Kinetics of reordering of Ni<inf>3</inf>Al disordered by ball-milling

M. D. Baró, S. Suriñach, J. Malagelada, M. T. Clavaguera-Mora, S. Gialanella, R. W. Cahn

Research output: Contribution to journalArticleResearchpeer-review

52 Citations (Scopus)

Abstract

A systematic study of the kinetics of the recording process, followed by X-ray diffraction and differential scanning calorimetry, of a Ni3Al based alloy, previously disordered by high energy ball-milling, is reported. X-ray diffraction analysis of isothermally annealed samples gives apparent activation energies of 1.57 ± 0.20 eV for reordering and 1.61 ± 0.07 eV for ordered domain growth. Good agreement is found between these values and that obtained from the calorimetric analysis of the continuous heating transformation, which gives a value for the apparent activation energy of 1.64 ± 0.21 eV. However, in order to correctly reproduce the calorimetric results upon isothermal annealing, an increasing value for the activation energy of the process is needed. As the experimental results suggest that point defect diffusion has an active role in the reordering process, a vacancy trapping mechanism via impurity is put forward to account for the slowing down of the kinetics of reordering. © 1993.
Original languageEnglish
Pages (from-to)1065-1073
JournalActa Metallurgica Et Materialia
Volume41
DOIs
Publication statusPublished - 1 Jan 1993

Fingerprint Dive into the research topics of 'Kinetics of reordering of Ni<inf>3</inf>Al disordered by ball-milling'. Together they form a unique fingerprint.

Cite this