Crossover from disordered to core-shell structures of nano-oxide Y₂O₃ dispersed particles in Fe Academic Article

abstract

• Molecular dynamic simulations of Y2O3 in bcc Fe and transmission electron microscopy (TEM) observations were used to understand the structure of Y2O3 nano-clusters in an oxide dispersion strengthened steel matrix. The study showed that Y2O3 nano-clusters below 2nm were completely disordered. Y2O3 nano-clusters above 2nm, however, form a core-shell structure, with a shell thickness of 0.50.7nm that is independent of nano-cluster size. Y2O3 nano-clusters were surrounded by off-lattice Fe atoms, further increasing the stability of these nano-clusters. TEM was used to corroborate our simulation results and showed a crossover from a disordered nano-cluster to a core-shell structure.

authors

• Shao, Lin

published proceedings

• APPLIED PHYSICS LETTERS

altmetric score

• 0.5

author list (cited authors)

• Higgins, M. P., Lu, C. Y., Lu, Z., Shao, L., Wang, L. M., & Gao, F.

citation count

• 14

complete list of authors

• Higgins, MP||Lu, CY||Lu, Z||Shao, L||Wang, LM||Gao, F

publication date

• July 2016

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

keywords

• 40 Engineering
• 4018 Nanotechnology

Digital Object Identifier (DOI)

• 10.1063/1.4959776

start page

• 031911

volume

• 109

issue

• 3

URL

• http://dx.doi.org/10.1063/1.4959776