Research into the mechanical properties, sintering mechanism and microstructure evolution of Al2O3-ZrO2 composites fabricated by a stereolithography-based 3D printing method

Wu, Ziwei; Liu, Wei; Wu, Haidong; Huang, Rongji; He, Rongxuan; Jiang, Qiangguo; Chen, Yan; Ji, Xuanrong; Tian, Zhiling; Wu, Shanghua

doi:10.1016/j.matchemphys.2017.12.021

Cited by 102 publications

(40 citation statements)

References 26 publications

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“…As for the conventional shaping with high precision such as gel casting and injection molding, postprocessing could be relatively simple due to the fact that they are near‐net‐forming technologies. However, even for ceramic near‐net forming techniques, sintered bodies often require further machining using carbide or diamond cutting tools, or laser to ensure adequate levels of precision in the size and shape of the fabricated product, eg, zirconia ceramic ferrule with the internal bore diameter of 125 μm used for optical fiber connector produced by injection molding. For micro‐injection molding, the high molds expense could not be avoided .…”

Section: Introductionmentioning

confidence: 99%

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

Liu

Tian

et al. 2018

J Am Ceram Soc

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In this study, we have successfully developed a unique 3D printing approach based on mask-image-projection stereolithography (MIP-SL) to fabricate structural ceramics microcomponents with low cost and high efficiency. Ultra-dense submicron crystalline ceramics without fierce grain growth could be obtained via tailoring the sintering kinetics. The ZrO 2 ceramic microcomponents reached the highest relative density (RD) of 99.7% with the average grain size of 0.52 μm upon sintering at 1550°C while the Al 2 O 3 ceramic microcomponents reached its highest RD of 98.31% with the average grain size of 2.6 μm upon sintering at 1600°C.Oxide ceramics microcomponents of fully flexible design can be produced easily without visible defects via the method developed in this study, which demonstrates significant potential in the applications of microelectromechanical systems, micro-optical electronics systems and micro-opto-electro-mechanical systems. The method developed in this study has addressed the problem successfully by healing the interlayer interface defects in densification process via the sintering kinetic window and microstructure evolution. The current work provides a promising opportunity to fabricate structural ceramic microcomponents with complex shape, high precision, and high surface smoothness. K E Y W O R D S

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Section: Introductionmentioning

confidence: 99%

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

Liu

Tian

et al. 2018

J Am Ceram Soc

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“…Wu et al 46 varied the sintering temperature from 1500 to 1650°C, in 50°C intervals, for the Al 2 O 3 /ZrO 2 composite (75/25 wt%). They observed that the increase in %TD provided higher H v values.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical properties of Al₂O₃/ZrO₂ composites by two‐step sintering

Ojaimi

Ferreira

Chinelatto

et al. 2020

Int J Applied Ceramic Tech

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Composites of Al2O3/ZrO2 (containing 25, 50, and 75 vol% ZrO2) were prepared by mixing Al2O3 and ZrO2 suspensions. The microstructural control via two‐step sintering (TSS) was the main objective of this work. For this purpose, different sintering curves were constructed, aiming to achieve the best temperature combination for the sintering steps that provides higher density and finer microstructure. The results were compared with single‐step sintering (SSS). Furthermore, microhardness and fracture toughness were measured for the best TSS specimens under each composition. The results showed that the high densities were obtained, and the reduction of grain size was greater than 40% for two‐step sintered specimens, compared to SSS ones. Consequently, microhardness values increased. However, fracture toughness values remained unchanged.

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“…He et al 36 fabricated complex and dense zirconia ceramics, and the sintered ceramics displayed significant shrinkage of 35.26%. Wu et al 37 prepared Al 2 O 3 –ZrO 2 ceramics without defects by application of a two-step debinding, and concluded the relationship between sintering temperature and relative density. The sintered ceramics possessed a maximum density of 4.28 g/cm 3 when sintered at 1600 °C.…”

Section: Introductionmentioning

confidence: 99%

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

Liu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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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 Al2O3. 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.

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Research into the mechanical properties, sintering mechanism and microstructure evolution of Al2O3-ZrO2 composites fabricated by a stereolithography-based 3D printing method

Cited by 102 publications

References 26 publications

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

Microstructure and mechanical properties of Al₂O₃/ZrO₂ composites by two‐step sintering

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

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Research into the mechanical properties, sintering mechanism and microstructure evolution of Al2O3-ZrO2 composites fabricated by a stereolithography-based 3D printing method

Cited by 102 publications

References 26 publications

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

3D printing of dense structural ceramic microcomponents with low cost: Tailoring the sintering kinetics and the microstructure evolution

Microstructure and mechanical properties of Al2O3/ZrO2 composites by two‐step sintering

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

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Microstructure and mechanical properties of Al₂O₃/ZrO₂ composites by two‐step sintering

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