An in situ SANS study of nanoparticles formation in 9Cr ODS steel powders

作者：He, Pei^*; Gao, Penglin; Tian, Qiang; Lv, Jianming; Yao, Weizhi

来源：Materials Letters, 2017, 209: 535-538.

DOI：10.1016/j.matlet.2017.08.051

• Nanoparticles
• Neutron diffraction and scattering
• ODS steel powders
• In situ SANS

The characteristics of strengthening nanoparticles have a major influence on the mechanical property and irradiation resistance of oxide dispersion strengthened (ODS) steels. In situ small angle neutron scattering (SANS) experiments were performed to determine the evolution of nanoparticles in 9Cr ODS steel powders varied with temperature. Initial-added Y2O3 was completely dissolved into the steel matrix after mechanical alloying. Nanoparticles emerge after annealing at 600 degrees C for 10 min and coarsen slightly after 12 h. The radius of nanoparticles increases from 0.73 nm at 600 degrees C to 1.63 nm at 1000 degrees C, while the volume fraction decreases with increasing annealing temperature.

• 出版日期2017-12-15
• 单位中国工程物理研究院; 北京科技大学; 中国工程物理研究院核物理与化学研究所