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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Interface Nucleus Templating of Modular Intermetallic Morphologies: Chemical Pressure Complementarity, Columnar
Rie T Fredrickson1, Daniel C Fredrickson1
1Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States.
Inorganic Chemistry
|October 25, 2025
Summary
Researchers explored complex intermetallic phases using the Interface Nuclear Approach. A new Y-Ag-Zn compound reveals templated architectures driven by chemical pressure relief at interfaces.
Area of Science:
- Solid State Chemistry
- Crystallography
- Materials Science
Background:
- Intermetallic phases exhibit structural diversity through the assembly of simpler structural fragments.
- The Interface Nuclear Approach models modular arrangements driven by chemical pressure (CP) relief at domain interfaces.
Purpose of the Study:
- To synthesize and characterize a new intermetallic compound, Y13Ag42.7Zn29.7.
- To analyze its crystal structure and chemical pressure (CP) relief mechanisms.
Main Methods:
- Synthesis and single-crystal X-ray diffraction of Y13Ag42.7Zn29.7.
- Chemical pressure (CP) analysis.
- Structure determination using the GrowDomain program.
Main Results:
- A hexagonal structure of Y13Ag42.7Zn29.7 was determined, featuring interpenetrating domains of CaPd5+x and EuMg5 types.
- Domains exhibit a hexagonal rod-packing morphology, distinct from previously observed lamellar structures.
- Interface nuclei with strong CP-complementarity were identified at CaPd5+x/EuMg5 interfaces, suggesting templated architectures.
Conclusions:
- The new compound Y13Ag42.7Zn29.7 exemplifies modular intermetallic structures formed by domain intergrowth.
- The findings support the concept of templated architectures in modular intermetallics, governed by chemical pressure relief at interfaces.
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