Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1789540 | Journal of Crystal Growth | 2016 | 8 Pages |
Abstract
Al2O3-YAG-ZrO2 eutectic ceramic plates 10 mm in width, 2.4 mm in thickness and 100 mm in length were directionally grown by micro-pulling down technique under different growth rate (0.1-1 mm/min). The effects of the solidification rate on the crystallographic orientation and microstructure properties were analyzed in considerable detail. The microstructure spacing λ depends on the pulling rate v following the law: λ=7.2vâ12 where λ is in µm and v in µm/s. For low growth rate (v<0.25), the ternary eutectic plates had homogeneous and regular microstructures and higher pulling rate heterogeneity in the morphology corresponding to colonies presence. The annealed plates did not undergo chemical reaction but slight grain growth was observed.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
Omar Benamara, Kheirreddine Lebbou,