Small-angle neutron scattering study on the stability of oxide nanoparticles in long-term thermally aged 9Cr-oxide dispersion strengthened steel
Penglin Gao, Jian Gong, Qiang Tian, Gung-Ai Sun, Haiyang Yan, Liang Chen, Liangfei Bai, Zhimeng Guo, Xin Ju
Abstract
A 9Cr-oxide dispersion strengthened (ODS) steel was thermally aged at 873 K for up to 5000 h. The size distribution and chemical composition of the dispersed oxide nanoparticles were analyzed by small-angle neutron scattering under a magnetic field. Combined with transmission electron microscopy, Vickers micro-hardness tests and electron backscattered diffraction measurements, all the results showed that the thermal treatment had little or no effect on the size distributions and volume fractions of the oxide nanoparticles in the ferromagnetic matrix, which suggested excellent thermal stability of the 9Cr-ODS steel.
Topics & Concepts
Materials scienceOxideDispersion (optics)Small-angle neutron scatteringThermal stabilityFerromagnetismScatteringTransmission electron microscopyComposite materialNeutron scatteringNanoparticleNeutron diffractionAnalytical Chemistry (journal)DiffractionChemical engineeringMetallurgyOpticsCondensed matter physicsNanotechnologyChemistryEngineeringPhysicsChromatographyFusion materials and technologiesIon-surface interactions and analysisNuclear Physics and Applications