Journal
VACUUM
Volume 83, Issue 2, Pages 353-359Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2008.05.033
Keywords
Zircon; Bauxite ore; Mullite; Composite; Arc plasma; X-ray techniques
Funding
- Department of Science and Technology Government of India
- Department of Science and Technology, Government of India
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Low cost mullite-zirconia composites were prepared from the mixtures of natural bauxite and zircon sand by using transferred arc plasma processing. In this paper, a mixture of natural bauxite and zircon in the ratio of 7:3 by weight (based on composition of 3:2 mullite) was ball milled for 4 h and melted in the transferred arc plasma for 2 and 4 min. Argon was used as plasma forming gas. The torch was operated at 5 kW input power. The phase and microstructure formation of melted samples were investigated by XRD and SEM images. The results show that the processing time is a key factor to get a single phase mullitezirconia composites with required microstructure. (C) 2008 Elsevier Ltd. All rights reserved.
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