Influence of the forming method on flash sintering of ZnO ceramics

Pressure‐assisted flash sintering of ZnO ceramics

“…However, no phase change can be found in the XRD patterns (Figure ), which means that there is no significant chemical reaction between ZnO and C during flash sintering. Second, the pulsed current density used in this work is about 1–2 orders of magnitude higher than in other AC/DC flash sintering works, 10,11,23,24,50,53,56–60 which may promote the point defect formation in flash‐sintered ZnO sample and increase its conductivity 61 …”

Reactive Flash Sintering of Ceramics: A Review

“…It is worth mentioning that even green density gradients from the forming method have been recently shown to produce local thermal gradients during FS of YSZ and ZnO. [ 106,107 ] Nevertheless, microscopic thermal gradients may also be produced, providing an additional driving force for diffusion, as proposed by Biesuz et al [ 105 ]…”

“…It is worth mentioning that even green density gradients from the forming method have been recently shown to produce local thermal gradients during FS of YSZ and ZnO. [106,107] Nevertheless, microscopic thermal gradients may also be produced, providing an additional driving force for diffusion, as proposed by Biesuz et al [105] Chaim [108] first suggested that the high current concentration at interparticle contacts causes not only localized overheating but also local melting. The rapid densification in FS would then be achieved by particle rearrangement due to the spreading of the liquid phase.…”

“…Finally, some reports suggest that particle arrangement [96,134] could also play an important role in flash experiments since the electrical contact among powder particles in a green body is influenced by its green density, [106,107] particle size, [155,156] and dispersion. [50]…”

Flash Sintering Research Perspective: A Bibliometric Analysis

“…Most of these publications deal with the understanding of the FS mechanisms in ceria and titania [62,94] or the correlation between the effect of the experimental parameters and the induced defects on the final properties and microstructure of the flash-sintered materials [51,[95][96][97][98]. Many of these documents are co-authored by early-stage researchers, such as Lavagnini [51] and Storion [96], both PhD students at the University of São Paulo (Brazil), or Phuah [95,98] and Mishra [94,97] who recently obtained their PhD degrees from Purdue University (USA) and Forschungszentrum Jülich (Germany), respectively. This is an indication that many earlystage researchers are developing their careers in FS and are making important contributions to the field.…”