Key microstructural characteristics in flash sintered 3YSZ critical for enhanced sintering process
Source abstract
Abstract
Abstract To explore the fundamental flash sintering mechanisms in yttria-stabilized zirconia (3YSZ), a detailed microstructural characterization based on transmission electron microscopy (TEM) has been conducted on 3YSZ flash sintered in air and Ar atmospheres. The study combines the surface morphology characterization via scanning electron microscopy (SEM) and the detailed grain structure analysis based on TEM. The results show that large clusters are comprised of very fine nanocrystalline subgrains, possibly caused by global grain boundary sliding and grain rotation which occur during the flash sintering process. Dislocation arrays were found near grain boundary triple junctions, suggesting the high mass transport rate during the rapid densification process in flash sintering. Yttrium-segregation was observed at grain boundaries near triple junctions as the result of the electrochemical forces.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Flash sintering of nanograin zirconia in < 5 s at 850 C10.1111/j.1551-2916.2010.04089.x ↗
2. The effect of electric field on sintering and electrical conductivity of titania10.1111/jace.12682 ↗
3. Flash sintering of nanocrystalline zinc oxide and its influence on microstructure and defect formation10.1111/jace.12972 ↗
4. Field assisted and flash sintering of alumina and its relationship to conductivity and MgO-doping10.1016/j.jeurceramsoc.2011.07.004 ↗
5. Preliminary investigation of flash sintering of SiC10.1016/j.jeurceramsoc.2013.04.023 ↗
6. Flash spark plasma sintering (FSPS) of pure ZrB210.1111/jace.13109 ↗
7. Field assisted sintering of ceramic constituted by alumina and yttria stabilized zirconia10.1016/j.jeurceramsoc.2014.02.042 ↗
8. A first report of photoemission in experiments related to flash sintering10.1111/jace.13130 ↗
9. Electroluminescence and the measurement of temperature during Stage III of flash sintering experiments10.1016/j.jeurceramsoc.2015.03.040 ↗
10. Joule heating during flash-sintering10.1016/j.jeurceramsoc.2012.02.030 ↗
11. Electrical characteristics of flash sintering: thermal runaway of Joule heating10.1016/j.jeurceramsoc.2014.12.022 ↗
12. Flash sintering as a nucleation phenomenon and a model thereof10.1016/j.jeurceramsoc.2014.04.043 ↗
13. A new mechanism for field-assisted processing and flash sintering of materials10.1016/j.scriptamat.2013.02.020 ↗
14. Flash‐sinterforging of nanograin zirconia: field assisted sintering and superplasticity10.1111/j.1551-2916.2011.04855.x ↗
15. Impedance spectroscopy and dielectric properties of flash versus conventionally sintered yttria‐doped zirconia electroceramics viewed at the microstructural level10.1111/jace.12567 ↗
16. Electrode effects on microstructure formation during FLASH sintering of yttrium‐stabilized zirconia10.1111/jace.14234 ↗
17. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set10.1103/PhysRevB.54.11169 ↗
18. Generalized gradient approximation made simple10.1103/PhysRevLett.77.3865 ↗
19. Projector augmented-wave method10.1103/PhysRevB.50.17953 ↗
20. From ultrasoft pseudopotentials to the projector augmented-wave method10.1103/PhysRevB.59.1758 ↗
21. Chase · 1998
22. Composition, structure, and stability of RuO2(110) as a function of oxygen pressure10.1103/PhysRevB.65.035406 ↗
23. Structure of SrTiO3 films on Si10.1103/PhysRevLett.108.166101 ↗
24. FiPy: partial differential equations with python10.1109/MCSE.2009.52 ↗
25. Effect of oxygen partial pressure on temperature for onset of flash sintering 3YSZ10.1016/j.jeurceramsoc.2017.09.009 ↗
26. Promoting the flash sintering of ZnO in reduced atmospheres to achieve nearly full densities at furnace temperatures of < 120 C10.1016/j.scriptamat.2015.04.027 ↗
27. Two unique measurements related to flash experiments with yttria-stabilized zirconia10.1111/jace.15114 ↗
28. First-principles calculations for point defects in solids10.1103/RevModPhys.86.253 ↗
29. Particle size effects in flash sintering10.1016/j.jeurceramsoc.2012.04.028 ↗
30. Sintering and densification of nanocrystalline ceramic oxide powders: a review10.1179/174367508X297812 ↗
31. Densification mechanisms in spark plasma sintering of nanocrystalline ceramics10.1016/j.msea.2006.07.092 ↗
32. Beyond flash sintering in 3 mol% yttria stabilized zirconia10.2109/jcersj2.15248 ↗
33. High temperature deformability of ductile flash-sintered ceramics via in-situ compression10.1038/s41467-018-04333-2 ↗
34. Segregation aspects in the ZrO2-Y2O3 ceramic system10.1007/BF00720250 ↗
35. Grain size control of tetragonal zirconia polycrystals using the space charge concept10.1111/j.1151-2916.1990.tb06449.x ↗
36. Contribution of the space charge to the grain boundary energy in yttria-stabilized zirconia10.1007/s10853-014-8331-z ↗
37. Activation energy and grain growth in nanocrystalline Y-TZP ceramics10.1016/j.msea.2007.09.022 ↗
38. Densification kinetics of flash sintered 3 mol% Y2O3 stabilized zirconia10.1016/j.jallcom.2018.02.308 ↗
39. K.S.N. Vikrant, R.E. García, Charged grain boundary transitions in ionic ceramics for energy applications, NPJ COMPUT MATER, 2018 (under review).10.1038/s41524-019-0159-2 ↗