Sintering mechanisms of partially stabilized zirconia (TZ3Y) with ZnO and Co3O4 as sintering additives
| Autor: | V. L. Arantes, R. F. Marcomini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scanning electron microscope Sintering Liquid phase Activation energy Engineering (General). Civil engineering (General) Thermal diffusivity Microstructure Co3O4 Chemical engineering sintering additives Ceramics and Composites ZnO Relative density Cubic zirconia TA1-2040 sintering mechanism zirconia |
| Zdroj: | Cerâmica, Volume: 67, Issue: 382, Pages: 244-249, Published: 17 MAY 2021 Cerâmica, Vol 67, Iss 382, Pp 244-249 (2021) Cerâmica v.67 n.382 2021 Cerâmica (São Paulo. Online) Universidade de São Paulo (USP) instacron:USP |
| Popis: | In this work, the sintering mechanisms of 3 mol% yttria-stabilized zirconia (TZ3Y) and TZ3Y containing 0.3 wt% of ZnO or Co3O4 were analyzed by determining the apparent activation energy of sintering from dilatometry data and observing the evolution of microstructure. Dilatometry test was performed at a heating rate ranging from 5 to 20 °C/min from room temperature up to 1500 °C. The main mechanism of each sintering additive for the studied samples was revealed from the variation of the sintering activation energy as a function of the relative density and scanning electron microscopy images. The mechanism for the ZnO additive was the formation of a liquid phase at the beginning of the sintering process, while the Co3O4 additive acted via solid-state sintering by increasing cation diffusivity. |
| Databáze: | OpenAIRE |
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