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Microstructure and Surface Segregation of 3 mol% Y2O3-Doped ZrO2 Particles

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Microstructure of a commercial 3 mol% yttria-doped zirconia nano-particulate powder was observed by transmission electron microscopy, and the distribution of yttrium cation was investigated by energy-dispersive X-ray spectroscopy (EDS) with a probe size less than 1 nm. The cross-sectional high-resolution transmission electron microscopy observations revealed that there are two kinds of particles, consisting of single-phase tetragonal and two phases comprising tetragonal and monoclinic. EDS analysis revealed that yttrium cations segregate to the surface of the tetragonal particle. The origin of tetragonal to monoclinic transformation was considered to be due to external stress during the powder milling process.

Document Type: Research Article


Affiliations: 1: Department of Mechanical Engineering, Faculty of Engineering, Sojo University, Kumamoto, Japan 2: National Institute for Materials Science, Tsukuba, Japan 3: Synthetic Chemicals Production, Tosoh Corporation, Shunan, Japan 4: Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Tokyo, Japan

Publication date: 2006-09-01

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