Sintered TiO2 powder containing metallic Co binder prepared via mechanical carbonization, and its mechanical properties
| Autor: | Jeshin Park, Il-Song Park, Seungkyun Yim |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbonization Process Chemistry and Technology Composite number Alloy Sintering 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Fracture toughness Flexural strength Transmission electron microscopy Vickers hardness test Materials Chemistry Ceramics and Composites engineering Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 44:14044-14052 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.05.001 |
| Popis: | A TiO 2 -Co-a composite powder was prepared via carbonizing and selective oxidation processing of a Ti-Co alloy. The conventionally mixed TiO 2 -Co-c composite powder and pure TiO 2 were sintered at 1100, 1200, 1300, 1400 °C, respectively. The structural characterization was performed using X-ray diffraction, field emission scattering electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The sintered samples were more densified, and melted bonding occurred at temperature higher than 1300 °C. The flexural strength and fracture toughness of the TiO 2 -Co-a sample were higher than those of the TiO 2 and TiO 2 -Co-c sintered at temperature higher than 1300 °C, while the Vickers hardness of TiO 2 -Co-a was the lowest at all sintering temperatures. The sintered TiO 2 -Co-a sample was more ductile and strengthened than the TiO 2 -Co-c sample with added metallic Co binder via mechanical mixing. The enhanced mechanical properties of the TiO 2 -Co-a sample were due to the fine dispersion of the metallic Co binder wetted with a TiO 2 matrix. |
| Databáze: | OpenAIRE |
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