Effects of CNTs content on microstructure and mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites
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Abstract
Abstract In this work, CNTs and short carbon fiber reinforced α-Al2O3 matrix composites (i.e., Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3) were prepared by sol-gel dispersing method followed by hot pressing process. Effects of CNTs content on the mechanical properties of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites were investigated and the inter- and transgranular fracture mechanisms in Cnt-Csf/α-Al2O3 composites were analyzed. The hardness and relative density of Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites slightly decrease as CNTs content increases. The flexural strength and fracture toughness monotonically increase with the increase in Cnt content for both Cnt/α-Al2O3 and Cnt-Csf/α-Al2O3 composites. Addition of Csf and CNTs into α-Al2O3 matrix results in a bimodal grain size microstructure of Cnt-Csf/α-Al2O3 composites, which accounts for the unique fractograph and the enhanced toughness of Cnt-Cf/α-Al2O3 composites. The flexural strength and fracture toughness of Csf5-nt06 composite are 465 MPa and 7.08 MPa/m2, 37% and 13% higher than that of Cnt06, and 42% and 34% higher than that of Csf5, respectively.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · Advanced materials and composites
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References (30)
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1. Preparation and mechanical performance of ductile Csf/Al2O3–BN composites—Part 2: effects of fiber contents and ablation properties10.1016/j.ceramint.2016.04.003 ↗
2. Reinforcement of Al2O3/TiC ceramic tool material by multi-layer graphene10.1016/j.ceramint.2017.05.353 ↗
3. Synergistic effect of hybrid carbon nanotube and graphene nanoplatelets reinforcement on processing, microstructure, interfacial stress and mechanical properties of Al2O3 nanocomposites10.1016/j.ceramint.2017.10.160 ↗
4. Preparation and mechanical performance of ductile Csf/Al2O3–BN composites, Part 1: effects of fiber length and sintering temperature10.1016/j.ceramint.2016.03.077 ↗
5. Mode I fracture toughness prediction for multiwalled-carbon-nanotube reinforced ceramics10.1016/j.engfracmech.2015.08.013 ↗
6. Preparation and characterization of continuous alumina based fiber reinforced with orientated mullite whisker10.1016/j.cej.2014.12.101 ↗
7. The effect of sintering additive on fracture behavior of carbon-whisker-reinforced silicon carbide composites10.1016/j.msea.2007.08.034 ↗
8. Sinter and hot isostatic pressing (HIP) of multi-wall carbon nanotubes (MWCNTs) reinforced ZTA nanocomposite: microstructure and fracture toughness10.1016/j.ijrmhm.2009.12.007 ↗
9. Recent advances in understanding the reinforcing ability and mechanism of carbon nanotubes in ceramic matrix composites
10. Improving CNT distribution and mechanical properties of MWCNT reinforced alumina matrix10.1016/j.msea.2014.08.052 ↗
11. Spark plasma sintering of multi-, single/double- and single-walled carbon nanotube-reinforced alumina composites: is it justifiable the effort to reinforce them?10.1016/j.ceramint.2015.09.060 ↗
12. Preparation and mechanical properties of short carbon fibers reinforced α-Al2O3-based composites10.1016/j.ceramint.2018.07.163 ↗
13. Das, Microstructure and physicomechanical properties of pressureless sintered multiwalled carbon nanotube/alumina nanocomposites10.1016/j.ceramint.2011.07.023 ↗
14. Plasma sprayed carbon nanotube and graphene nanoplatelets reinforced alumina hybrid composite coating with outstanding toughness10.1016/j.jallcom.2017.08.160 ↗
15. Developments in oxide fiber composites10.1111/j.1551-2916.2006.01342.x ↗
16. Microstructure and flexural properties of multilayered fiber-reinforced oxide composites fabricated by a novel lamination route10.1016/j.ceramint.2015.02.120 ↗
17. Fabrication technologies for oxide-oxide ceramic matrix composites based on electrophoretic deposition10.1016/j.jeurceramsoc.2005.03.251 ↗
18. The effect of carbon nanotubes microstructures on reinforcing properties of SWNTs/alumina composite10.1016/j.materresbull.2007.10.026 ↗
19. Fabrication and mechanical properties of WC-Al2O3 cemented carbide reinforced by CNTs10.1016/j.matchemphys.2017.08.018 ↗
20. Direct observation of toughening mechanisms in carbon nanotube ceramic matrix composites10.1016/j.actamat.2003.10.050 ↗
21. Microstructure and flexural properties of multilayered fiber-reinforced oxide composites fabricated by a novel lamination route10.1016/j.ceramint.2015.02.120 ↗
22. Preparation and characterization of transparent boehmite (γ-AlOOH) Sol
23. Toughening effect of short carbon fibers in the ZrB2–ZrSi2 ceramic composites10.1016/j.matdes.2015.03.006 ↗
24. Fabrication and mechanical properties of WC-Al2O3 cemented carbide reinforced by CNTs10.1016/j.matchemphys.2017.08.018 ↗
25. Synthesis and characterization of pressureless sintered carbon nanotube reinforced alumina nanocomposites10.1016/j.msea.2013.04.020 ↗
26. Pressureless sintering of carbon nanotube–Al2O3 composites10.1016/j.jeurceramsoc.2009.12.005 ↗
27. Rahaman · 2003
28. The role of CuO–TiO2 additives in the preparation of highstrength porous alumina scaffolds using directional freeze casting10.1007/s10934-015-0107-6 ↗
29. Meyers · 2009
30. Rice · 2000