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Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina

Publication ,  Journal Article
Chi, M; Gu, H; Wang, X; Wang, P
Published in: Journal of the American Ceramic Society
January 1, 2003
Published version (DOI)

A phenomenon of bilevel solubility was observed in a TiO2-doped (2.0 wt%) alumina with bimodal microstructure sintered in N2. Surface contributions to dopant signals in individual grains were identified and removed, using a spatially resolved energy dispersive spectroscopy analysis. Two levels of solubility, 1.005 ± 0.166 and 0.504 ± 0.082 mol% of TiO2 in A12O3, were obtained for anisotropic and equiaxed grains, respectively. No grain size dependence of solubility was found, but segregation of SiO2 to boundaries with the anisotropic grains was observed. This phenomenon was explained by the incorporation of Ti3+ into the A12O3 lattice during the abnormal grain growth caused by SiO2 liquid under a reducing atmosphere.

Duke Scholars

Miaofang Chi
Author Miaofang Chi Thomas Lord Department of Mechanical Engineering and Materia ...

Published In

Journal of the American Ceramic Society

DOI

10.1111/j.1151-2916.2003.tb03587.x

ISSN

0002-7820

Publication Date

January 1, 2003

Volume

86

Issue

11

Start / End Page

1953 / 1955

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Chi, M., Gu, H., Wang, X., & Wang, P. (2003). Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina. Journal of the American Ceramic Society, 86(11), 1953–1955. https://doi.org/10.1111/j.1151-2916.2003.tb03587.x
Chi, M., H. Gu, X. Wang, and P. Wang. “Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina.” Journal of the American Ceramic Society 86, no. 11 (January 1, 2003): 1953–55. https://doi.org/10.1111/j.1151-2916.2003.tb03587.x.
Chi M, Gu H, Wang X, Wang P. Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina. Journal of the American Ceramic Society. 2003 Jan 1;86(11):1953–5.
Chi, M., et al. “Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina.” Journal of the American Ceramic Society, vol. 86, no. 11, Jan. 2003, pp. 1953–55. Scopus, doi:10.1111/j.1151-2916.2003.tb03587.x.
Chi M, Gu H, Wang X, Wang P. Evidence of Bilevel Solubility in the Bimodal Microstructure of TiO 2-Doped Alumina. Journal of the American Ceramic Society. 2003 Jan 1;86(11):1953–1955.
Journal cover image

Published In

Journal of the American Ceramic Society

DOI

10.1111/j.1151-2916.2003.tb03587.x

ISSN

0002-7820

Publication Date

January 1, 2003

Volume

86

Issue

11

Start / End Page

1953 / 1955

Related Subject Headings

  • Materials
  • 4016 Materials engineering
  • 0913 Mechanical Engineering
  • 0912 Materials Engineering