Sentences with phrase «at grain boundaries»

«We found that the magnetic anisotropy energy suddenly transitions at the grain boundaries.

They observed abrupt changes in magnetic properties at the grain boundaries.

The formation of such ordered superstructures and the associated interfacial reconstructions that change the 2 - D translational symmetries at both terminating grain planes, which had been thought impossible to be realized at general grain boundaries that should be lacking a long - range translational symmetry according to the classical theories in physical metallurgy, are enabled by faceting, as well as the formation of atomic - level steps at the grain boundaries.

But researchers showed that it is enabled by faceting, as well as the formation of atomic - level steps at the grain boundaries, which allows separate interfacial reconstructions to occur at both terminating grain surface planes in a unique «bilayer» interfacial phase (wherein an «interfacial phase» refers to a thermodynamically 2 - D phase spontaneously - formed at an interface, which is also called a «complexion»).

Not exact matches

«Segregation - induced ordered superstructures at general grain boundaries in a Ni - Bi alloy: The discovery of ordered, segregation - induced superstructures at general grain boundaries challenges a traditional view in physical metallurgy.»

This somewhat surprising discovery enriches our fundamental knowledge of the atomic - level segregation structures at general grain boundaries, which are important in controlling a broad range of mechanical and physical properties of polycrystalline alloys.

This discovery shows that segregation - induced ordered superstructures are not limited to special grain boundaries that are inherently periodic, but may exist at a variety of general grain boundaries that were thought to be lacking any long - range order; hence, they can affect the performance of polycrystalline engineering alloys.

Specifically, it was unclear whether the segregated bismuth atoms can form reconstructed superstructures, the existence of which was not expected at the general grain boundaries, but have been revealed in this new study.

Atomistic models and atomic - resolution STEM HAADF (scanning transmission electron microscopic high - angle annular dark - field) images showing three examples of segregation - induced superstructures observed at randomly - selected general grain boundaries of a nickel - bismuth (Ni - Bi) polycrystalline alloy.

Bulk defects in a metal, such as grain boundaries, can create regions of increased strain at its surface that could affect its catalytic activity.

By annealing the films to create larger grains, they could change the types and distribution of grain boundaries at the surface.

Crystalline metals often have weaknesses at the boundaries between crystal grains.

A theoretical chemistry group at UIC, led by Petr Kral, was able to explain this attraction and additional electronic properties of the grain boundary.

To fully examine intergranular oxidation rates, they noted that the transport processes along the grain boundary and reactions at the oxidation front had to be considered.