Hostname: page-component-84b7d79bbc-lrf7s Total loading time: 0 Render date: 2024-07-29T20:20:25.123Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  01 February 2006

Aleš Dakskobler  and
Tomaž Kosmač
Aleš Dakskobler*
Affiliation:
Jožef Stefan Institute, Jamova 39, Ljubijana, Slovenia
Tomaž Kosmač
Affiliation:
Jožef Stefan Institute, Jamova 39, Ljubijana, Slovenia
*
a)Address all correspondence to this author. e-mail: ales.dakskobler@ijs.si
Get access

Abstract

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.

Keywords

CeramicCompositeLayered
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 2 , February 2006 , pp. 448 - 454
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Thomas, H.A.J. and Stevens, R.: Aluminium titanate—A literature review. Part 1: Microcracking phenomena. Brit. Ceram. Trans. J. 88, 144 (1989).Google Scholar
2.Ohya, Y. and Nakagawa, Z.: Measurement of crack volume due to thermal expansion anisotropy in aluminium titanate ceramics. J. Mater. Sci. 31, 1555 (1996).CrossRefGoogle Scholar
3.Lee, H.L., Jeong, J.Y. and Lee, H.M.: Preparation of Al2TiO5 from alkoxides and the effects of additives on its properties. J. Mater. Sci. 32, 5687 (1997).CrossRefGoogle Scholar
4.Menon, M. and Chen, I-W.: Bimaterial composites via colloidal rolling techniques: I, Microstructure evolution during rolling. J. Am. Ceram. Soc. 80, 2814 (1999).Google Scholar
5.Menon, M. and Chen, I-W.: Bimaterial composites via colloidal rolling techniques: II, Sintering behavior and thermal stresses. J. Am. Ceram. Soc. 80, 2822 (1999).Google Scholar
6.Semiatin, S.L. and Pihler, H.R.: Formability of sandwich sheet materials in plane straiin compression and rolling. Metall. Trans. A 10A, 79 (1979).Google Scholar
7.Winn, E.J. and Chen, I-W.: Deformation processing and properties of Y2O3-doped ZrO2/porous-Al2O3 composite. Key Eng. Mater. 175–176, 163 (2000).Google Scholar
8.Dakskobler, A., Kosmač, T. and Chen, I-W.: Paraffin-based process for producing layered composites with cellular microstructure. J. Am. Ceram. Soc. 85, 1013 (2002).CrossRefGoogle Scholar
9.Novak, S., Dakskobler, A. and Ribitsch, V.: The effect of water on the behavior of alumina-paraffin suspension for low-pressure injection moulding (LPIM). J. Eur. Ceram. Soc. 20, 2175 (2000).CrossRefGoogle Scholar
10.Novak, S., Vidović, K., Sajko, M. and Kosmač, T.: Surface modification of alumina powder for LPIM. J. Eur. Ceram. Soc. 17, 217 (1997).CrossRefGoogle Scholar
11.Sawada, H.: Residual electron-density study of alpha-aluminum oxide through refinement of experimental atomic scattering factors. Mater. Res. Bull. 29, 127 (1994).CrossRefGoogle Scholar
12.Coffey, C.E. Holcombe Jr.and A.L. Jr.: Calculated x-ray powder diffraction data for beta Al2TiO5. J. Am. Ceram. Soc. 56, 220 (1973).Google Scholar
13.Thomas, H.A.J. and Stevens, R.: Aluminium titanate—A literature review. Part 2: Engineering properties and thermal stability. Brit. Ceram. Trans. J. 88, 184 (1989).Google Scholar
14.Kebbede, A., Messing, G.L. and Carim, A.H.: Grain boundaries in titania-doped alpha-alumina with anisotropic microstructure. J. Am. Ceram. Soc. 80, 2814 (1997).CrossRefGoogle Scholar
15.Kim, Y.M., Hong, S.H. and Kim, D.Y.: Anisotropic abnormal grain growth in TiO2/SiO2-doped alumina. J. Am. Ceram. Soc. 83, 2809 (2000).CrossRefGoogle Scholar
16.Dakskobler, A. and Kosmač, T.: The preparation and properties of Al2O3–ZrO2 composites with corrugated microstructure. J. Eur. Ceram. Soc. 24, 3351 (2004).CrossRefGoogle Scholar