Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887334 | Ceramics International | 2018 | 5 Pages |
Abstract
ZrB2 powders were successfully prepared via carbothermal reduction of ZrO2 with H3BO3 and carbon black under flowing argon. By introducing SiC species into reaction mixtures, the effects of SiC addition on phase composition and morphology of ZrB2 powders thermally treated at different temperatures were investigated. The resultant samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The highly pure ZrB2 with the mean size of 5â¯Âµm could be obtained at 1600â¯Â°C for 90â¯min and the grains presented columnar shapes. After addition of SiC, ZrB2 revealed relatively better crystallinity and finer particle size. Regular columnar ZrB2 grains ranging from 1 to 2â¯Âµm were seen existing after reaction at 1500â¯Â°C for 90â¯min.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Bingying Xie, Li Ma, Dezhi Gao, Xiao Lin, Yu Liu, Yujun Zhang, Hongyu Gong,