Effect of Al 2 O 3 ceramic binder on mechanical and microstructure properties of spark plasma sintered WC-Co cermets
| Autor: | Ali Fazili, Esmail Salahi, Mansour Razavi, Leila Nikzad, Mohammad Reza Rahimipour |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Toughness
Materials science 020502 materials Metallurgy Spark plasma sintering Sintering 02 engineering and technology Cermet 021001 nanoscience & nanotechnology Microstructure Fracture toughness 0205 materials engineering visual_art visual_art.visual_art_medium Ceramic 0210 nano-technology Ball mill |
| Zdroj: | International Journal of Refractory Metals and Hard Materials. 69:189-195 |
| ISSN: | 0263-4368 |
| DOI: | 10.1016/j.ijrmhm.2017.08.010 |
| Popis: | This study investigates how the partial replacement of Co with Al 2 O 3 ceramic binder has an effect on the sintering behaviour, microstructure, and final mechanical properties of WC-Co cermets via spark plasma sintering. To examine this, three batches (WC-6 wt%Co, WC-3 wt%Co-3 wt%Al 2 O 3, and WC-6 wt%Al 2 O 3 ) were mixed through high energy ball mill, and sintering was carried out at temperatures of 1350 °C and 1600 °C. The results showed nearly full dense WC-Co cermets at different temperatures. It was shown that WC-6 wt%Al 2 O 3 , in comparison to reference WC-6 wt%Co cermet, not only led to the rise in sintering temperature from 1350 °C to 1600 °C, but also reduced its strength and toughness. But replacing some part of Co with alumina (WC-3 wt%Co-3 wt%Al 2 O 3 ) exhibited the combination of high strength (1095 MPa), hardness (17.62 GPa), and fracture toughness (19.46 MPa·m 1/2 ). |
| Databáze: | OpenAIRE |
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