Home Technology Initial stage of bi-modal microstructure in TiO2-doped α-Al2O3 ceramics induced by SiO2 impurity
Article
Licensed
Unlicensed Requires Authentication

Initial stage of bi-modal microstructure in TiO2-doped α-Al2O3 ceramics induced by SiO2 impurity

  • Pengxiang Qian , Hui Gu and Fritz Aldinger
Published/Copyright: June 11, 2013
Become an author with De Gruyter Brill
Submit Manuscript Author Information
International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 3

Abstract

Uni-modal and bi-modal microstructures were concurrently observed in a TiO2-doped -Al2O3 ceramic material with some SiO2 impurity. The segregation of Ti and Si to grain boundaries was systematically evaluated to reveal their role at the start of anisotropic grain growth. In general, in the bi-modal area grain boundaries exhibit higher Si excess than those in the uni-modal area. However, the basal plane of anisotropic grains was always found to contain more segregated Si while the non-basal planes were found to contain less Si. Such enrichment of SiO2 was also found at the basal planes of equiaxed grains in the uni-modal area, which occurred in the initial stage of anisotropic grain growth. Before and after this stage, the grain boundary composition was relatively uniform with the mole ratio of SiO2 to TiO2 as 2.3: 1 and 5.8: 1, respectively. The latter should be related to the composition of eutectic liquid formed during the sintering, which is responsible for the development of the bi-modal microstructure.

Keywords: α-Al2O3; Microstructure; Anisotropic grain growth; Grain boundary segregation
* Correspondence address, Prof. Hui Gu, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding-xi Rd., Shanghai 200050, China, Tel.: +21 524 12 318, Fax: +21 524 13 122, E-mail:

References

[1] S.I.Bae, S.Baik: J. Mater. Sci.28 (1993) 4197.10.1007/BF00351254Search in Google Scholar

[2] H.Song, R.L.Coble: J. Am. Ceram. Soc.73 (1990) 2077.10.1111/j.1151-2916.1990.tb05271.xSearch in Google Scholar

[3] J.Rödel, A.M.Glaeser: J. Am. Ceram. Soc.73 (1990) 3292.10.1111/j.1151-2916.1990.tb06452.xSearch in Google Scholar

[4] S.I.Bae, S.Baik: J. Am. Ceram. Soc.76 (1993) 1065.10.1111/j.1151-2916.1993.tb05338.xSearch in Google Scholar

[5] D.S.Horn, G.L.Messing: Mat. Sci. Eng. A195 (1995) 169.10.1016/0921-5093(94)06516-0Search in Google Scholar

[6] Y.M.Kim, S.H.Hong, D.Y.Kim: J. Am. Ceram. Soc.83 (2000) 2809.10.1111/j.1151-2916.2000.tb01636.xSearch in Google Scholar

[7] A.Kebbede, J.Parai, A.H.Carim: J. Am. Ceram. Soc.83 (2000) 2845.10.1111/j.1151-2916.2000.tb01642.xSearch in Google Scholar

[8] C.W.Park, D.Y.Yoon: J. Am. Ceram. Soc.83 (2000) 2605.10.1111/j.1151-2916.2000.tb01596.xSearch in Google Scholar

[9] I.MacLaren, R.M.Cannon, M.A.Gülgün, M.Rühle: J. Am. Ceram. Soc.86 (2003) 650.10.1111/j.1151-2916.2003.tb03354.xSearch in Google Scholar

[10] C.M.Wang, H.M.Chan, M.P.Harmer: J. Am. Ceram. Soc.87 (2004) 378.10.1111/j.1551-2916.2004.00378.xSearch in Google Scholar

[11] A.Kebbede, G.L.Messing, A.H.Carim: J. Am. Ceram. Soc.80 (1997) 2814.10.1111/j.1151-2916.1997.tb03198.xSearch in Google Scholar

[12] J.Tartaj, G.L.Messing: J. Eur. Ceram. Soc.17 (1997) 719.10.1016/S0955-2219(96)00091-XSearch in Google Scholar

[13] A.Kebbede, A.H.Carim: Mater. Lett.41 (1999) 198.10.1016/S0167-577X(99)00130-5Search in Google Scholar

