Morphology, crystal and metal/oxide interface structures of nanoparticles in Fe-15Cr-2W-0.5Ti-7Al-0.4Zr-0.5Y2O3 ODS steel
Morphology, crystal and metal/oxide interface structures of nanoparticles in Fe-15Cr-2W-0.5Ti-7Al-0.4Zr-0.5Y2O3 ODS steel
复制标题
Fe—15Cr—2W—0.5Ti—7Al—0.4Zr—0.5Y2O3 ODS钢中纳米颗粒的形貌、晶体和金属/氧化物界面结构
DOI：
10.1016/j.jnucmat.2019.05.055
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发表时间：
2019-09-01
影响因子：
3.1
通讯作者：
Kimura, Akihiko
中科院分区：
文献类型：
--
作者：
Dou, Peng;Sang, Wei;Kimura, Akihiko
用透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）研究了添加Ti和Zr的feral氧化物弥散强化（ODS）钢中的纳米粒子UOC-10 (Fe-15Cr-2W-0.5Ti-7Al-0.4Zr-0.5Y（2)O(3)）。鉴定了134个粒径主要在4 ~ 11 nm的纳米颗粒的物相和峰数分数，它们代表了对ODS钢宏观性能贡献最大的氧化物，并确定了各种氧化物的比例。相对于未添加Zr的FeCrAl-ODS钢，即SOC-9 (Fe-15.5Cr-2W-0.1Ti-4Al-0.35Y(2)O(3))， UOC-10中氧化物纳米粒子的分散形态和一致性显著改善。UOC-10中的纳米颗粒与δ相Y4Zr3O12（相似度为44.8%）、缺陷萤石Y2Zr2O7（相似度为15.7%）、钙钛矿YAlO3（相似度为14.2%）和正交Y2TiO5（相似度为11.2%）相一致，偶尔也会发现扭曲的钙钛矿YTiO3氧化物。几乎所有的纳米颗粒都与bcc钢基体呈相干（78.4%）或半相干（20.3%）。测定了氧化物与基体的晶体取向关系。将所得结果与SOC-9和SOC-14 (Fe-15Cr-2W-0.1Ti-4Al-0.63Zr-0.35Y（2)O(3)）的结果进行了比较，并简要讨论了各种氧化物的形成机理，以及氧化物不同寻常的热稳定性和辐照稳定性以及UOC-10优异的辐照耐受性和超强的强度。(C) 2019 Elsevier B.V.版权所有
The nanoparticles in a FeCrAl oxide dispersion strengthened (ODS) steel with Ti and Zr addition, i.e., UOC-10 (Fe-15Cr-2W-0.5Ti-7Al-0.4Zr-0.5Y(2)O(3)), have been examined by transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The phases of 134 nanoparticles, which have diameter mainly of 4-11 nm and peak number fraction and, therefore, represent the oxides contributing most significantly to the macroscopic properties of the ODS steel, were identified and, moreover, the proportions of various types of oxides were determined. Relative to FeCrAl-ODS steel without Zr addition, i.e., SOC-9 (Fe-15.5Cr-2W-0.1Ti-4Al-0.35Y(2)O(3)), the dispersion morphology and coherency of the oxide nanoparticles in UOC-10 were significantly improved. The nanoparticles in UOC-10 were found to be consistent with delta-phase Y4Zr3O12 (similar to 44.8%), defect fluorite Y2Zr2O7 (similar to 15.7%), perovskite YAlO3 (YAP) (similar to 14.2%) and orthorhombic Y2TiO5 (similar to 11.2%) with distorted perovskite YTiO3 oxide occasionally detected. Almost all of the nanoparticles are either coherent (similar to 78.4%) or semi-coherent (similar to 20.3%) with bcc steel matrix. The crystallographic orientation correlations of the oxides and matrix were determined. The results are compared with those of SOC-9 and SOC-14 (Fe-15Cr-2W-0.1Ti-4Al-0.63Zr-0.35Y(2)O(3)) with a brief discussion of the mechanisms of the formation of various kinds of oxides and, moreover, the unusual thermal and irradiation stabilities of the oxides as well as the excellent irradiation tolerance and superior strength of UOC-10. (C) 2019 Elsevier B.V. All rights reserved.