Influence of nano-particle coherency degree on the coarsening resistivity of the nano-oxide particles of Fe–14Cr–1W ODS alloys

• Published in: Journal of nuclear materials Vol. 455; no. 1-3; pp. 618 - 623
• Main Authors: Zhong, S Y, Ribis, J, Lochet, N, de Carlan, Y, Klosek, V, Mathon, M H
• Format: Journal Article
• Language: English
• Published: 01-12-2014
• Subjects: Coarsening; Coherence; Dispersion hardening alloys; Dispersions; Ferrous alloys; Nanostructure; Oxides; Titanium
• ISSN: 0022-3115
• DOI: 10.1016/j.jnucmat.2014.08.045

High chrome oxide dispersion strengthened (ODS) ferritic alloys exhibit a high mechanical resistance at high temperature as well as high resistance to radiation damage due to its high density of Y-Ti-O nano clusters. In order to correlate the coarsening resistance of Fe-14Cr-1W ODS alloys with nano-particle coherency degree and nominal content of Y and Ti, SANS analysis and TEM investigations are used to characterize the size distributions of nano oxides and the interface configuration before and after heat treatment at 1300 [degrees]C. The result indicates that the ratio of Ti/Y plays an important role on the coarsening kinetics. The nano oxides of the sample with a high ratio of Ti/Y superior to 1 are more stable owing to the minimizing of the interfacial energy partide/matrix.