[14] O.S.Kwon, S.H.Hong, J.H.Lee, U.J.Chung, D.Y.Kim, N.M.Hwang: Acta Mater.50 (2002) 486.10.1016/S1359-6454(02)00355-5Search in Google Scholar

[15] M.Chi, H.Gu: Interface Sci.12 (2004) 335.10.1023/B:INTS.0000028663.24520.bcSearch in Google Scholar

[16] M.Chi, H.Gu, P.Qian, X.Wang, P.Wang: Z. Metallkd.96 (2005) 486.Search in Google Scholar

[17] M.Chi, H.Gu, X.Wang, P.Wang: J. Am. Ceram. Soc.86 (2003) 1953.10.1111/j.1151-2916.2003.tb03587.xSearch in Google Scholar

[18] H.Gu, F.Wakai: J. Mater. Synth. Process.6 (1998) 393.10.1023/A:1021876805121Search in Google Scholar

[19] H.Gu: Ultramicroscopy76 (1999) 173.10.1016/S0304-3991(99)00003-0Search in Google Scholar

[20] Y.M.Agamawi, J.White: Trans. Brit. Ceram. Soc.51 (1951) 293.Search in Google Scholar

Received: 2007-4-3
Accepted: 2007-12-21
Published Online: 2013-06-11
Published in Print: 2008-03-01

© 2008, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Christoph Schwink 80 years
  5. Basic
  6. Initial stage of bi-modal microstructure in TiO2-doped α-Al2O3 ceramics induced by SiO2 impurity
  7. Statistical thermodynamic approach to molten Fe–Cr–P
  8. Phase diagram of the iron-rich portion in the iron–gallium–aluminum ternary system
  9. Isothermal section at 773 K of the Gd–Er–Co ternary system
  10. Thermophysical properties of Nd-, Er-, YNi-alloys
  11. Influence of carbides and of the dendritic orientation on the thermal expansion of Ni-base, Co-base and Fe-base simple cast alloys
  12. Influence of previous ageing treatments on the strength of an Al-4.3 wt.% Mg-1.2 wt.% Cu alloy processed by ECAE
  13. Applied
  14. Formation and microstructure of (Ti, V)C-reinforced iron-matrix composites using self-propagating high-temperature synthesis
  15. Effect of Cr and V on phase equilibria in Co–WC based hardmetals
  16. Thermodynamic modeling of the Cu–Se system
  17. Phase transition in the Fe–V system
  18. Microstructural changes at the ultra-precision machined surface of Zn–Al based alloy
  19. Study of structural and electrical properties of arsenic ferrites
  20. Study of thin film structure based on MgF2, CeO2 and Al2O3 layers for optical applications
  21. Notifications
  22. DGM News
https://doi.org/10.3139/146.101642
Keywords for this article
α-Al2O3; Microstructure; Anisotropic grain growth; Grain boundary segregation

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Christoph Schwink 80 years
  5. Basic
  6. Initial stage of bi-modal microstructure in TiO2-doped α-Al2O3 ceramics induced by SiO2 impurity
  7. Statistical thermodynamic approach to molten Fe–Cr–P
  8. Phase diagram of the iron-rich portion in the iron–gallium–aluminum ternary system
  9. Isothermal section at 773 K of the Gd–Er–Co ternary system
  10. Thermophysical properties of Nd-, Er-, YNi-alloys
  11. Influence of carbides and of the dendritic orientation on the thermal expansion of Ni-base, Co-base and Fe-base simple cast alloys
  12. Influence of previous ageing treatments on the strength of an Al-4.3 wt.% Mg-1.2 wt.% Cu alloy processed by ECAE
  13. Applied
  14. Formation and microstructure of (Ti, V)C-reinforced iron-matrix composites using self-propagating high-temperature synthesis
  15. Effect of Cr and V on phase equilibria in Co–WC based hardmetals
  16. Thermodynamic modeling of the Cu–Se system
  17. Phase transition in the Fe–V system
  18. Microstructural changes at the ultra-precision machined surface of Zn–Al based alloy
  19. Study of structural and electrical properties of arsenic ferrites
  20. Study of thin film structure based on MgF2, CeO2 and Al2O3 layers for optical applications
  21. Notifications
  22. DGM News
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2026 De Gruyter Brill
Downloaded on 1.2.2026 from https://www.degruyterbrill.com/document/doi/10.3139/146.101642/html
Scroll to top button