作者：SYU YAMAMOTO;TAKUYA SOGA;TAKAYUKI BAN;

作者单位：Department of Materials Science and Technology, Gifu University 1-1 Yanagido, Gifu-shi, Gifu 501-1193;Department of Materials Science and Technology, Gifu University 1-1 Yanagido, Gifu-shi, Gifu 501-1193;Department of Materials Science and Technology, Gif

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2010-01-05

卷：30

期：3

起页：162

止页：167

分类号：TQ175

语种：英文

关键词：

内容简介

Aluminum titanate ceramics doped with Y_2O_3 and Nb_2O_5 were fired at 1500°C for 2 h. The samples were rather dense, >93% of the theoretical density of aluminum titanate. They also contained grain-boundary cracks with volume of 3 to 6% due to thermal expansion anisotropy of aluminum titanate crystal. The corrosion resistance against molten aluminum alloy at 800 and 1000°C was good and addition of Y_2O_3 was very effective. At the interface of molten aluminum and the titanate ceramics, Al_2MgO_4 and/or MgO interface layer was formed and this layer acted as a protective layer. Addition of Nb_2O_5 accelerates the corrosion especially at 800°C. Co-doping of Y_2O_3 and Nb_2O_5 did not influence the corrosion resistance.