Ultra-high elevated temperature strength of TiB2-based ceramics consolidated by spark plasma sintering
| Autor: | Yoshio Sakka, Hanna Borodianska, Oleg Vasylkiv, Dmytro Demirskyi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Triple point Metallurgy Spark plasma sintering chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound chemistry Flexural strength visual_art 0103 physical sciences Amorphous boron Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic 0210 nano-technology Boron Titanium diboride |
| Zdroj: | Journal of the European Ceramic Society. 37:393-397 |
| ISSN: | 0955-2219 |
| Popis: | Spark plasma sintering of TiB2–boron ceramics using commercially available raw powders is reported. The B4C phase developed during reaction-driven consolidation at 1900 °C. The newly formed grains were located at the grain junctions and the triple point of TiB2 grains, forming a covalent and stiff skeleton of B4C. The flexural strength of the TiB2–10 wt.% boron ceramic composites reached 910 MPa at room temperature and 1105 MPa at 1600 °С. Which is the highest strength reported for non-oxide ceramics at 1600 °C. This was followed by a rapid decrease at 1800 °C to 480–620 MPa, which was confirmed by increased number of cavitated titanium diboride grains observed after flexural strength tests. |
| Databáze: | OpenAIRE |
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