Dielectric properties of nanocomposite ceramics Al2O3 / graphene processed by spark plasma sintering

Stolyarov, V. V.; Frolova, Anna; Sudzhanskaya, I. V.

doi:10.1016/j.ceramint.2019.11.188

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…On the other hand, the width of the particle size distribution affects the kinetics of the sintering process. Stolyarov et al [ 9 ] showed that the wider the particle size distribution, the more intensively the compaction of the material in the initial sintering phase occurs, but at the end of the process, it slows down significantly.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, alumina ceramics have been widely used in the aviation, aerospace, automotive, medicine, and military industries [ 3 , 7 ]. Al 2 O 3 can be used as a tool and as a construction material, which is characterized by a high melting point, compressive strength, corrosion resistance, and a high modulus of elasticity [ 8 , 9 ]. Alumina is also sometimes used by researchers as a material reinforcing the properties of metal matrices, such as aluminum [ 10 , 11 ], copper [ 12 , 13 ], magnesium [ 14 ], or titanium [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Kwiatkowski,

Marczyk,

Putyra

et al. 2023

Materials

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Alumina is one of the most popular ceramic materials widely used in both tooling and construction applications due to its low production cost, and high properties. However, the final properties of the product depend not only on the purity of the powder, but also, e.g., on its particle size, specific surface area, and the production technology used. These parameters are particularly important in the case of choosing additive techniques for the production of details. Therefore, the article presents the results of comparing five grades of Al2O3 ceramic powder. Their specific surface area (via Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) methods), particle size distribution, and phase composition by X-ray diffraction (XRD) were determined. Moreover, the surface morphology was characterized by the scanning electron microscopy (SEM) technique. The discrepancy between generally available data and the results obtained from measurements has been indicated. Moreover, the method of spark plasma sintering (SPS), equipped with the registration system of the position of the pressing punch during the process, was used to determine the sinterability curves of each of the tested grades of Al2O3 powder. Based on the obtained results, a significant influence of the specific surface area, particle size, and the width of their distribution at the beginning of the Al2O3 powder sintering process was confirmed. Furthermore, the possibility of using the analyzed variants of powders for binder jetting technology was assessed. The dependence of the particle size of the powder used on the quality of the printed parts was demonstrated. The procedure presented in this paper, which involves analyzing the properties of alumina varieties, was used to optimize the Al2O3 powder material for binder jetting printing. The selection of the best powder in terms of technological properties and good sinterability makes it possible to reduce the number of 3D printing processes, which makes it more economical and less time-consuming.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Kwiatkowski,

Marczyk,

Putyra

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…However, the main disadvantage of the HP fabrication process is the low productivity, especially in the case of producing larger samples, and most of the process time is spent cooling from the sintering temperature. As a mature powder metallurgy technology, spark plasma sintering (SPS) achieves rapid heating by applying a high‐intensity current to the powder, which can efficiently consolidate the powder material and greatly shorten the processing time 11,12 . Due to the diffusion‐enhancing effect of the pulsed current, the residence time can be reduced 13 .…”

Section: Introductionmentioning

confidence: 99%

“…As a mature powder metallurgy technology, spark plasma sintering (SPS) achieves rapid heating by applying a high-intensity current to the powder, which can efficiently consolidate the powder material and greatly shorten the processing time. 11,12 Due to the diffusion-enhancing effect of the pulsed current, the residence time can be reduced. 13 In addition, the samples cooled faster because, in contrast to HP, the furnace chamber of SPS has no insulating lining.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Al₂O₃‐TiC‐ZrO₂ ceramics with intragranular nanostructure by spark plasma sintering

Wang

Zheng³

et al. 2023

Int J Applied Ceramic Tech

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In this paper, Al2O3‐TiC ceramic composites with intragranular nano‐ZrO2 were prepared in vacuum by spark plasma sintering (SPS). The effect of ZrO2 particles with different nano‐sizes on the microstructure and mechanical properties of ceramics was studied. The results show that SPS can achieve relative densification of materials without generating new impurity phases. At the same time, the sintering densification temperature of ceramic materials can be reduced by adding ZrO2 (20 nm) particles. Under the action of SPS strong electric field, the nano‐ZrO2 adsorbed on the surface of the matrix particles can enter the interior of matrix grains, and form intragranular nanostructures when the grain boundaries move and the particles merge. The microstructure and mechanical properties of ceramic materials can be improved through the intragranular structure formed by nanoparticles. The main reasons for the increased strength and toughness of ceramic materials are crack deflection, crack bridging and transgranular fracture.

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Mechanical and dielectric properties of reduced graphene oxide nanosheets/alumina composite ceramics

Zhou

Qiu

Wang

et al. 2020

Ceramics International

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Dielectric properties of nanocomposite ceramics Al2O3 / graphene processed by spark plasma sintering

Cited by 11 publications

References 21 publications

Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Synthesis and characterization of Al₂O₃‐TiC‐ZrO₂ ceramics with intragranular nanostructure by spark plasma sintering

Mechanical and dielectric properties of reduced graphene oxide nanosheets/alumina composite ceramics

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Dielectric properties of nanocomposite ceramics Al2O3 / graphene processed by spark plasma sintering

Cited by 11 publications

References 21 publications

Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Influence of Alumina Grade on Sintering Properties and Possible Application in Binder Jetting Additive Technology

Synthesis and characterization of Al2O3‐TiC‐ZrO2 ceramics with intragranular nanostructure by spark plasma sintering

Mechanical and dielectric properties of reduced graphene oxide nanosheets/alumina composite ceramics

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Synthesis and characterization of Al₂O₃‐TiC‐ZrO₂ ceramics with intragranular nanostructure by spark plasma sintering