Low temperature precipitation kinetics of niobium nitride platelets in Fe

Alexis Deschamps (1) , F. Danoix (2) , F. de Geuser (1) , T. Epicier (3) , H. Leitner , Michel Perez (3)

1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 GPM - Groupe de physique des matériaux
3 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

Single plane platelets of niobium nitride have been observed to form in a Fe-Nb-N alloy during ageing at 600 degrees C, using High Resolution Electron Microscopy, Field Ion Microscopy and Atom Probe Tomography. Small-angle neutron scattering has been used to investigate the kinetics of formation of these platelets. They are shown to nucleate in less than 5 min at this ageing temperature, and subsequently to grow in-plane to a size of about 10 nm without experiencing any change in thickness.

Mots clés: Niobium nitride; Small-angle neutron scattering; Precipitation; Steels

Domaines: Matériaux

Alexis Deschamps, F. Danoix, F. de Geuser, T. Epicier, H. Leitner, et al.. Low temperature precipitation kinetics of niobium nitride platelets in Fe. Materials Letters, 2011, 65 (14), pp.2265-2268. ⟨10.1016/j.matlet.2011.03.110⟩. ⟨hal-00640147⟩