Magnetic properties and thermal stability of B2 and bcc phases in AlCoCrFeMn xNi

Simon R. Larsen*, Daniel Hedlund, Henry Stopfel, Christian Kolle Christensen, Peter Svedlindh, Johan Cedervall

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Alloys of AlCoCrFeMnxNi (x = 0.0, 0.04, 0.08, 0.12 and 0.16) have been synthesized through arc–melting and gas atomisation (x = 0.0 and 0.16) to investigate the effect of Mn additions to AlCoCrFeNi. Here, the structure, magnetic properties and the thermal stability of the alloys is presented. Electron microscopy confirmed the elemental composition and revealed the microstructure to consist of two spinodally decomposed phases. Rietveld analysis of standard powder X-ray diffraction showed the arc-melted samples consisted of two phases, a B2 phase and a bcc phase while the gas atomised powders consisted of a single-phased B2 structure. Magnetic measurements revealed an increase in the saturation magnetisation at room temperature by 68% for AlCoCrFeMnNi compared to AlCoCrFeNi. The thermal stability of the alloys was investigated using magnetometry, differential scanning calorimetry and in–situ X-ray diffraction, which showed that an increase in Mn content adversely effected the thermal stability of the alloy.
Original languageEnglish
Article number158450
JournalJournal of Alloys and Compounds
Volume861
Number of pages7
ISSN0925-8388
DOIs
Publication statusPublished - 25. Apr 2021
Externally publishedYes

Keywords

  • High entropy alloys
  • Magnetism
  • Phase transitions
  • X-ray diffraction

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