Preparation and properties of aluminium titanate-alumina composites with a corrugated microstructure

被引：0
作者：
Dakskobler A. [1 ]
Kosmač T. [1 ]
机构：
[1] Jožef Stefan Institute, Ljubijana
来源：
Journal of Materials Research | 2006年 / 21卷 / 2期
关键词：
D O I：
10.1557/jmr.2006.0051
中图分类号：
学科分类号：
摘要：
Repeated deformation processing was used to produce layered aluminium titanate (ATI)-alumina composites with a corrugated microstructure. Viscous nonpolar pastes of ATI and alumina powders were prepared using paraffin oil as the dispersing medium. These pastes were rolled into tapes 1 mm thick, which were then stacked together to form starting bi-material laminates in an A-B-A sequence. The laminates were then plastically deformed by repeated folding and rolling at room temperature. After a sufficiently large true plastic deformation, composites with corrugated microstructures were successfully produced. During sintering, part of the ATI decomposed; in the alumina layers large anisotropic grains were formed. The mechanical properties of the sintered composites improved with structural refinement, in spite of extensive microcracking observed during cooling from the sintering temperature. In addition, the thermal expansion coefficient along the rolling direction did not differ from that of the reference material. © 2006 Materials Research Society.
引用
收藏
页码：448 / 454
页数：6
相关论文
共 16 条
  • [1] Thomas H.A.J., Stevens R., Aluminium titanate - A literature review. Part 1: Microcracking phenomena, Brit. Ceram. Trans. J., 88, (1989)
  • [2] Ohya Y., Nakagawa Z., Measurement of crack volume due to thermal expansion anisotropy in aluminium titanate ceramics, J. Mater. Sci., 31, (1996)
  • [3] Lee H.L., Jeong J.Y., Lee H.M., Preparation of Al<sub>2</sub>TiO<sub>5</sub> from alkoxides and the effects of additives on its properties, J. Mater. Sci., 32, (1997)
  • [4] Menon M., Chen I.-W., Bimaterial composites via colloidal rolling techniques: I, Microstructure evolution during rolling, J. Am. Ceram. Soc., 80, (1999)
  • [5] Menon M., Chen I.-W., Bimaterial composites via colloidal rolling techniques: II, Sintering behavior and thermal stresses, J. Am. Ceram. Soc., 80, (1999)
  • [6] Semiatin S.L., Pihler H.R., Formability of sandwich sheet materials in plane straiin compression and rolling, Metall. Trans. A, 10 A, (1979)
  • [7] Winn E.J., Chen I.-W., Deformation processing and properties of Y<sub>2</sub>O<sub>3</sub>-doped ZrO<sub>2</sub>/ porous-Al<sub>2</sub>O<sub>3</sub> composite, Key Eng. Mater., 175-176, (2000)
  • [8] Dakskobler A., Kosmac T., Chen I.-W., Paraffin-based process for producing layered composites with cellular microstructure, J. Am. Ceram. Soc., 85, (2002)
  • [9] Novak S., Dakskobler A., Ribitsch V., The effect of water on the behavior of alumina-paraffin suspension for low-pressure injection moulding (LPIM), J. Eur. Ceram. Soc., 20, (2000)
  • [10] Novak S., Vidovic K., Sajko M., Kosmac T., Surface modification of alumina powder for LPIM, J. Eur. Ceram. Soc., 17, (1997)
12