期刊
CERAMICS INTERNATIONAL
卷 28, 期 4, 页码 447-450出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0272-8842(01)00117-1
关键词
composites; mullite; ZrO2; TiO2
Mullite-zirconia composite materials were prepared by reaction sintering of alpha-alumina and aluminium nitrate as alumina sources, and zircon powder. Different effects were observed on sintering, densification and microstructure of composites prepared by various alumina sources by adding TiO2. The formation temperature and retention of tetragonal zirconia phase were found to differ in composites with and without TiO2. The more fraction of t-ZrO2 was retained from the reaction sintering of alumina nitrate and zircon without TiO2 addition. The same trend was observed for the combination of alpha-alumina and zircon containing 3.5 wt.% TiO2 below 1550 degreesC. The microstructural analysis show enlarge ZrO2 particles in compositions containing TiO2; that is the reason for the reduction of t-ZrO2 concentration. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.
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