The characteristics of strengthening nanoparticles have a major influence on the mechanical property and irradiation resistance of oxide dispersion strengthened (ODS) steels. To determine how to control nanoparticles evolution, 0.3% Ti with 0.3% Y₂O₃ were added in 13.5%Cr pre-alloyed steel powders via different milling and consolidation conditions, then characterized by transmission electron microscopy (TEM) and X-ray absorption fine structure (XAFS) at synchrotron irradiation facility. The dissolution of Y₂O₃ is greatly dependent on the milling time at fixed milling speeds. After 24 h of milling, only minor amounts of the initially added Y₂O₃ dissolve into the steel matrix whereas TEM results reveal nearly complete dissolution of Y₂O₃ in 80-h-milled powder. The annealed powder FT-A800 (at 800 °C for 1 h) exhibits a structure near to the initially added Y₂O₃. The slightly deviation may be accounted for considerable lattice distortion related to the presence of atomic vacancies or formation of Y-Ti-O nucleus. The annealed powders FT-A1000 and FT-A1100 contain complex mixtures of Y-O/Y-Ti-O oxides, which cannot be fitted by any single thermally stable compounds. The coordination numbers of these first two shells in the annealed powders significantly raise as a function of the annealing temperature, indicating the formation of more ordered Y-O or Y-Ti-O particles. The extended X-ray absorption fine structure (EXAFS) spectrum could not necessarily distinguish the dominant oxide species.

增强纳米颗粒的特性对氧化物弥散强化（ODS）钢的机械性能和耐辐照性具有重大影响。为了确定如何控制纳米颗粒的演变，通过不同的研磨和固结条件，将13.5％Cr预合金钢粉中添加了0.3％Ti和0.3％Y ₂ O ₃，然后通过透射电子显微镜（TEM）和X射线吸收进行了表征同步辐射装置上的微结构（XAFS）。在固定的研磨速度下，Y ₂ O ₃的溶解很大程度上取决于研磨时间。研磨24小时后，仅添加少量的最初添加的Y ₂ O ₃溶解在钢基质中，而TEM结果显示，Y ₂ O ₃在80小时研磨的粉末中几乎完全溶解。退火粉末FT-A800（在800°C下持续1 h）表现出接近于最初添加的Y ₂ O _{3的结构。}。轻微的偏差可能是由于与原子空位的存在或Y-Ti-O原子核的形成有关的相当大的晶格畸变造成的。退火粉末FT-A1000和FT-A1100包含YO / Y-Ti-O氧化物的复杂混合物，无法由任何一种热稳定化合物组成。退火粉末中的前两个壳的配位数随着退火温度的升高而显着提高，表明形成了更有序的YO或Y-Ti-O颗粒。扩展的X射线吸收精细结构（EXAFS）光谱不一定能区分主要的氧化物种类。