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Atom Probe Tomography Studies on the CuIn,GaSe2 Grain Boundaries
Published on: April 22, 2013
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Basic concepts of grain-boundary structure and phase behavior: From theory and experiments to material properties
1Department of Materials Science and Engineering, University of California, Irvine, Irvine, USA.
MRS Bulletin
|March 9, 2026
Summary
Defect phase transformations significantly impact material properties. Understanding and controlling these defect phases offer new avenues for tailoring material performance.
Area of Science:
- Materials Science and Engineering
- Thermodynamics of Defects
- Phase Transformations
Background:
- Structure-processing-properties-performance relationships are central to materials science.
- Material imperfections, such as dislocations and grain boundaries, influence properties.
- The thermodynamic phases of defects are less understood compared to their impact on properties.
Purpose of the Study:
- To explain the thermodynamic fundamentals of grain boundary phase transformations.
- To discuss experimental and theoretical tools for uncovering defect phases and property changes.
- To explore novel findings on phase transformations in other defects, like dislocations.
Main Methods:
- Review of thermodynamic fundamentals related to defect phases.
- Discussion of experimental techniques (e.g., TEM) and theoretical/computational tools (e.g., atomistic simulations).
- Application of these tools to various material systems.
Main Results:
- Emerging appreciation for phase transformations occurring at surfaces and grain boundaries.
- Demonstrated impact of defect phase transformations on material properties (e.g., grain growth, conductivity, strength, thermal transport).
- Significant influence of defect phases on the overall properties of bulk materials.
Conclusions:
- Control over material properties can be achieved by tailoring defect distributions and their thermodynamic phase states.
- Ongoing theoretical, computational, and experimental efforts are crucial for understanding and controlling defect phase behavior.
- Defect phase transformations present a promising frontier for advanced materials design and performance enhancement.
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