Experiment on Selective Laser Melting Forming of Al<sub>2</sub>O<sub>3</sub> Ceramics

Kai, 张凯 Zhang; Tingting, 刘婷婷 Liu; Wenhe, 廖文和 Liao; Changdong, 张长东 Zhang; Yishuai, 闫以帅 Yan; Daozhong, 杜道中 Du

doi:10.3788/cjl201643.1002007

Cited by 6 publications

(2 citation statements)

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“…When exposed to high-energy laser beams, ceramic powders tend to splash and cannot be effectively deposited. 35 Hence the ceramic slurry was used for practical forming. First, Al 2 O 3 and ZrO 2 powders were mixed.…”

Section: Experimental Methodsmentioning

confidence: 99%

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion

Zhang,

Chen

et al. 2023

J Am Ceram Soc.

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The cracks in Al2O3–ZrO2 eutectic ceramics produced by laser powder bed fusion (LPBF) have a significant impact on their practical applications in various industries. In order to understand the factors influencing crack formation, a systematic study of the characterization and propagation of cracks in single‐track, multi‐track, and bulk samples by varying the process parameters has been carried out in this research. The results showed that parallel cracks can be healed by reducing the scanning spacing and scanning length. Additionally, it was found that using a modest scanning speed and a shorter length can minimize the accumulation of thermal stress, resulting in the suppress crack formation. Based on this conclusion, a crack‐free Al2O3–ZrO2 eutectic ceramic sample was finally obtained under the optimized parameters with the power of 100 W, the scanning speed of 100 mm/s, the hatch spacing of 100 μm, the scanning length of 3 mm, and the layer thickness of 50 μm. Additionally, three typical microstructures, including eutectic, cellular, and dendritic structures, were identified in the LPBF‐fabricated Al2O3–ZrO2 samples. The cellular microstructure showed improved crack inhibition capability due to the deflection and pinning effects. Cracks expand more easily in dendritic and eutectic microstructures, where anisotropy is more prominent.

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Section: Experimental Methodsmentioning

confidence: 99%

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion

Zhang,

Chen

et al. 2023

J Am Ceram Soc.

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“…Furthermore, the powder with excessively small particle size not only has a tendency to agglomerate, resulting in poor fluidity but also has a small contact area between particles under loose accumulation, resulting in poor adhesion. Under instantaneous high laser energy, it is easily blown away due to the reaction force [65]. The precision of the prepared nut is in full compliance with the actual application and can be screwed on the screw.…”

Section: Selective Laser Meltingmentioning

confidence: 96%

Dense ceramics with complex shape fabricated by 3D printing: A review

et al. 2021

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Three-dimensional (3D) printing technology is becoming a promising method for fabricating highly complex ceramics owing to the arbitrary design and the infinite combination of materials. Insufficient density is one of the main problems with 3D printed ceramics, but concentrated descriptions of making dense ceramics are scarce. This review specifically introduces the principles of the four 3D printing technologies and focuses on the parameters of each technology that affect the densification of 3D printed ceramics, such as the performance of raw materials and the interaction between energy and materials. The technical challenges and suggestions about how to achieve higher ceramic density are presented subsequently. The goal of the presented work is to comprehend the roles of critical parameters in the subsequent 3D printing process to prepare dense ceramics that can meet the practical applications.

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Fabrication and mechanical properties of triply period minimal surface porous alumina ceramics based on Digital Light Processing 3D printing technology

Zhang

Sun

et al. 2023

Int J Adv Manuf Technol

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Experiment on Selective Laser Melting Forming of Al₂O₃ Ceramics

Cited by 6 publications

References 0 publications

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion

Dense ceramics with complex shape fabricated by 3D printing: A review

Fabrication and mechanical properties of triply period minimal surface porous alumina ceramics based on Digital Light Processing 3D printing technology

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Experiment on Selective Laser Melting Forming of Al2O3 Ceramics

Cited by 6 publications

References 0 publications

Morphology and formation mechanism of cracks in Al2O3–ZrO2 eutectic ceramics fabricated via laser powder bed fusion

Morphology and formation mechanism of cracks in Al2O3–ZrO2 eutectic ceramics fabricated via laser powder bed fusion

Dense ceramics with complex shape fabricated by 3D printing: A review

Fabrication and mechanical properties of triply period minimal surface porous alumina ceramics based on Digital Light Processing 3D printing technology

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Product

Resources

About

Experiment on Selective Laser Melting Forming of Al₂O₃ Ceramics

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion

Morphology and formation mechanism of cracks in Al₂O₃–ZrO₂ eutectic ceramics fabricated via laser powder bed fusion