Initial oxidation behavior of Fe-Cr-Si alloys in 1200°C steam

被引：29

作者：

Moon, Joonho ^{[1
]}

Kim, Sungyu ^{[1
]}

Park, Won Dong ^{[1
]}

Kim, Tae Yong ^{[2
]}

McAlpine, Samuel Westcott ^{[3
]}

Short, Michael P. ^{[3
]}

Kim, Ji Hyun ^{[2
]}

Bahn, Chi Bum ^{[1
]}

机构：

[1] Pusan Natl Univ, Sch Mech Engn, Busan 46241, South Korea

[2] UNIST, Sch Mech & Nucl Engn, Dept Nucl Engn, Ulsan 44919, South Korea

[3] MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2019年 / 513卷

关键词：

Accident-tolerant fuel cladding; Fe-Cr-Si alloy; High-temperature oxidation test; Amorphous SiO2 layer; HIGH-TEMPERATURE OXIDATION; CLADDING CANDIDATE MATERIALS; THERMAL-OXIDATION; OXIDE LAYER; FUEL; DIFFUSION; KINETICS; IRON; CORROSION; TOLERANT;

D O I：

10.1016/j.jnucmat.2018.10.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Accident-tolerant fuel (ATF) cladding with high oxidation resistance during severe accidents is of critical importance to light water reactor safety and sustainability. One newly proposed ATF cladding concept, a multi-metallic layered composite (MMLC), hinges upon the oxidation resistance of an outer Fe-Cr-Si layer on top of a Zr-based alloy, separated by barrier layers to avoid Fe-Zr eutectic formation. The initial oxidation resistance of three potential Fe-Cr-Si alloys was evaluated by exposing them to 1200 degrees C oxidizing steam for up to one hundred seconds, along with a Zr-Nb-Sn alloy as a reference. The oxidation resistance of Fe12Cr2Si and Fe16Cr2Si was poor, exhibiting a porous, incomplete multilayer oxide composed mainly of mixed Fe/Cr/Si spinels. However, Fe20Cr2Si showed excellent oxidation resistance due to a continuous amorphous SiO2 layer formed at the metal-oxide interface, followed by almost fully dense Cr2O3. This motivates the consideration of Fe-Cr-Si alloys as an additional ATF design choice, similar to FeCrAl alloys in performance and oxidation resistance mechanism. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：297 / 308

页数：12

共 54 条

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