Small-angle neutron scattering study on the stability of oxide nanoparticles in long-term thermally aged 9Cr-oxide dispersion strengthened steel |
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| Affiliation: | 1.Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;2.Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;3.Institute of Power Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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| 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. |
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| Keywords: | oxide dispersion strengthened (ODS) steel small angle neutron scattering (SANS) thermal aging nanoparticle |
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