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A direct optical method for the study of grain boundary melting
E S Thomson1, J S Wettlaufer, L A Wilen
1Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520, USA. erik.thomson@yale.edu
The Review of Scientific Instruments
|November 10, 2009
Summary
Researchers developed a new method to measure disorder at grain boundaries in materials. This technique uses light reflection and is demonstrated on ice, offering insights into polycrystalline material properties.
Area of Science:
- Materials Science
- Solid State Physics
- Crystallography
Background:
- Grain boundaries significantly influence the properties of polycrystalline materials.
- Understanding disorder at these boundaries is crucial for material development.
- Existing methods for measuring grain boundary disorder have limitations.
Purpose of the Study:
- To develop and demonstrate a novel experimental apparatus and light reflection technique for quantifying disorder at grain boundaries.
- To investigate grain boundaries in optically clear materials under thermodynamic equilibrium.
- To showcase the applicability of the methodology on ice bicrystals.
Main Methods:
- An experimental apparatus was designed for precise control of temperature and impurity concentration.
- A light reflection technique was employed to measure the degree of disorder.
- Crystallographic orientation of ice bicrystals was meticulously measured.
Main Results:
- The study successfully demonstrated the measurement of disorder at grain boundaries in ice bicrystals.
- The technique allows for controlled variations in impurity type and concentration.
- Temperature control near the melting point was achieved.
Conclusions:
- The developed light reflection technique provides a viable method for measuring grain boundary disorder.
- The methodology is adaptable to a broad range of optically clear materials.
- This research contributes to a deeper understanding of polycrystalline material behavior.
