning

confidence: 99%

Review of Physical, Mechanical, and Biological Characteristics of 3D-Printed Bioceramic Scaffolds for Bone Tissue Engineering Applications

Thangavel

Elsen

2022

ACS Biomater. Sci. Eng.

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This review focuses on the advancements in additive manufacturing techniques that are utilized for fabricating bioceramic scaffolds and their characterizations leading to bone tissue regeneration. Bioscaffolds are made by mimicking the human bone structure, material composition, and properties. Calcium phosphate apatite materials are the most commonly used scaffold materials as they closely resemble live bone in their inorganic composition. The functionally graded scaffolds are fabricated by utilizing the right choice of the 3D printing method and material combinations to achieve the requirement of the bioscaffold. To tailor the physical, mechanical, and biological properties of the scaffold, certain materials are reinforced, doped, or coated to incorporate the functionality. The biomechanical loading conditions that involve flexion, torsion, and tension exerted on the implanted scaffold are discussed. The finite element analysis (FEA) technique is used to investigate the mechanical property of the scaffold before fabrication. This helps in reducing the actual number of samples used for testing. The FEA simulated results and the experimental result are compared. This review also highlights some of the challenges associated while processing the scaffold such as shrinkage, mechanical instability, cytotoxicity, and printability. In the end, the new materials that are evolved for tissue engineering applications are compiled and discussed.

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

Cited by 31 publications

References 38 publications

Alumina Manufactured by Fused Filament Fabrication: A Comprehensive Study of Mechanical Properties and Porosity

Alumina Manufactured by Fused Filament Fabrication: A Comprehensive Study of Mechanical Properties and Porosity

Effect of dimensional variations on the manufacturing process and the 3D shrinkage ratio of stereolithographic dental alumina ceramics

Review of Physical, Mechanical, and Biological Characteristics of 3D-Printed Bioceramic Scaffolds for Bone Tissue Engineering Applications

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