Anisotropic μ-strain and phase separation in entropy-stabilized ultra high-temperature ceramics

Principal Investigator: Frederic Monteverde

Involved personnel: Federico Saraga, Alex Sangiorgi

Starting date: 01/07/2020
Duration: 6 months
Call: Proposal nr. 20200077 – MCX beamline at Elettra – Sincrotrone Trieste S.C.p.A
Project Coordinator: Frederic Monteverde
Consortium: CNR-ISTEC, Materials Science and Engineering Department Missouri Science and Technology University, Elettra – Sincrotrone Trieste S.C.p.A

Entropy stabilized (ES) ultra-high temperature refractory ceramic solid solutions will cover a crucial place in future energy and extreme environment applications. These materials offer unexplored opportunities to tailor new functional properties which strongly depend on their structure and chemical composition. A very few in-depth scientific studies have been conducted on fine structure and µ-strain. This could be one of the first detailed studies of fundamental relationships between µ-strain and composition in ES-UHTCs that will reveal the intrinsic behavior with regard to propensity toward phase separation.

Publications & Patents:

  • F.Monteverde, F. Saraga, M. Gaboardi, Compositional disorder and sintering of entropy stabilized (Hf,Nb,Ta,Ti,Zr)B2 solid solution powders,
  • F.Monteverde, F. Saraga, Entropy stabilized single-phase (Hf,Nb,Ta,Ti,Zr)B2 solid solution powders obtained via carbo/boro-thermal reduction,