Low cost mullite–zirconia composites were prepared from the mixtures of natural bauxite and zirconsand by using transferred arc plasma processing. In this paper, a mixture of natural bauxite and zircon inthe ratio of 7:3 by weight (based on composition of 3:2 mullite) was ball milled for 4 h and melted in thetransferred arc plasma for 2 and 4 min. Argon was used as plasma forming gas. The torch was operated at5 kWinput power. The phase and microstructure formation of melted samples were investigated by XRDand SEM images. The results show that the processing time is a key factor to get a single phase mullite–zirconia composites with required microstructure.
Transferred arc plasma processing of mullite-zirconia composite from natural bauxite and zircon sand / S., Yugeswaran; V., Selvarajan; P., Dhanasekaran; Lusvarghi, Luca. - In: VACUUM. - ISSN 0042-207X. - STAMPA. - 83:2(2008), pp. 353-359. [10.1016/j.vacuum.2008.05.033]