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Fabrication of nanostructure Al2O3/ZrO2 (Y2O3) eutectic by combustion synthesis melt-casting under ultra-high gravity |
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| Authors: | Lin Mei Peilin Mai Kexin Chen |
| Affiliation: | a Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China b Graduated School of the Chinese Academy of Sciences, Beijing 100039, PR China c Department of Physics, Capital Normal University, Beijing 100048, PR China d Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, PR China |
| Abstract: | A novel method for preparing Al2O3/ZrO2 (Y2O3) eutectic was developed by combining combustion synthesis with melt-casting under ultra-high gravity (CSMC-UHG). The application of UHG = 800 g resulted in a high relative density of 99.8%, and an orientation-growth along the UHG direction. The microstructure was composed of aligned growth regimes containing a triangular dispersion of orderly ZrO2 rods in Al2O3 matrix with a spacing of 300 nm. The eutectic had a high fracture toughness up to 17.9 MPa·m1/2, which was mainly attributed to the nanostructure and the elastic bridge effects of the aligned ZrO2 rods. |
| Keywords: | Al2O3/ZrO2 (Y2O3) eutectic Nanostructure Orientation-growth Combustion synthesis Ultra-high gravity |
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