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Updated: Jan 9, 2026
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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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Thermal Stability and Phase Evolution in the Phosphorus-Containing High-Entropy Alloy Fe22Ni16Co19Mn12Cr16P15
Krzysztof Ziewiec1, Marcin Jasiński1, Aneta Ziewiec2
1Institute of Technology, University of the National Education Commission (UKEN), ul. Podchorążych 2, 30-084 Krakow, Poland.
Materials (Basel, Switzerland)
|December 11, 2025
Summary
This study on Fe-Ni-Co-Mn-Cr-P alloy shows good glass-forming ability. Precise cooling control is key to achieving desired amorphous or crystalline states for this advanced material.
Area of Science:
- Materials Science
- Metallurgy
- Solid State Chemistry
Background:
- Advanced alloys are crucial for technological innovation.
- Understanding the glass-forming ability and crystallization behavior of complex multi-component alloys is essential for their application.
- The Fe-Ni-Co-Mn-Cr-P system is explored for its potential in creating materials with enhanced properties.
Purpose of the Study:
- To investigate the glass-forming ability and crystallization characteristics of the Fe22Ni16Co19Mn12Cr16P15 alloy.
- To analyze the phase transformations occurring during cooling and crystallization.
- To correlate microstructural features with thermal properties and cooling rates.
Main Methods:
- Arc melting for alloy synthesis.
- Infrared thermography to detect thermal arrests during crystallization.
- Differential scanning calorimetry (DSC) to quantify transformation enthalpies and crystallization temperatures.
- Scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS) for microstructural and chemical analysis.
- X-ray diffraction (XRD) for phase identification.
Main Results:
- A significant eutectic crystallization event was observed at ~1007 K with a transformation enthalpy of -170.7 J/g.
- Melt-spun ribbons exhibited a broad crystallization interval (ΔTc ≈ 161 K) starting at 659 K and completing around 820 K, indicating enhanced thermal stability.
- SEM/EDS revealed eutectic colonies and chemical partitioning, leading to the precipitation of transition metal phosphides.
- XRD identified four crystalline phases in ingots (Fe-Ni, CrCoP, Ni3P, MnNiP) but confirmed a fully amorphous structure in rapidly cooled ribbons.
Conclusions:
- The Fe22Ni16Co19Mn12Cr16P15 alloy demonstrates good glass-forming ability.
- Slower cooling rates promote the formation of multiple crystalline phosphide phases.
- Controlled cooling is critical for tailoring the alloy's final state, enabling either an amorphous or a specific crystalline microstructure.
Keywords:
DSCFe–Ni–Co–Mn–Cr–P alloySEM/EDSXRDamorphous ribbonseutectic crystallizationhigh-entropy alloysphosphidesthermal stabilityMore Related Videos
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