Effects of solid loading on stereolithographic additive manufactured ZrO2 ceramic: A quantitative defect study by X-ray computed tomography

Zhang, Keqiang; Meng, Qiaoyu; Cai, Naijia; Qu, Zhaoliang; He, Rujie

doi:10.1016/j.ceramint.2021.05.149

Cited by 29 publications

(4 citation statements)

References 38 publications

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“…Although the microstructure of Al 2 O 3 sintered ceramics has been performed by SEM, and defects have been found, three-dimensional (3D) characterization of structures and defects within the sintered ceramics still needs inspection and discussion. X-CT is one of the most practical ways of non-invasive imaging technology, which can simultaneously carry out both the geometrical features and defects distribution of manufactured parts [26][27] . Fig.…”

Section: Discussionmentioning

confidence: 99%

Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing

Liu¹,

Yan²,

Zhang³

et al. 2022

Journal of Inorganic Materials

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Section: Discussionmentioning

confidence: 99%

Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing

Liu¹,

Yan²,

Zhang³

et al. 2022

Journal of Inorganic Materials

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“…Besides, the lateral fracture was attributed to the interfaces between the layers [33]. Extensive defects appeared on the interfaces between the layers after sintering, leading to weak interface strength [34]. Under the compressive loading, inclined struts in the CCSs tended to rotate around the joints.…”

Section: Effect Of Relative Densitymentioning

confidence: 99%

Mechanical properties of additively-manufactured cellular ceramic structures: A comprehensive study

Zhang

et al. 2022

J Adv Ceram

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Cellular ceramic structures (CCSs) are promising candidates for structural components in aerospace and modern industry because of their extraordinary physical and chemical properties. Herein, the CCSs with different structural parameters, i.e., relative density, layer, size of unit cells, and structural configuration, were designed and prepared by digital light processing (DLP)-based additive manufacturing (AM) technology to investigate their responses under compressive loading systematically. It was demonstrated that as the relative density increased and the size of the unit cells decreased, the mechanical properties of one-layer CCSs increased. The mechanical properties of three-layer CCSs were more outstanding than those of the CCSs with one and two layers. In addition, structural configurations also played a vital role in the mechanical properties of the CCSs. Overall, the mechanical properties of the CCSs from superior to inferior were that with the structural configurations of modified body-centered cubic (MBCC), Octet, SchwarzP, IWP, and body-centered cubic (BCC). Furthermore, structural parameters also had significant impacts on the failure mode of the CCSs under compressive loading. As the relative density increased, the failure mode of the one-layer CCSs changed from parallel—vertical—inclined mode to parallel—vertical mode. It was worth noting that the size of the unit cells did not alter the failure mode. Inclined fracture took a greater proportion in the failure mode of the multi-layer CCSs. But it could be suppressed by the increased relative density. Similarly, the proportions of the parallel—vertical mode and the fracture along a specific plane always changed with the variation of the structural configurations. This study will serve as the base for investigating the mechanical properties of the CCSs.

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“…X-ray computed tomography (XCT) technology can obtain internal information of materials and has become an established technique for nondestructive analysis [ 16 , 17 , 18 ]. In our previous study, the effects of solid loading on the defects and mechanical performance of additively manufactured zirconia ceramic were studied by XCT analysis [ 19 ]. Saâdaoui et al successfully applied XCT analysis for the non-destructive detection of typical defects in additive-manufactured zirconia.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Flaw Evolution of Additively Manufactured Al2O3 Ceramic by In Situ X-ray Computed Tomography

et al. 2022

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The additive manufacturing process may create flaws inside ceramic materials. The flaws have a significant influence on the macroscopic mechanical behavior of ceramic materials. In order to reveal the influence of flaws on the mechanical behavior of additively manufactured ceramic, flaw evolution under mechanical loads was studied by in situ X-ray computed tomography (XCT) in this work. In situ compression XCT tests were conducted on stereolithographic additively manufactured Al2O3 ceramic. The three-dimensional full-field morphologies at different compressive loads were obtained. The evolution of flaws, including pores, transverse cracks, and vertical cracks, during compressive loading was observed. The number and volume of pores, transverse cracks, and vertical cracks were extracted. It was found that most pores and transverse cracks tend to be compacted. However, high compressive loads cause vertical cracks near the upper surface to expand, leading to the failure of the specimen. Real flaws with morphological and positional information were introduced into the finite element models. The influence of different types of flaws on the mechanical behavior is discussed. It was found that vertical cracks have a greater influence on mechanical behavior than do transverse cracks under compression. The presence of transverse cracks contributes to the evolution of vertical cracks. This study may be helpful for process optimization and performance enhancement of additively manufactured ceramic materials.

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Effects of solid loading on stereolithographic additive manufactured ZrO2 ceramic: A quantitative defect study by X-ray computed tomography

Cited by 29 publications

References 38 publications

Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing

Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing

Mechanical properties of additively-manufactured cellular ceramic structures: A comprehensive study

Investigation on Flaw Evolution of Additively Manufactured Al2O3 Ceramic by In Situ X-ray Computed Tomography

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Effects of solid loading on stereolithographic additive manufactured ZrO2 ceramic: A quantitative defect study by X-ray computed tomography

Cited by 29 publications

References 38 publications

Effect of Solid Loading on the Property of Al2O3 Ceramics in Stereolithographic Additive Manufacturing

Effect of Solid Loading on the Property of Al2O3 Ceramics in Stereolithographic Additive Manufacturing

Mechanical properties of additively-manufactured cellular ceramic structures: A comprehensive study

Investigation on Flaw Evolution of Additively Manufactured Al2O3 Ceramic by In Situ X-ray Computed Tomography

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Product

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Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing

Effect of Solid Loading on the Property of Al₂O₃ Ceramics in Stereolithographic Additive Manufacturing