Development of accident tolerant FeCrAl-ODS steels utilizing Ce-oxide particles dispersion
Development of accident tolerant FeCrAl-ODS steels utilizing Ce-oxide particles dispersion
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DOI：
10.1016/j.jnucmat.2018.02.020
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发表时间：
2018-04-15
影响因子：
3.1
通讯作者：
Hirai, Mutsumi
中科院分区：
文献类型：
--
作者：
Shibata, Hiroki;Ukai, Shigeharu;Hirai, Mutsumi
研制了以ce -氧化物分散体代替y -氧化物分散体的fecr - ods铁素体钢，用于轻水反应堆耐事故燃料包壳。加入过量的氧（Ex. O）以改善机械性能。在700℃时，Ex. O = 0的拉伸强度约为200 MPa，这主要是由于粒径小于10 nm的Ce2O3颗粒分散所致。细Ce2O3颗粒的形成主要是与铁素体基体形成共格界面。随着Ex. O的增加，10 nm以上的较粗的Ce-Al型氧化物颗粒的数量密度增加，这是拉伸强度提高的原因。以Ex = o为参数，对FeCrAl-ODS钢中CeO2、Ce2O3、CeAlO3、Al2O3氧化物颗粒类型的变化进行了热力学分析(c) 2018 Elsevier B. V.所有权利保留。
FeCrAl-ODS ferritic steels with Ce-oxide dispersion instead of Y-oxide were produced for the accident tolerant fuel cladding of the light water reactor. Excess oxygen (Ex. O) was added to improve the mechanical property. The tensile strength at Ex. O = 0 is around 200 MPa at 700 degrees C, mainly owing to dispersed Ce2O3 particles in less than 10 nm size. The formation of the fine Ce2O3 particles is dominated by a coherent interface with ferritic matrix. With increasing Ex. O, an increased of number density of coarser Ce-Al type oxide particles over 10 nm size is responsible for the improvement of the tensile strength. Change of the type of oxide particle, CeO2, Ce2O3, CeAlO3, Al2O3, in FeCrAl-ODS steel was thermodynamically analyzed as a parameter of Ex = O. (c) 2018 Elsevier B. V. All rights reserved.