HRTEM study of yttrium oxide particles in ODS steels for fusion reactor applicat

2019-07-21 17:05:22

The crystal orientation oxide Y2O3

责任者: Klimiankou, M.;Lindau, R.;Moslang, A. 单位: Institut fur Materialforsch. I, Forschungszentrum Karlsruhe GmbH, 76021 Karlsruhe, Germany 来源出处: Journal of Crystal Growth,2003,249(1-2):381-387 摘要: An oxide dispersion strengthened ferritic-martensitic steel with yttrium oxide (Y2O3) was produced by mechanical alloying and hot isostatic pressing techniques for high-performance structures of fusion energy devices. The structure of the nanometer-sized Y2O3 particles analysed by HRTEM shows a strong correlation of its crystallographic orientation with the alloy lattice. The orientation correlations [1 1 0]YO parallel [1 1 1]FeCr and (1 1 over-bar 1 over-bar )YO parallel (1 1 over-bar 0)FeCr were found. The strong orientation correlation appears during HIPing processes around 1050°C, which is significantly lower than the melting temperature of Y2O3 that amounts to 2500°C. © 2002 Elsevier Science B.V. All rights reserved. 关键词: Steel;Fusion reactors;Yttrium compounds;Martensite;Dispersions;Hot isostatic pressing;Mechanical alloying;Nanostructured materials;Crystal lattices;Crystallography;Solidification;Crystal orientation;Melting;High resolution electron microscopy;Transmission electron microscopy;Fusion energy