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Crystallization Kinetics and Structure Evolution during Annealing of Ni-Co-Mn-In Powders Obtained by Mechanical Alloying.

Edyta MatyjaKrystian PrusikMaciej ZubkoPaweł ŚwiecGrzegorz DerczJan Loskot
Published in: Materials (Basel, Switzerland) (2023)
The crystallization kinetics and structure evolution during annealing of the Ni 45.5 Co 4.5 Mn 36.6 In 13.4 (at. %) powders produced by mechanical alloying (MA) was investigated. After 70 h and 100 h of MA, the powder consisted of a mixture of amorphous and nanocrystalline body-centered cubic (bcc) phases. We observed the relaxation in the as-received powder. The relaxation temperature (T re ) increases logarithmically with the annealing time. Annealing above 440 °C results in (1) ordering of L2 1 , (2) dissolution of the residual Ni and Mn, (3) tetragonal MnNi phase formation and (4) γ phases precipitation. The activation energies of the B2 → L2 1 and Mn (α-Mn) → MnNi (P4/mmm) transformations were calculated.
Keyphrases
  • transition metal
  • metal organic framework
  • room temperature
  • single molecule
  • density functional theory
  • high resolution
  • aqueous solution