Investigation of grain-boundary geometry and pores morphology in dense and porous cubic zirconia polycrystals

Journal Article · Mon Sep 15 00:00:00 EDT 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.06.004· OSTI ID:22420560

Bobrowski, Piotr ^[1]; Faryna, Marek ^[1]; Pędzich, Zbigniew ^[2]

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1. Institute of Metallurgy and Materials Science, 25 Reymonta Street, PL 30-059 Kraków (Poland)
2. AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Mickiewicza 30 Street, PL 30-059 Kraków (Poland)

Highlights: • Cubic zirconia sinters were investigated in three dimensions using dual-beam FEGSEM. • The 3D-EBSD technique was successfully applied to non-conductive ceramics. • New sample preparation approach to automated 3D-EBSD was proposed. • Grain boundary microstructures were reconstructed from inverse pole figure maps. • Pore microstructures were reconstructed from image quality maps. - Abstract: Three-dimensional electron backscatter diffraction technique was used for the visualization of grain boundary geometry and pore morphology in cubic zirconia. A set of four samples sintered under different conditions was investigated. Specimens which were characterized by energy dispersive spectroscopy and X-ray diffraction were entirely composed of cubic phase. Investigations of boundaries and pore structures were carried out in a dual-beam scanning electron microscope. For each sample, a volume of 1000 μm{sup 3} was investigated. The analysis of grain boundary networks reconstructed from inverse pole figure maps revealed a strong dependence between grain boundary density and sample preparation parameters. Sintering also affects the size and distribution of pores. The total number of grains analyzed varied from 17 to 357 and the calculated volume of cavities from 0.01% to 21%. This paper shows the application of three-dimensional crystallographic orientation analysis to characterize the microstructure of yttria stabilized zirconia ceramics.

• OSTI ID: 22420560
• Journal Information: Materials Research Bulletin, Vol. 57; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BACKSCATTERING
CERAMICS
CUBIC LATTICES
ELECTRON DIFFRACTION
GRAIN BOUNDARIES
MORPHOLOGY
POLYCRYSTALS
PORE STRUCTURE
POROUS MATERIALS
SCANNING ELECTRON MICROSCOPY
SINTERING
THREE-DIMENSIONAL LATTICES
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES