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Publication

Atomistic Simulation of Y-Doped alpha-Alumina Interfaces

Paul Bowen, Ulrich Aschauer, Sandra Caroline Galmarini
2008
Journal Articles

Abstract

The exact mechanism of creep resistance enhancement due to yttrium (Y) doping in a-alumina is still subject to speculation, although it is known that dopants segregate strongly to grain boundaries. The current work applies atomistic simulation techniques to the study of segregation to a reasonable number of interfaces in Y-doped a-alumina. Y is shown to segregate stronger to surfaces than grain boundaries and to form ordered structures at the interfaces, which may decrease diffusion coefﬁcients. These Y-ordered regions may act as nucleation sites for YAG precipitates particularly for rapid sintering techniques.

Official source

https://infoscience.epfl.ch/entities/publication/79734301-43fc-4e40-a29c-ebd07459fb2c

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Paul Bowen, Ulrich Aschauer, Sandra Caroline Galmarini
2008
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/79734301-43fc-4e40-a29c-ebd07459fb2c

About this result

Related concepts (29)

Grain boundary

In materials science, a grain boundary is the interface between two grains, or crystallites, in a polycrystalline material. Grain boundaries are two-dimensional defects in the crystal structure, and tend to decrease the electrical and thermal conductivity of the material. Most grain boundaries are preferred sites for the onset of corrosion and for the precipitation of new phases from the solid. They are also important to many of the mechanisms of creep.

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In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine from the human end, while the machine simultaneously feeds back information that aids the operators' decision-making process. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls and process controls.

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