Affordable Access

Publisher Website

On the stability of the ordered Pd8V phase in a proton-irradiated Pd-15at.%V alloy

Authors
Journal
Journal of the Less Common Metals
0022-5088
Publisher
Elsevier
Publication Date
Volume
141
Issue
1
Identifiers
DOI: 10.1016/0022-5088(88)90209-3
Disciplines
  • Physics

Abstract

Abstract The maximum temperature at which the ordered Pd 8V phase forms in a Pd-15at.%V alloy irradiated by 400 keV protons was determined to lie between 350 and 420 °C. Post-irradiation annealing experiments have established that Pd 8V is most probably a thermodynamically stable equilibrium phase with a critical ordering temperature slightly below 400 °C. Pd 8V is not expected to nucleate and grow under conditions of normal isothermal annealing (because of the low temperature range of its stability) unless diffusion is accelerated, in this case by charged particle irradiation. Interstitial dislocation loops are prevalent in the microstructure of samples irradiated at low temperatures (200 °C), whereas more widely extended stacking fault ribbons are commonly observed at higher irradiation temperatures (420 °C). The segregation of undersized vanadium atoms to these defects causes the preferential formation of Pd 8V in regions between them.

There are no comments yet on this publication. Be the first to share your thoughts.