Spark plasma sintering of fine-grained alumina ceramics reinforced with alumina whiskers
Source abstract
Abstract
Densification of alumina whisker-reinforced alumina ceramics by spark plasma sintering (SPS) has been investigated with the aim of obtaining a fine-grained microstructure and also studying the effect of whisker addition on the room-temperature mechanical properties. It was found that whisker addition retards slightly the sinterability of alumina by whisker hindering of particle rearrangement. Besides, the internal stress on the alumina matrix particles reduced due to the presence of a whisker network structure of strong rigid boundaries. Nevertheless near fully-dense and fine-grained alumina ceramics with alumina whisker content between 3 wt% and 10 wt% could be obtained under appropriate SPS conditions. The hardness of alumina ceramics with 3 wt% was comparable to that of pure alumina ceramics (∼26 GPa) whereas its fracture toughness (5.6 MPa m) was higher (4.2 MPa m). Crack bridging by well-dispersed whiskers and whiskers pull-out were identified as the main toughening mechanisms.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Ferroelectric and Piezoelectric Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Automotive and industrial applications of structural ceramics in Japan10.1016/j.jeurceramsoc.2007.09.016 ↗
2. A new look at the influences of load, grain size, and grain boundaries on the room temperature hardness of ceramics10.1016/S0263-4368(98)00056-0 ↗
3. Effect of TiC addition on the mechanical behavior of Al2O3-SiC whiskers composites obtained by SPS10.1016/j.jeurceramsoc.2016.01.050 ↗
4. Fundamental aspects of spark plasma sintering: I. Experimental analysis of scalability10.1111/j.1551-2916.2012.05203.x ↗
5. Densification of alumina by SPS and HP: a comparative study10.1016/j.jeurceramsoc.2011.10.031 ↗
6. Spark plasma sintering of alumina: study of parameters, formal sintering analysis and hypotheses on the mechanism(s) involved in densification and grain growth
7. Spark plasma sintering kinetics of pure α-alumina10.1111/j.1551-2916.2011.04424.x ↗
8. Sintering behavior, microstructural evolution, and mechanical properties of ultra-fine grained alumina synthesized via in-situ spark plasma sintering10.1016/j.ceramint.2015.11.106 ↗
9. Mechanical properties and microstructure of nano-SiC-Al2O3 composites densified by spark plasma sintering10.1016/S0955-2219(98)00232-5 ↗
10. Pinning effect of SiC particles on mechanical properties of Al2O3-SiC ceramic matrix composites10.1016/S0955-2219(97)00164-7 ↗
11. Mechanical properties of SiCp/Al2O3 ceramic matrix composites prepared by directed oxidation of an aluminum alloy10.1016/j.ceramint.2011.08.042 ↗
12. Spark-Plasma Sintering of Silicon Carbide Whiskers (SiCw) Reinforced Nanocrystalline Alumina10.1111/j.1151-2916.2004.tb07510.x ↗
13. Preparation of in-situ growth TaC whiskers toughening Al2O3ceramic matrix composite10.1016/j.ijrmhm.2012.08.003 ↗
14. The sintering and grain growth behaviour of ceramic–carbon nanotube nanocomposites10.1016/j.compscitech.2010.02.010 ↗
15. Microstructure and mechanical properties of spark plasma sintered Al2O3-SiC-CNTs hybrid nanocomposites10.1016/j.ceramint.2016.05.005 ↗
16. Spark plasma sintering of multi-, single/double- and single walled carbón nanotube-rainforced alumina composites: is it justifiable the effort to rainforce them?10.1016/j.ceramint.2015.09.060 ↗
17. Towards physical properties tailoring of carbon nanotubes-reinforced ceramic matrix composites10.1016/j.jeurceramsoc.2012.04.018 ↗
18. Colloidal processing of carbon nanotube/alumina composites10.1021/cm020736q ↗
19. In situ carbon nanotube reinforcements in a plasma-sprayed aluminum oxide nanocomposite coating10.1016/j.actamat.2007.10.038 ↗
20. Improvement of flexure strength and fracture toughness in alumina matrix reinforced with carbon nanotube10.1016/j.msea.2009.04.035 ↗
21. Mechanical and electrical properties of multi-walled CNT-alumina nanocomposites prepared by a sequential two step processing of ultrasonic spray pyrolysis and spark plasma sintering10.1111/j.1551-2916.2011.04689.x ↗
22. Densification and microstructure of Al2O3–cBN composites prepared by spark plasma sintering10.2109/jcersj2.116.744 ↗
23. Al2O3-cNB composites sintered by SPS and HPHT methods10.1016/j.jeurceramsoc.2016.01.027 ↗
24. Spark plasma sintering technique for reaction sintering of Al2O3/Ni nanocomposite and its mechanical properties10.1016/j.ceramint.2006.08.017 ↗
25. Development of single-crystal α-Al2O3 fibers by Vapor-Liquid-Solid Deposition (VLS) from aluminum and powdered silica10.1002/(SICI)1521-4095(199801)10:2<138::AID-ADMA138>3.0.CO;2-A ↗
26. Method for production of α-Alumina Whiskers via Vapor–Liquid–Solid Deposition10.1111/j.1151-2916.2003.tb03540.x ↗
27. On the Vickers indentation fracture toughness test10.1111/j.1551-2916.2006.01482.x ↗
28. A critical evaluation of indentation techniques for measuring fracture youghness: I, Direct Crack Measurement10.1111/j.1151-2916.1981.tb10320.x ↗
29. On the microstructure of single wall carbon nanotubes reinforced ceramic matrix composites10.1007/s10853-009-4126-z ↗