1. Analysis of the Electroconsolidation Process of Fine-Dispersed Structures Out of Hot Pressed Al 2 O 3 –WC Nanopowders.
- Author
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Gevorkyan, Edwin, Rucki, Mirosław, Krzysiak, Zbigniew, Chishkala, Volodymyr, Zurowski, Wojciech, Kucharczyk, Wojciech, Barsamyan, Voskan, Nerubatskyi, Volodymyr, Mazur, Tomasz, Morozow, Dmitrij, Siemiątkowski, Zbigniew, and Caban, Jacek
- Subjects
ALUMINUM oxide ,YTTRIUM aluminum garnet ,ALTERNATING currents ,FRACTURE toughness - 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 Al
2 O3 (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]- Published
- 2021
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