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- Title
Crystallization Kinetics and Structure Evolution during Annealing of Ni-Co-Mn-In Powders Obtained by Mechanical Alloying.
- Authors
Matyja, Edyta; Prusik, Krystian; Zubko, Maciej; Świec, Paweł; Dercz, Grzegorz; Loskot, Jan
- Abstract
The crystallization kinetics and structure evolution during annealing of the Ni45.5Co4.5Mn36.6In13.4 (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 (Tre) increases logarithmically with the annealing time. Annealing above 440 °C results in (1) ordering of L21, (2) dissolution of the residual Ni and Mn, (3) tetragonal MnNi phase formation and (4) γ phases precipitation. The activation energies of the B2 → L21 and Mn (α-Mn) → MnNi (P4/mmm) transformations were calculated.
- Subjects
CRYSTALLIZATION kinetics; BODY centered cubic structure; POWDERS; ACTIVATION energy; SHAPE memory alloys
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 2, p645
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16020645