Critical stress map for ZrO2 tetragonal to monoclinic phase transformation in ZrO2-toughened glass-ceramics
| Autor: | Jason Thomas Harris, Jian Luo, Charlene M. Smith, Binghui Deng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Toughened glass Fracture mechanics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Tetragonal crystal system Compressive strength Shear (geology) visual_art 0103 physical sciences Ultimate tensile strength visual_art.visual_art_medium General Materials Science Ceramic Composite material 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Materialia. 9:100548 |
| ISSN: | 2589-1529 |
| Popis: | Inspired by recent observation of compressive stress induced tetragonal to monoclinic (t-m) phase transformation in yttria-stabilized zirconia, we conduct a systematic study to investigate the critical stress map for ZrO2 transformation under various loading conditions. The results show that (1) uniaxial tensile and compressive loadings can trigger the transformation, but not hydrostatic tensile and compressive loadings; (2) shear and equal biaxial tensile loading are most favored to trigger the transformation. Additionally, simulation on a model ZrO2-containing SiO2-based glass-ceramic shows that the stress fields around the running crack front can help triggering ZrO2 phase transformation, and consequently change the stress in ZrO2 from tensile to compressive and deflect the crack propagation. The insights obtained from these simulations can help us better understand ZrO2 transformation toughening mechanism, and further leverage it to enhance the mechanical performance of materials in many real applications. |
| Databáze: | OpenAIRE |
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