Morphology of oxide particles in ODS austenitic stainless steel
Morphology of oxide particles in ODS austenitic stainless steel
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DOI：
10.1016/j.jnucmat.2013.04.073
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发表时间：
2013-11
影响因子：
3.1
通讯作者：
H. Oka;Masashi Watanabe;N. Hashimoto;S. Ohnuki;S. Yamashita;S. Ohtsuka
中科院分区：
文献类型：
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作者：
H. Oka;Masashi Watanabe;N. Hashimoto;S. Ohnuki;S. Yamashita;S. Ohtsuka
在这项研究中，鉴定的晶体结构和分析的氧化物弥散强化奥氏体不锈钢中的氧化物颗粒的取向关系进行。高分辨率透射电子显微镜（HRTEM）和能量色散谱表明，大多数的氧化物颗粒具有多面的形状，并由一个复杂的氧化物，阴离子缺乏的萤石结构Y2Hf2O7。选区衍射图和高分辨透射电镜表明，多面氧化物颗粒与周围的基质具有立方对立方的取向关系。此外，应变场观察周围的氧化物颗粒与给定的反射条件，表明它包围的氧化物颗粒。观察到的应变场将影响滑移位错钉扎和辐照引起的点缺陷的迁移。
In this study, identification of the crystal structure and analysis of the orientation relationship of oxide particles in an oxide dispersion strengthened austenitic stainless steel was carried out. High resolution transmission electron microscopy (HRTEM) and energy dispersive spectroscopy showed that most of the oxide particles had a faceted shape and consisted of a complex oxide, the anion-deficient fluorite structure Y2Hf2O7. Selected area diffraction patterns and HRTEM indicated that the faceted oxide particle has a cube-on-cube orientation relationship with the surrounding matrix. In addition, strain fields were observed around the oxide particle with given reflection conditions, indicating that it surrounds the oxide particle. The observed strain fields would affect glide dislocation pinning and the migration of irradiation-induced point defects.