Morphology and mechanism study for the synthesis of ZrB{sub 2}–SiC powders by different methods
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191 (China)
- Aerospace Research Institute of Materials and Processing Technology, No. 1 Nan Da Hong Men Road, Fengtai District, Beijing 100076 (China)
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan)
ZrB{sub 2}–SiC ceramics, whose SiC is generally incorporated into the system by mechanical mixing, are known to have better performance than monolithic ZrB{sub 2}. Therefore, synthesis of duplex ZrB{sub 2}–SiC powders is beneficial for improving sinterability and mechanical properties of ZrB{sub 2}–SiC composites. In the present work, ZrB{sub 2}–SiC duplex powders with different morphologies were synthesized at 1550 °C for 2 h using as-synthesized amorphous hydrous ZrO{sub 2}–SiO{sub 2}. Both precipitation and sol–gel methods were used to prepare ZrO{sub 2}–SiO{sub 2} precursors. ZrB{sub 2}–SiC powder derived from precipitation method presented a rod-like morphology with smaller irregular particles adhering to them. And the morphology from sol–gel method was equiaxed shape with a very uniform distribution for principal components of Zr and Si. - Graphical abstract: SEM images of the ZrB2-SiC powders obtained by different methods. Display Omitted - Highlights: • ZrB{sub 2}–SiC powders with different morphologies were synthesized. • Precipitation and sol–gel methods were used to prepare ZrO{sub 2}–SiO{sub 2} precursors. • Possible mechanisms of morphology formation were investigated. • This work provided a potential way of morphology control for raw powders. • The synthesized duplex powders achieved a uniform distribution of SiC in ZrB{sub 2}.
- OSTI ID:
- 22274138
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 207; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reactive sintering of tungsten-doped high strength ZrB{sub 2}–SiC porous ceramics using metastable precursors
Mechanical properties of fusion welded ceramics in the $\mathrm{SiC-ZrB}$2 and $\mathrm{SiC-ZrB}$2-$\mathrm{ZrC}$ systems