Ni radiotracer diffusion in B2 ordered NiFeAl alloys
Journal article, 2006

Ni bulk diffusion was measured in the B2 ordered NiFeAl alloys with a constant Al content of approximately 50 at.%. The 63Ni radioisotope in combination with the radiotracer serial sectioning technique was applied at higher temperatures and the secondary ion mass spectrometry (64Ni isotope) was used in a low temperature range. Arrhenius-type temperature dependencies were established for all studied compositions in the temperature interval from 1050 to 1500 K. As the Fe content x in the Ni 50-xFexAl50 ternary alloys increases, the Ni diffusivity generally increases along the quasi-binary section between stoichiometric NiAl and FeAl. The activation enthalpy Q of Ni diffusion changes strongly non-monotonically in the ternary alloys between the binary end-members NiAl and FeAl revealing a pronounced minimum at the Ni40Fe 10Al50 composition and a conspicuous maximum around the Ni25Fe25Al50 composition. © 2005 Elsevier Ltd. All rights reserved.


S. Divinski

University of Münster

F. Hisker

University of Münster

W. Löser

Leibniz Institute for Solid State and Materials Research Dresedn

Ulf Södervall

Chalmers, Microtechnology and Nanoscience (MC2)

C. Herzig

University of Münster


0966-9795 (ISSN)

Vol. 14 3 308-314

Subject Categories

Physical Sciences



More information

Latest update

9/2/2019 3