Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation

SCRIPTA MATERIALIA

卷:138

Article

Liu, Xiang¹  Miao, Yinbin²  Wu, Yaqiao^3,4  Maloy, Stuart A.⁵  Stubbins, James F.^1,6 

[1] Univ Illinois, Dept Nucl Plasma & Radiol Engn, Urbana, IL 61801 USA

[2] Argonne Natl Lab, Nucl Engn Div, Lemont, IL 60439 USA

[3] Boise State Univ, Dept Mat Sci & Engn, Boise, ID 83725 USA

[4] Ctr Adv Energy Studies, Idaho Falls, ID 83401 USA

[5] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA

[6] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

关键词: Oxide dispersion strengthened (ODS) alloy;    Microstructure;    Atom probe tomography;    Neutron irradiation;   

DOI  :  10.1016/j.scriptamat.2017.05.023

来源: Elsevier

【 摘 要 】

Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 degrees C and 450 degrees C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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