Effects of sintering profile on the densification behaviour of forsterite ceramics

Ramesh, S. and Tan, S.S. and Bang, L.T. and Tan, C.Y. and Purbolaksono, J. and Ramesh, S. and Teng, W.D. (2015) Effects of sintering profile on the densification behaviour of forsterite ceramics. Journal of Ceramic Processing Research, 16 (6). pp. 722-728. ISSN 1229-9162

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Official URL: http://jcpr.kbs-lab.co.kr/file/JCPR_vol.16_2015/JC...

Abstract

The sintering behaviour of forsterite prepared by mechanical activation and heat treatment has been studied. The green compacts were sintered using two different sintering profiles. The first was based on the conventional sintering (CS) profile in which the powder compact was sintered at the desired temperature, holding for 2 hours and then cooled to room temperature. The second was based on a two-step sintering (TSS) profile in which the samples were sintered at a temperature T1 = 1400 degrees C for 6 minutes and then continued sintering at a lower temperature T2 (i.e. 750 degrees C, 850 degrees C and 950 degrees C) for 15 hours before cooling to room temperature. It was found that a minimum ball milling time of 7 h was necessary to completely eliminate secondary phases from developing in the forsterite matrix after sintering at 1400 degrees C. The sintering study indicated that the CS profile was effective in enhancing the fracture toughness of the sintered body when sintered at 1400 degrees C but this was accompanied by exaggerated grain growth. In addition, it was found that sintering below 1400 degrees C was not effective in preventing the formation of secondary phases in the sintered body. On the other hand, the TSS profile (T1 = 1400 degrees C, T2 = 950 degrees C) was found to be most beneficial in promoting densification and more importantly, to suppress grain coarsening of the forsterite body.

Item Type: Article
Uncontrolled Keywords: Forsterite; Sintering; Mechanical properties
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Science > Dept of Physics
Depositing User: Mrs. Siti Mawarni Salim
Date Deposited: 16 Aug 2016 07:32
Last Modified: 31 May 2019 04:31
URI: http://eprints.um.edu.my/id/eprint/16268

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