Back to Search
Start Over
Effect of SiC addition on the formation of ZrB2 through reaction of ZrO2, boric acid (H3BO3) and carbon black.
- Source :
-
Ceramics International . Dec2017, Vol. 43 Issue 18, p16457-16461. 5p. - Publication Year :
- 2017
-
Abstract
- ZrB 2 -SiC powders with different amounts of SiC (10–30 wt%) were in-situ synthesized at 1600 °C for 90 min in Ar atmosphere. Effects of SiC addition on the formation of ZrB 2 via carbothermal reduction of ZrO 2 , H 3 BO 3 and carbon black were investigated. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and transmission electron microscope (TEM). The grain size of ZrB 2 in final powders decreased with adding SiC. Columnar ZrB 2 and granular SiC were combined interactively when the SiC content was 25 wt%. Layer-like hexagonal SiC was obtained in the product containing 30 wt% SiC, whereas the ZrB 2 grain growth was strongly inhibited. Furthermore, the growth mechanisms of ZrB 2 and SiC were studied. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SILICON carbide
*CHEMICAL reactions
*ZIRCONIUM oxide
*BORIC acid
*CARBON-black
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 43
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 125706377
- Full Text :
- https://doi.org/10.1016/j.ceramint.2017.09.026