Toughness control of boron carbide obtained by spark plasma sintering in nitrogen atmosphere
| Autor: | Yoshio Sakka, Ting Zhao, Dmytro Demirskyi, Alfred Iing Yoong Tok, Petre Badica, Peifeng Li, Shumao Xie, Oleg Vasylkiv, Hanna Borodianska |
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| Rok vydání: | 2014 |
| Předmět: |
Toughness
Materials science Process Chemistry and Technology Spark plasma sintering Sintering chemistry.chemical_element Boron carbide Nitrogen Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Deflection (engineering) visual_art Indentation Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material |
| Zdroj: | Ceramics International. 40:3053-3061 |
| ISSN: | 0272-8842 |
| Popis: | Boron carbide ceramic was prepared by reactive Spark Plasma Sintering under N2-atmosphere and for different heating times and maximum pressure regimes. Split-Hopkinson Pressure Bar (SHPB), indentation, XRD and microscopy measurements were performed for samples characterization. It is shown that SHPB toughness control depending on SPS regime is possible and the main reason is introduction of nitrogen into B4C ceramic. Complex relationships between processing conditions, sintering mechanism, material's specifics, static and dynamic mechanical properties are discussed. Improvement of dynamic toughness is through mechanisms resembling those working for static load conditions such as cracks deflection and pull out, but there are also significant differences. |
| Databáze: | OpenAIRE |
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