作者：SYU YAMAMOTO;TAKUYA SOGA;TAKAYUKI BAN;
作者單位：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
起頁：162
止頁：167
分類號：TQ175
語種：英文
關(guān)鍵詞：
內(nèi)容簡介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.
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