Effect of Shear Stress on Viscosity and Crystallization Behavior of CaO-SiO2-Al2O3 Based Mold Fluxes
| Autor: | Guang Hua Wen, Jun Li Guo, Shao Peng Gu, Ping Tang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering 0211 other engineering and technologies Sio2 al2o3 02 engineering and technology 021001 nanoscience & nanotechnology medicine.disease_cause law.invention Viscosity Mechanics of Materials law Mold Shear stress medicine General Materials Science Crystallization Composite material 0210 nano-technology 021102 mining & metallurgy |
| Zdroj: | Key Engineering Materials. 847:87-92 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.847.87 |
| Popis: | The effect of shear stress on the viscosity and crystallization behavior of CaO-SiO2-Al2O3 based mold fluxes were investigated, and the structure evolution of molten slag under shear stress were characterized by magic-angle spinning nuclear magnetic resonance technology (MAS-NMR). The results showed that with an increase of shear stress, the shear-thinning behavior of molten slag was found, and the strongest shear-thinning behavior was formed with an addition of 15% Al2O3. Correspondingly, the decrement of Q3(1Al) and Q2(1Al) species in molten slag were the largest from MAS-NMR results. In addition, under agitation, the crystallization fraction of sample increased from 71% to 88%, and the average grain size was reduced 23%. However, the shear stress has no influence on the crystal phase. |
| Databáze: | OpenAIRE |
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