Fracture resistance of yttria stabilized zirconia manufactured from stabilizer-coated nanopowder by micro cantilever bending tests
| Autor: | Chandra Macauley, Matthias Göken, Sven Giese, Frank Kern, Steffen Neumeier |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Toughness Materials science Cantilever 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Focused ion beam Tetragonal crystal system Phase (matter) 0103 physical sciences Materials Chemistry Ceramics and Composites Fracture (geology) Cubic zirconia Composite material 0210 nano-technology Yttria-stabilized zirconia |
| Zdroj: | Journal of the European Ceramic Society. 39:3830-3836 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2019.05.006 |
| Popis: | Yttria stabilized tetragonal zirconia polycrystal (Y-TZP) owes its high toughness to transformation toughening, a mechanism that requires the development of a process zone. It is important to measure if and to what extent the size of components can be reduced. In this study, tests were carried out using focused ion beam or picosecond milled pre-notched, 3 mol percent Y2O3 (3Y-) TZP micro-cantilever (10–250 μm) beams. The tests show clearly that the maximum fracture resistance is size dependent and the plateau toughness was not reached in any of the small-scale samples. A correlation between transformability of the tetragonal phase and the measured fracture resistance became visible only for the largest micro cantilever but did not reach the values measured in macroscopic samples. Based on these results, it is not advantageous to use very tough zirconia materials in components with dimensions smaller than ∼0.25 mm, as the high toughness is not fully realized. |
| Databáze: | OpenAIRE |
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