Enhanced performance of Al2O3–SiC–C castables via in-situ formation of multi-reinforced phases by introducing surface treated composite metal powders

Qiulin Xia, Meijie Zhang, Huazhi Gu, Tingting Dong, Haifeng Li, Mweemba Stephen, Chris R. Bowen

Research output: Contribution to journalArticlepeer-review

9 Citations (SciVal)
44 Downloads (Pure)

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 languageEnglish
Pages (from-to)34005-34012
Number of pages8
JournalCeramics International
Volume48
Issue number22
Early online date9 Aug 2022
DOIs
Publication statusPublished - 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 ).

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

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