Multi-stage spark plasma sintering to study the densification mechanisms of boron carbide
Source abstract
Abstract
Abstract The densification kinetics of boron carbide (B4C) during multi-stage spark plasma sintering was studied. The densification mechanisms were analyzed according to the stress exponent n and the apparent activation energy Qd using a creep deformation model. The results showed that the densification mechanisms were controlled by viscous flow and grain boundary diffusion at the low effective stress with initial temperature range of 1600–2000 °C, while the dominant mechanism is the dislocation climb at the effective stress regime with final temperature of 2100 °C and the multi-stage sintering can reduce the apparent activation energy. Meanwhile, the scheme of multi-stage sintering can obtain nearly theoretical dense B4C and avoid grain growth. Therefore, the basic mechanical properties suggesting a good combination of high hardness (37.63GPa) and bending strength (539.86 MPa) was obtained by the multi-stage sintering.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Effect of spark plasma sintering parameters on microstructure and room-temperature hardness and toughness of fine-grained boron carbide (B4C)10.1016/j.jeurceramsoc.2012.08.028 ↗
2. Comparisons of the densification, microstructure and mechanical properties of boron carbide sintered by hot pressing and spark plasma sintering10.1016/j.ceramint.2017.10.230 ↗
3. Additive-free superhard B4C with ultrafine-grained dense microstructures10.1016/j.jeurceramsoc.2013.10.006 ↗
4. Effect of boron carbide composition on its densification behavior during spark plasma sintering (SPS)10.1016/j.ceramint.2018.08.291 ↗
5. Densification kinetics of boron carbide in hot pressing10.1007/BF00794102 ↗
6. Pressureless sintering of boron carbide10.1016/j.ceramint.2005.02.008 ↗
7. Bulk boron carbide nanostructured ceramics by reactive spark plasma sintering10.1016/j.ceramint.2017.03.145 ↗
8. Phase transformation of alumina induced by high pressure spark plasma sintering (HP-SPS)10.1016/j.scriptamat.2018.08.016 ↗
9. Reactive spark plasma sintering (SPS) of nitride reinforced titanium alloy composites10.1016/j.jallcom.2014.08.049 ↗
10. M. Maros B., A.K. Németh, Z. Károly, E. Bódis, Z. Maros, O. Tapasztó, K. Balázsi, Tribological characterisation of silicon nitride/multilayer graphene nanocomposites produced by HIP and SPS technology, Tribol. Int. 93 (2016) 269–281. doi:https://doi.org/10.1016/j.triboint.2015.08.041.10.1016/j.triboint.2015.08.041 ↗
11. FAST/SPS sintering of nanocrystalline zinc oxide-part I: enhanced densification and formation of hydrogen-related defects in presence of adsorbed water10.1016/j.jeurceramsoc.2015.12.009 ↗
12. Densification mechanisms and microstructural evolution during spark plasma sintering of boron carbide powders10.1016/j.ceramint.2017.11.061 ↗
13. Innovative multi-stage spark plasma sintering to obtain strong and tough ultrafine-grained ceramics10.1016/j.scriptamat.2009.11.030 ↗
14. Microstructure-mechanical-tribological property correlation of multistage spark plasma sintered tetragonal ZrO210.1016/j.jeurceramsoc.2010.08.005 ↗
15. Low temperature synthesis of dense and ultrafine grained zirconium diboride compacts by reactive spark plasma sintering10.1016/j.scriptamat.2015.08.005 ↗
16. Achieving uniform microstructure and superior mechanical properties in ultrafine grained TiB2–TiSi2 composites using innovative multi stage spark plasma sintering10.1016/j.msea.2010.09.022 ↗
17. Three-step densification of monolithic SiC ceramics by spark plasma apparatus without sintering additives10.1016/j.ceramint.2016.01.051 ↗
18. Spark plasma sintering of pure tungsten powder: densification kinetics and grain growth10.1016/j.powtec.2017.01.050 ↗
19. Densification behavior of ZrB2–SiC based ultra-high temperature ceramic composites prepared by spark plasma sintering10.1016/j.ceramint.2019.10.246 ↗
20. 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 ↗
21. Hot-isostatic pressing diagrams: new developments10.1016/0001-6160(85)90177-4 ↗
22. Effect of iron on the wetting, sintering ability, and the physical and mechanical properties of boron carbide composites: a review10.1016/j.ijrmhm.2016.02.007 ↗
23. Hot-pressing kinetics and densification mechanisms of boron carbide10.1111/jace.13483 ↗
24. Spark plasma sintering of pure TiCN: densification mechanism, grain growth and mechanical properties10.1016/j.ijrmhm.2017.02.008 ↗
25. Densification kinetics and mechanical properties of tantalum carbide10.1016/j.ijrmhm.2018.02.013 ↗
26. New approach of the evolution of densification mechanisms during spark plasma sintering: application to zirconium (oxy-)carbide ceramics10.1016/j.scriptamat.2015.01.028 ↗
27. Grain boundary diffusion driven spark plasma sintering of nanocrystalline zirconia10.1016/j.ceramint.2011.12.064 ↗
28. Hot-pressing of high-purity magnesium oxide10.1111/j.1151-2916.1984.tb19632.x ↗
29. Critical role of ZrO2 on densification and microstructure development in spark plasma sintered NbB2