Synthesis, characterization and use of synthesized fine zirconium diboride as an additive for densification of commercial zirconium diboride powder
| Autor: | William E. Lee, Niranjan Patra, Daniel Doni Jayaseelan, Nasrin Al Nasiri |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Zirconium diboride Zirconium Materials science Process Chemistry and Technology Metallurgy chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Characterization (materials science) Boric acid chemistry.chemical_compound chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites Zirconyl chloride Cost benefit 0210 nano-technology Boron Carbon Nuclear chemistry |
| Zdroj: | Ceramics International. 42:9565-9570 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.03.037 |
| Popis: | Zirconium diboride (ZrB 2 ) was synthesized by a solution-based technique using zirconyl chloride (ZrOCl 2 ·8H 2 O, ZOO), boric acid (H 3 BO 3 , BA) and gum karaya (GK) as the sources of zirconium, boron and carbon, respectively. The initial formation temperature of ZrB 2 was 1200 °C and complete conversion was achieved by 1400 °C. Preceramic precursors and as-synthesized ZrB 2 powders were characterized by XRD, TG-DTA, SEM, TEM, EDX and compared with commercial ZrB 2 powder made by carbothermic reduction. FT-IR of as-synthesized dried preceramic precursor revealed the formation of Zr–O–C and Zr–O–B whereas SEM showed agglomerated spherical particles with mean diameter of 2 and as-synthesized fine ZrB 2 powder were spark plasma sintered (SPS) at 1900 °C for 10 min. Addition of 10 wt% of synthesized fine powder improved the fired density from 87% to 93% of theoretical. A significant cost benefit arises for the utilization of cheap synthesized fine powder as an additive for the densification of the more expensive commercial powder. |
| Databáze: | OpenAIRE |
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