Effects of the liquid phase content on the microstructure and properties of the ZrW2O8 ceramics with negative thermal expansion fabricated by the cold sintering process
| Autor: | Haofan Shi, Jinping Li, Dongliang Yang, Songhe Meng, Cheng Yang, Shanyi Du |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Fabrication Materials science Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Decomposition Negative thermal expansion visual_art Scientific method 0103 physical sciences Vickers hardness test Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology |
| Zdroj: | Journal of the European Ceramic Society. 40:6079-6086 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2020.05.045 |
| Popis: | The liquid phase promotes the sintering densification during cold sintering process (CSP) and has crucial effects on the cold-sintered materials. Herein, ZrW2O8 ceramics with negative thermal expansion (NTE) were successfully fabricated by the CSP at 180 °C and 340 MPa, in which the effects of liquid phase content (0 − 35 wt%) on the microstructure and properties were analyzed in detail. No decomposition phases are detected, and the density and Vickers hardness of the cold-sintered samples first increase with the liquid phase content up to 25 wt%, then keep almost constant with the liquid phase content further increasing. Moreover, the homogeneous microstructure and fine NTE are obtained with the threshold value of 25 wt%. Also, the fundamental mechanism of the liquid phase effects during CSP is revealed. This study can guide the further fabrication of the ZrW2O8-containing composites utilizing CSP, especially for the precise control of the liquid phase content. |
| Databáze: | OpenAIRE |
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