@inproceedings{23dd71e5276a48248ff22b86a7c6580d,
title = "Dopant effect on high temperature plasticity in oxide ceramics: Grain boundary chemistry-related phenomena",
abstract = "High temperature plastic deformation in fine-grained oxide ceramics such as alumina and tetragonal zirconia polycrystals is dominantly affected by a small amount of dopant cation. The high-temperature plastic flow in oxide ceramics takes place mainly by grain boundary diffusional creep or grain boundary sliding accommodated by grain boundary diffusion. High-resolution transmission electron microscopy (HRTEM) and an energy-dispersive X-ray spectroscopy (EDS) analysis revealed that the grain boundaries in high-purity oxide ceramics are free from amorphous layer, and that the dopant cations tend to segregate along the grain boundaries. The dopant effect is caused by change in chemical bonding state in the vicinity of the grain boundaries segregated with the dopant cations.",
keywords = "Alumina, Creep, Diffusion, Grain boundary, Molecular orbital calculations, Superplasticity, Tetragonal zirconia polycrystals",
author = "Hidehiro Yoshida and Keijiro Hiraga and Akihide Kuwabara and Takahisa Yamamoto and Yuichi Ikuhara and Taketo Sakuma",
year = "2005",
month = dec,
day = "1",
language = "English",
isbn = "0873396456",
series = "Materials Science and Technology",
pages = "269--276",
booktitle = "Materials Science and Technology 2005 - Proceedings of the Conference",
note = "Materials Science and Technology 2005 Conference ; Conference date: 25-09-2005 Through 28-09-2005",
}