Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4984
Title: Microstructural development of interface layers between co-sintered alumina and spinel compacts
Authors: Yalamaç, Emre
Carry, Claude
Akkurt, Sedat
Keywords: Al2O3
Interfaces
Microstructure-final
Sintering
Spinels
Sintered alumina
Issue Date: Aug-2011
Publisher: Elsevier Ltd.
Source: Yalamaç, E., Carry, C., and Akkurt, S. (2011). Microstructural development of interface layers between co-sintered alumina and spinel compacts. Journal of the European Ceramic Society, 31(9), 1649-1659. doi:10.1016/j.jeurceramsoc.2011.03.020
Abstract: Tests were performed to investigate the microstructure of the interface between alumina and spinel materials after high temperature thermal treatment (1500°C). The first test involved co-sintering of co-pressed alumina and spinel compacts. Microstructures were investigated by SEM, EDS, WDS and EBSD. A microstructurally distinct layer with columnar grains of up to 40μm length and 5μm width was observed after 16h at 1500°C. Growth rate of the columnar spinel grains from parent spinel towards alumina follows parabolic kinetics, controlled by a mixed process of O2- ion diffusion and interface reaction. Diffusion couples of spinel and alumina were investigated. Same columnar spinel grains were observed at the interface which grew into alumina during thermal treatment with the same kinetics as in co-sintering experiments. The shape of the phase boundaries between spinel and alumina can be a further indication of the direction of their growth.
URI: http://doi.org/10.1016/j.jeurceramsoc.2011.03.020
http://hdl.handle.net/11147/4984
ISSN: 0955-2219
1873-619X
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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