Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jallcom.2010.07.069
Title: Tailoring the microstructure of mechanoactivated Al2O 3 and SiO2 mixtures with TiO2 addition
Authors: Zhang, T.S.
Kong, L.B. 
Du, Z.H.
Ma, J.
Li, S.
Keywords: Mechanoactivation
Mullite
Sintering
Titanium dioxide
Whisker
Issue Date: 17-Sep-2010
Citation: Zhang, T.S., Kong, L.B., Du, Z.H., Ma, J., Li, S. (2010-09-17). Tailoring the microstructure of mechanoactivated Al2O 3 and SiO2 mixtures with TiO2 addition. Journal of Alloys and Compounds 506 (2) : 777-783. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jallcom.2010.07.069
Abstract: This paper reports on the effect of TiO2 on mullitization, anisotropic grain growth and densification of Al2O3 and SiO2 mixtures, which are activated by a high-energy ball milling process using tungsten as milling media. High-energy activation significantly promotes mullitization in the mixture of Al2O3 and SiO2 powders, and is a pre-requisite for the occurrence of anisotropic grain growth of mullite. There is a subtle interplay and competition between anisotropic grain growth and densification, depending on the amount of TiO2. Small amount of TiO2 has a positive effect on the phase formation and anisotropic grain growth of mullite, while high concentration of TiO2 suppresses anisotropic grain growth, and thus is beneficial to densification. As a result, the microstructure and densification of the mullite ceramics can be manipulated by the doping levels of TiO2. © 2010 Elsevier B.V. All rights reserved.
Source Title: Journal of Alloys and Compounds
URI: http://scholarbank.nus.edu.sg/handle/10635/111492
ISSN: 09258388
DOI: 10.1016/j.jallcom.2010.07.069
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