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Low Temperature Sintering and Deformation of Nanocrystalline TiO2

Published online by Cambridge University Press:  16 February 2011

H. Hahn ,
J. Logas ,
H. J. Höfler ,
P. Kurath  and
R. S. Averback
H. Hahn
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Il 61801, USA
J. Logas
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Il 61801, USA
H. J. Höfler
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Il 61801, USA
P. Kurath
Affiliation:
Mechanical Engineering, University of Illinois, Urbana, Il 61801, USA
R. S. Averback
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, Il 61801, USA
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Abstract

The sintering and deformation kinetics of nanocrystalline (n-) TiO2 were studied. It was found that pressureless sintering yields densities above 95 % with modest increase in grain size whereas pressure assisted sintering (1GPa) results in high density samples without grain growth. In addition compression tests were performed. Large true strains up to 0.6 and strain rates as high as 8 × 10−5 s−1 were observed at 810 °C without fracturing. The sintering and creep results are discussed in terms of the microstructure and diffusion coefficients in n-TiO2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 196: Symposium T – Superplasticity in Metals, Ceramics, and Intermetallics , 1990 , 71
Copyright
Copyright © Materials Research Society 1990

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References

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