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- W2024877576 abstract "We systematically investigated the phase transformation and grain-growth behaviors during sintering in 2 and 3 mol% Y 2 O 3 -stabilized tetragonal ZrO 2 (2Y and 3Y) and 8 mol% Y 2 O 3 -stabilized cubic ZrO 2 polycrystals (8Y). In particular, grain-boundary segregation and grain-interior distribution of Y 3+ ions were examined by high-resolution transmission electron microscopy (HRTEM)- and scanning transmission electron microscopy (STEM)-nanoprobe X-ray energy dispersive spectroscopy (EDS) techniques. Above 1200°C, grain growth during sintering in 8Y was much faster than that in 2Y and 3Y. In the grain boundaries in these specimens, amorphous layers did not present; however, Y 3+ ions segregated at the grain boundaries over a width of about 10 nm. The amount of segregated Y 3+ ions in 8Y was significantly less than in 2Y and 3Y. This indicates that the amount of segregated Y 3+ ions is related to grain growth behavior; i.e., an increase in segregated Y 3+ ions retards grain growth. Therefore, grain-growth behavior during sintering can be reasonably explained by the solute-drag mechanism of Y 3+ ions segregating along the grain boundary. In 2Y and 3Y, the cubic-phase regions were formed in grain interiors adjacent to the grain boundaries and/or the multiple junctions in which Y 3+ ions segregated, which can be explained by a grain boundary segregation-induced phase transformation ( GBSIPT ) mechanism." @default.
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- W2024877576 date "2014-06-01" @default.
- W2024877576 modified "2023-10-03" @default.
- W2024877576 title "Grain Boundary Segregation-Induced Phase Transformation and Grain Growth in Y<sub>2</sub>O<sub>3</sub>-Stabilized ZrO<sub>2</sub> Polycrystals" @default.
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- W2024877576 doi "https://doi.org/10.4028/www.scientific.net/kem.616.8" @default.
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