About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
|
Presentation Title |
F-12: Thermal, Electrical, and Magnetic Properties of Multi-Principal Element Alloys |
Author(s) |
Ravi Kumar, Ugochukwu Ochieze, Bal Krishna Adhikari, Abdulquadri Oriola, Sravya Josyula, Sarah Watzman, Eric Payton |
On-Site Speaker (Planned) |
Ravi Kumar |
Abstract Scope |
Multi-principal element alloys have gained significant attention for their exceptional high-temperature mechanical properties; however, the magnetic, electrical, and thermal characteristics have received less attention. High-throughput CALPHAD predictions are used to select compositions that have predominantly B2 and BCC phases, while maintaining a constant valence electron concentration of 5, to maximize the probability of a high critical transition temperature for superconductivity. Button specimens were prepared by vacuum arc melting. Heat capacity, electrical resistivity, and magnetic susceptibility are investigated as a function of temperature and applied magnetic field using a Quantum Design DynaCool Physical Property Measurement System, while thermal expansion coefficient is characterized by dilatometry. Scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction are used to determine the phases and microstructure. The experimental results are compared with prior published work and interpreted in the context of Matthias’ rules. |