Novel approach of the evaluation of electric current density during the spark plasma sintering: Effect on the densification mechanisms of B4C-based ceramics
Source abstract
Abstract
Abstract The densification mechanism of boron carbide is revealed by considering the effect of electromigration induced by electric current during spark plasma sintering (SPS). Different electric current values are obtained by choosing different heating rate, resulting in the different dislocation density as well as densification behavior. The apparent pressure-particle neck area relationship is applied to estimate the instantaneous electric current density, then a densification model was proposed which taking it into account. Higher electric current responds to lower dislocation density and lower apparent activation energy of the mechanism controlling densification. The densification mechanism exhibits a transformation from atom-diffusion-controlled creep deformation mechanism for low electric current to dislocation-glide-controlled mechanism for high electric current.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
Show source-provided references
1. Atom probe tomography study of an Fe25Ni25Co25Ti15Al10 high-entropy alloy fabricated by powder metallurgy10.1016/j.actamat.2019.08.047 ↗
2. Estimation of diffusivity from densification data obtained during spark plasma sintering10.1016/j.scriptamat.2018.10.012 ↗
3. Microstructures and mechanical properties of TiAl alloy prepared by spark plasma sintering10.1016/S1003-6326(09)60044-3 ↗
4. Effect of Ti on microstructure, mechanical properties and corrosion resistance of Zr-Ta-Ti alloys processed by spark plasma sintering10.1007/s11771-020-4440-9 ↗
5. Effects of spark plasma sintering temperature on densification, hardness and thermal conductivity of titanium carbide10.1016/j.ceramint.2018.05.071 ↗
6. Densification mechanisms and microstructural evolution during spark plasma sintering of boron carbide powders10.1016/j.ceramint.2017.11.061 ↗
7. Experimental investigation of electric contact resistance in spark plasma sintering tooling setup10.1111/jace.13621 ↗
8. Effect of electric current on densification behavior of conductive ceramic powders consolidated by spark plasma sintering10.1016/j.actamat.2017.11.010 ↗
9. Direct current-enhanced densification kinetics during spark plasma sintering of tungsten powder10.1016/j.scriptamat.2017.09.009 ↗
10. Densification kinetics of boron carbide with medium entropy alloy as a sintering aid during spark plasma sintering10.1111/ijac.13064 ↗
11. Effect of Al2O3 addition on texturing in a rotating strong magnetic field and densification of B4C10.1016/j.ceramint.2019.06.032 ↗
12. Effect of pulse current on the diffusion behavior of FeCoCrNiMox-Al couples10.1016/j.matlet.2019.07.004 ↗
13. Effect of heating rate on microstructure and mechanical properties of AlCoCrFeNi high entropy alloy produced by spark plasma sintering10.1016/j.matchar.2019.05.022 ↗
14. Current effects on neck growth in the sintering of copper spheres to copper plates by the pulsed electric current method10.1063/1.2743885 ↗
15. Plastic deformation of fine-grained Al2O3 in the presence of an electric field10.1016/S1359-6462(99)00126-8 ↗
16. Fabrication and densification mechanism of MgO/Graphene composites with LiF as additive10.1016/j.scriptamat.2019.08.033 ↗
17. Porosity dependence of powder compaction constitutive parameters: determination based on spark plasma sintering tests10.1016/j.scriptamat.2017.07.026 ↗
18. Viscous flow activation energy adaptation by isothermal spark plasma sintering applied with different current mode10.1016/j.scriptamat.2018.02.024 ↗
19. Applicability of automatic image analysis in quartz-grain shape discrimination for sedimentary setting reconstruction10.1016/j.catena.2021.105602 ↗
20. Effect of low-melting-point sintering aid on densification mechanisms of boron carbide during spark plasma sintering10.1016/j.scriptamat.2018.12.036 ↗
21. Densification and properties of B4C-based ceramics with CrMnFeCoNi high entropy alloy as a sintering aid by spark plasma sintering10.1016/j.powtec.2018.11.005 ↗
22. Hot-isostatic pressing diagrams: new developments10.1016/0001-6160(85)90177-4 ↗
23. The effect of dislocation contrast on x-ray line broadening: a new approach to line profile analysis10.1063/1.117951 ↗
24. Room temperature single crystal elastic constants of boron carbide10.1023/A:1017947625784 ↗
25. Spark plasma sintering of a commercially available granulated zirconia powder: I. Sintering path and hypotheses about the mechanism(s) controlling densification10.1016/j.actamat.2007.01.048 ↗
26. A study of the densification mechanisms during spark plasma sintering of zirconium (oxy-)carbide powders10.1016/j.actamat.2009.12.046 ↗
27. Creep of doped polycrystalline Al2O310.1111/j.1151-2916.1970.tb15983.x ↗