Radiation-induced Ostwald ripening in oxide dispersion strengthened ferritic steels irradiated at high ion dose

被引：111

作者：

Lescoat, M. -L. ^{[1
]}

Ribis, J. ^{[1
]}

Chen, Y. ^{[2
]}

Marquis, E. A. ^{[2
]}

Bordas, E. ^{[3
]}

Trocellier, P. ^{[3
]}

Serruys, Y. ^{[3
]}

Gentils, A. ^{[4
]}

Kaitasov, O. ^{[4
]}

de Carlan, Y. ^{[1
]}

Legris, A. ^{[5
]}

机构：

[1] CEA, DEN, SRMA, F-91191 Gif Sur Yvette, France

[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[3] CEA, DEN, Lab JANNUS, Serv Rech Met Phys, F-91191 Gif Sur Yvette, France

[4] Univ Paris 11, CSNSM, CNRS, IN2P3, F-91405 Orsay, France

[5] Univ Lille 1, UMET, CNRS, UMR 8207, F-59655 Villeneuve Dascq, France

来源：

ACTA MATERIALIA | 2014年 / 78卷

关键词：

ODS steels; Irradiation effect; Ostwald ripening; Phase stability; Atom-probe tomography; 3-DIMENSIONAL ATOM-PROBE; NEUTRON-IRRADIATION; ODS STEELS; ORIENTATION RELATIONSHIPS; STABILITY; ALLOYS; MA957; NANOCLUSTERS; PARTICLES; MORPHOLOGY;

D O I：

10.1016/j.actamat.2014.06.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxide dispersion strengthened (ODS) ferritic steels are considered promising candidates as cladding tubes for Generation IV nuclear reactors. In such reactors, irradiation damage can reach more than 150 dpa at temperatures ranging from 400 to 650 degrees C. Thus nanopartide stability has to be guaranteed in order to ensure that these materials possess excellent creep properties. Using Fe ions, ODS steels were irradiated at 500 degrees C up to 150 dpa. At this temperature the nano-oxide population evolution under irradiation is similar to that observed after annealing at high temperature. It consists of a slight increase in the particle size and a slight decrease in the density, which can be both explained by an Ostwald ripening mechanism. Conversely, irradiations performed at room temperature using Au ions lead to a complete dissolution of the oxide particles, in agreement with the estimation of ballistic vs. radiation enhanced diffusion effects. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：328 / 340

页数：13

共 44 条

[21] Crystal structural and optical properties of Cr-doped Y2Ti2O7 and Y2Sn2O7 pyrochlores [J].