High frequency induction heated sintering of nanostructured Al2O3–ZrB2 composite produced by MASHS technique
| Autor: | B. Jamal Abbasi, Mohammad Zakeri, Seyed Ali Tayebifard |
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| Rok vydání: | 2014 |
| Předmět: |
Zirconium diboride
Materials science Process Chemistry and Technology Composite number Metallurgy Self-propagating high-temperature synthesis Sintering Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Fracture toughness chemistry Materials Chemistry Ceramics and Composites Relative density Composite material Ball mill Combustion front |
| Zdroj: | Ceramics International. 40:9217-9224 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2014.01.141 |
| Popis: | Nanostructured Al 2 O 3 –ZrB 2 composite was synthesized using an alternative route called Mechanically Activated Self-propagating High-temperature Synthesis (MASHS). It was demonstrated that Al 2 O 3 –ZrB 2 composite with nanometric structure could be produced via a very fast combustion front in contrast with the SHS process. Ball milling for 5 h with ball to powder weight ratio of 5:1 was found to be the optimum condition for activation of the reactants. Using the high frequency induction heated sintering method, the composite was consolidated within 3 min. The relative density of the sintered sample was 99% of the theoretical density at an applied pressure of 20 MPa and temperature of 1800 °C. The average hardness and fracture toughness were 19.5 GPa and 4.1±0.3 MPa m 1/2 , respectively. |
| Databáze: | OpenAIRE |
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