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Analysis of the Electroconsolidation Process of Fine-Dispersed Structures Out of Hot Pressed Al 2 O 3 –WC Nanopowders.
- Source :
-
Materials (1996-1944) . Nov2021, Vol. 14 Issue 21, p6503. 1p. - Publication Year :
- 2021
-
Abstract
- Fabrication of alumina–tungsten carbide nanocomposite was investigated. Characteristics of the densification and sintering were analyzed considering both the nano-size particle starting powders and the processing stages. Different heating rates were generated during densification and consolidation with a maximal load was applied only after a temperature of 1000 °C was reached. Due to the varying dominance of different physical processes affecting the grains, appropriate heating rates and pressure at different stages ensured that a structure with submicron grains was obtained. With directly applied alternating current, it was found that the proportion Al2O3 (50 wt.%)–WC provided the highest fracture toughness, and a sintering temperature above 1600 °C was found to be disadvantageous. High heating rates and a short sintering time enabled the process to be completed in 12 min, saving energy and time. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ALUMINUM oxide
*YTTRIUM aluminum garnet
*ALTERNATING currents
*FRACTURE toughness
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 14
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Materials (1996-1944)
- Publication Type :
- Academic Journal
- Accession number :
- 153594378
- Full Text :
- https://doi.org/10.3390/ma14216503