On the thermal and mechanical properties of Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O across the high-entropy to entropy-stabilized transition
Abstract
As various property studies continue to emerge on high entropy and entropy-stabilized ceramics, we seek a further understanding of the property changes across the phase boundary between “high-entropy” and “entropy-stabilized” phases. The thermal and mechanical properties of bulk ceramic entropy stabilized oxide composition Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O are investigated across this critical transition temperature via the transient plane-source method, temperature-dependent x-ray diffraction, and nano-indentation. The thermal conductivity remains constant within uncertainty across the multi-to-single phase transition at a value of ≈2.5 W/mK, while the linear coefficient of thermal expansion increases nearly 24% from 10.8 to 14.1 × 10−6 K−1. Mechanical softening is also observed across the transition.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 01, 2022
- Source ID
- 10.1063/5.0122775
Entities
People
- Christina M. Rost
- Clifton H. Bumgardner
- Daniel L. Schmuckler
- David R Diercks
- Geoff L. Brennecka
- John Gaskins
- Jon-Paul Maria
- Md Shafkat Bin Hoque
- Patrick E Hopkins
- Xiaodong Li
Organizations
- Colorado School of Mines
- Division of Materials Research
- James Madison University
- Office of Naval Research
- Pennsylvania State University
- University of Virginia