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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Crystal and metal/oxide interface structures of nanoparticles in 15Cr-2W-0.1Ti-4Al-0.6Hf-0.35Y(2)O(3) ODS steel
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Crystal and metal/oxide interface structures of nanoparticles in 15Cr-2W-0.1Ti-4Al-0.6Hf-0.35Y(2)O(3) ODS steel

机译：纳米颗粒的晶体和金属/氧化物界面结构在15cr-2w-0.1ti-4al-0.6HF-0.35Y（2）O（3）ODS钢中

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FeCrAl oxide dispersion strengthened (ODS) steel is one of the most promising candidate cladding materials of generation IV nuclear fission reactors because of its excellent resistance to not only corrosion but also Cr-ep and irradiation due to the ultrahigh density nanometer-scAl- oxides. Crystal and metal/ oxide interface structures of the nanoparticles in FeCrAl-ODS steel with Hf addition, i.e., Fe-15Cr-2W- 0.1Tie4Al-0.6Hf-0.35Y(2)O(3), have been studied by high resolution transmission electron microscopy (HRTEM). The characterization of crystal structure was accomplished on up to 153 particles, which have diameter of 2-10 nm and peak number fraction and, therefore, represent the oxides contributing most significantly to the macroscopic properties of the ODS steel, and, subsequently, the proportions of particles having crystal structures consistent with various types oxides were determined by statistical analyses. Relative to FeCrAl-ODS steel without Hf addition, i.e., Fe-15.5Cr-2W-0.1Ti-4Al-0.35Y(2)O(3) ODS steel, the coherency of the oxide nanoparticles was considerably improved. The crystal structure of about 51% of the nanoparticles W-re found to be consistent with Y2Hf2O7 oxide with anion-deficient fluorite structure while the crystal structures of only similar to 32% of the nanoparticles are consistent with Y-Al complex oxides, which indicates that the addition of 0.6 wt.% Hf into FeCrAl-ODS steel inhibits the formation of Y eAl complex oxides remarkably while prompts the significant occurrence of YeHf complex oxides. The crystal structures of about 17% of the nanoparticles are consistent with Y-Ti complex oxides, which indicates even a very small amount of Ti could promote the significant formation of Y-Ti complex oxides. The crystallographic orientation correlations of the oxides and matrix were determined. The formation mechanisms of various kinds of oxides and, moreover, the reasons of the unusual irradiation tolerance and thermal stability of the ODS steel are discussed based on the results. (c) 2020 Elsevier B.V. All rights reserved.
机译：铁铬氧化物弥散强化（ODS）钢，因为其不仅腐蚀以及Cr-EP和照射优良的耐的第四代核裂变反应堆的最有希望的候选包层材料中的一种，由于超高密度纳米接缩放氧化物。即，铁的15Cr-2W- 0.1Tie4Al-0.6Hf-0.35Y（2）O（3），已经研究了通过高分辨率透射在铁铬-ODS钢的纳米颗粒与HF另外，晶体和金属/氧化物界面结构电子显微镜（HRTEM）。晶体结构的表征在多达153个颗粒，其具有2-10纳米，峰值数量分数直径，因此完成的，代表氧化物到ODS钢的宏观性质贡献最大显著，以及随后的比例的具有氧化物通过统计分析确定各种类型的一致的晶体结构的颗粒。相对于铁铬-ODS钢无HF此外，即Fe-15.5Cr-2W-0.1Ti-4AL-0.35Y（2）O（3）ODS钢，氧化物纳米颗粒的相干性被显着改善。的纳米粒子的W-Re的约51％的晶体结构发现与Y2Hf2O7乙烷与阴离子不足型萤石结构一致，而只有类似〜32％的纳米颗粒的晶体结构是一致的，其中Y-Al系复合氧化物，其指示，加入0.6重量％的HF的成铁铬-ODS钢抑制ýEAL复合氧化物的形成显着，同时提示YeHf复合氧化物的显著发生。的纳米颗粒的约17％的晶体结构，其中Y-Ti系复合氧化物，其表示的Ti，即使一个非常小的量可以促进Y型钛复合氧化物的形成显著一致。确定氧化物和基质的晶体取向相关性。各种氧化物和，形成机制此外，异常照射公差和ODS钢的热稳定性的原因进行了探讨基于该结果。 （c）2020 Elsevier B.v.保留所有权利。

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