Flash Sintering

Olevsky, Eugene A.; Dudina, Dina V.

doi:10.1007/978-3-319-76032-2_5

Cited by 2 publications

(3 citation statements)

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“…44 It is an electric-field-assisted consolidation technology in which a DC/AC electric field is applied to a compact powder placed in between two electrodes. 45,46 This technique involves Joule effect with rapid heating and densification of the compact material that is a key factor to fabricate highdensity ceramic materials. 47 More recently, gadolinium zirconate (Gd 2 Zr 2 O 7 ) was synthesized successfully by flash-assisted sintering in 60 s with an applied electric field of 100 V/cm.…”

Section: Introductionmentioning

confidence: 99%

“…Our quest for developing a cost‐effective and efficient process for the synthesis of MAX phase was inspired by “flash sintering (FS)” that has been regarded as a promising sintering technique in recent years 44 . It is an electric‐field‐assisted consolidation technology in which a DC/AC electric field is applied to a compact powder placed in between two electrodes 45,46 . This technique involves Joule effect with rapid heating and densification of the compact material that is a key factor to fabricate high‐density ceramic materials 47 .…”

Section: Introductionmentioning

confidence: 99%

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Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase

et al. 2022

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A galaxy of new two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides (MXenes) have outperformed other 2D nanomaterials in numerous promising applications due to their extraordinary properties. However, the synthesis of MAX phase is pertinent as it is the only precursor for the development of 2D MXenes. As many conventional MAX phase synthesis procedures are complex, time-and power consuming, we have introduced a novel electric-fieldassisted flash sintering technique for a rapid synthesis of Ti 3 SiC 2 MAX phase in both air and vacuum, facilitated by Joule heating effect. The flashing event was observed with an uncontrollable rise in current flow (∼255 mA/mm 2 ) on the application of voltage in a range of 35-42 V/cm. Experimental outcome predicted that Ti 3 SiC 2 MAX phase was synthesized by applying an electric field.Here we support the experimental findings through computational approach by using density functional theory calculations. We also report the synthesis of 2D Ti 3 C 2 T X MXene from flash-synthesized Ti 3 SiC 2 MAX phase. The scientific innovation discussed here could be a breakthrough in the rapid synthesis of different MAX phases with great potential for implementation in industrial scale.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase

et al. 2022

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“…Recent advancements in electric current activated/assisted sintering techniques (ECAS) are shown to be promising for the processing of advanced materials due to significant enhancement of densification kinetics at lower furnace temperatures, when compared with conventional sintering technologies 27‐30 . Technologies like, Spark Plasma Sintering (SPS) also referred in the literature as Field Assisted Sintering/Spark Plasma Sintering (FAST/SPS) 29 or flash sintering 31,32 are attractive due to the lower furnace temperature and shorter dwell time required for fabricating dense materials.…”

Section: Introductionmentioning

confidence: 99%

Development of a processing map for safe flash sintering of gadolinium‐doped ceria

et al. 2021

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Flash sintering was discovered in 2010, where a dog-bone shaped zirconia sample was sintered at a furnace temperature of 850 o C in < 5s by applying electric fields of ~100 V cm -1 directly to the specimen. Since its discovery, it has been successfully applied to several if not all oxides and even ceramics of complex compositions. Among several processing parameters in flash sintering, the Accepted ArticleThis article is protected by copyright. All rights reserved electrical parameters i.e. electric field and electric current were found to influence the onset temperature for flash and the degree of densification respectively. In this work, we have systematically investigated the influence of the electrical parameters on the onset temperature, densification behavior and microstructure of the flash sintered samples. In particular, we focus on the development of a processing map that delineates the safe and fail regions for flash sintering over a wide range of applied current densities and electric fields. As a proof of concept, Gadolinium-doped Ceria (GDC) is shown as an example for developing of such a processing map for flash sintering, which can also be transferred to different materials systems. Localization of current coupled with hot spot formation and crack formation are identified as two distinct failure mode in flash sintering. The grain size distribution across the current localized and nominal regions of the specimen was analyzed. The specimens show exaggerated grain growth near the positive electrode (anode). The region adjacent to the negative electrodes (cathode) showed retarded densification with large concentration of isolated pores. The electrical conductivity of the flash sintered and conventional sintered samples shows identical electrical conductivity. This quantitative analysis indicates that similar sintering quality of the GDC can be achieved by flash sintering at temperature as low as 680° C.

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Flash Sintering

Cited by 2 publications

References 50 publications

Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase

Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase

Development of a processing map for safe flash sintering of gadolinium‐doped ceria

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Flash Sintering

Cited by 2 publications

References 50 publications

Electric‐field assisted ultrafast synthesis of Ti3SiC2 MAX phase

Electric‐field assisted ultrafast synthesis of Ti3SiC2 MAX phase

Development of a processing map for safe flash sintering of gadolinium‐doped ceria

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Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase

Electric‐field assisted ultrafast synthesis of Ti₃SiC₂ MAX phase