Abstract
Al2O3–SiC–C (ASC) castables were prepared with bauxite and silicon carbide as major raw materials and introducing large amount of surface treated composite metal powders (STCMPs) as antioxidant. Their comprehensive properties were greatly improved attributed to the in situ formation of multi-reinforced phases including carbide silicon whiskers and mullite fibers in the matrix. Compared with the corresponding samples without STCMPs, the high temperature modulus of rupture of those with 6 wt% STCMPs calcined in air increased by 47.3% and with 8 wt% STCMPs calcined in reducing atmosphere increased by 220%. The retained CMOR ratio of the sample with 6 wt% STCMPs calcined in reducing atmosphere was high up to 50% after 5 cycles thermal shocks. Moreover, the oxidation index and slag erosion index of samples with 6 wt% STCMPs were decreased by 45% and 74%. This work provides a new perspective for the preparation of ASC castables with excellent high-temperature performance.
Original language | English |
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Pages (from-to) | 34005-34012 |
Number of pages | 8 |
Journal | Ceramics International |
Volume | 48 |
Issue number | 22 |
Early online date | 9 Aug 2022 |
DOIs | |
Publication status | Published - 15 Nov 2022 |
Bibliographical note
Funding Information:The authors appreciate the financial support from the National Natural Science Foundation of China (Grant No. 52072276 ) and the Foundation of Huzhou Municipal Science and Technology Bureau , Zhejiang Province (Grant No. 2020ZD2016 ).
Funding
The authors appreciate the financial support from the National Natural Science Foundation of China (Grant No. 52072276 ) and the Foundation of Huzhou Municipal Science and Technology Bureau , Zhejiang Province (Grant No. 2020ZD2016 ).
Keywords
- AlO–SiC–C castables
- In suit formation
- Multi-reinforced phases
- Surface treated composite metal powders
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry