Logo RUB
  • Institute
    • ICAMS
      • Mission
      • Structure
      • Members
      • Fellows
    • Departments & Research Groups
      • Atomistic Modelling and Simulation
      • Scale-Bridging Thermodynamic and Kinetic Simulation
      • Micromechanical and Macroscopic Modelling
      • Artificial Intelligence for Integrated Material Science
      • Computational Design of Functional Interfaces
      • Scale-Bridging Simulation of Functional Composites
      • Materials Informatics and Data Science
      • High-Performance Computing in Materials Science
    • Central Services
      • Coordination Office
      • IT
  • Research
    • Overview
    • Publications
    • Software and Data
    • Collaborative research
    • Research networks
    • Young enterprises
  • Teaching
    • Overview
    • Materialwissenschaft B.Sc.
    • Materials Science and Simulation M.Sc.
    • ICAMS Graduate School
    • Student Projects
  • News & Events
    • Overview
    • News
    • Seminars and Workshops
    • Conferences
  • Services
    • Overview
    • Contact
    • Open positions
    • Travel information
 
ICAMS
ICAMS
MENÜ
  • RUB-STARTSEITE
  • Institute
    • ICAMS
    • Departments & Research Groups
    • Central Services
  • Research
    • Overview
    • Publications
    • Software and Data
    • Collaborative research
    • Research networks
    • Young enterprises
  • Teaching
    • Overview
    • Materialwissenschaft B.Sc.
    • Materials Science and Simulation M.Sc.
    • ICAMS Graduate School
    • Student Projects
  • News & Events
    • Overview
    • News
    • Seminars and Workshops
    • Conferences
  • Services
    • Overview
    • Contact
    • Open positions
    • Travel information

Just another WordPress site - Ruhr-Universität Bochum

Phenomenon of ultra-fast tracer diffusion of Co in HCP high entropy alloys

M. Vaidya, S. Sen, X. Zhang, L. Frommeyer, Ł. Rogal, S. Sankaran, B. Grabowski, G. Wilde, S. Divinski

Acta Materialia, 196, 220-230, (2020)

DOI: 10.1016/j.actamat.2020.06.025

Download: BibTEX

An experimental-ab initio approach is applied to investigate solute diffusion in hexagonal high-entropy alloys. The radioisotope 57Co is selected to probe the diffusion behaviour in a series of HCP alloys, from equiatomic binary (HfZr) and ternary (HfTiZr) to quinary Al5Sc20Hf25Ti25Zr25 at.% and Al15Sc10Hf25Ti25Zr25 at.% high-entropy alloys. Diffusion of Co in the present alloys is found to be strongly anisotropic and exceptionally fast (by 5 to 10 orders of magnitude faster than self-diffusion) which can be explained in terms of a dissociative diffusion mechanism. The origin of ultra-fast diffusion of Co in the given HCP high-entropy alloys and the impact of the multi-element environment on the interstitial positions are analyzed in the framework of ab initio computations. Our results show that solute diffusion can be used as a tool to probe potential short range order in HCP multi-principal element alloys on very short time scales with respect to the jump rates of matrix atoms.

back
{"type":"article", "name":"m.vaidya20209", "author":"M. Vaidya and S. Sen and X. Zhang and L. Frommeyer and Ł. Rogal and S. Sankaran and B. Grabowski and G. Wilde and S. Divinski", "title":"Phenomenon of ultrafast tracer diffusion of Co in HCP high entropy alloys", "journal":"Acta Materialia", "volume":"196", "OPTnumber":"", "OPTmonth":"9", "year":"2020", "OPTpages":"220-230", "OPTnote":"", "OPTkey":"diffusion; diffusion mechanism; HCP high-entropy alloys; DFT calculations", "DOI":"10.1016/j.actamat.2020.06.025"}
Logo RUB
  • Open positions
  • Travel information
  • Imprint
  • Privacy Policy
  • Sitemap
Ruhr-Universität Bochum
Universitätsstraße 150
44801 Bochum

  • Open positions
  • Travel information
  • Imprint
  • Privacy Policy
  • Sitemap
Seitenanfang Kontrast N