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Tailoring Texture of γ‐Y 2 Si 2 O 7 by Strong Magnetic Field Alignment and Two‐Step Sintering
Author(s) -
Sun Z. Q.,
Zhu X. W.,
Li M. S.,
Zhou Y. C.,
Sakka Y.
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02514.x
Subject(s) - sintering , materials science , grain growth , texture (cosmology) , slip (aerodynamics) , anisotropy , magnetic field , dispersant , grain size , composite material , metallurgy , mineralogy , optics , chemistry , thermodynamics , image (mathematics) , physics , quantum mechanics , artificial intelligence , computer science , dispersion (optics)
In this study, a well‐dispersed γ‐Y 2 Si 2 O 7 ethanol‐based suspension with 30 vol% solid loading was prepared by adding 1 dwb% polyethylene imine dispersant, which allows feeble magnetic γ‐Y 2 Si 2 O 7 particles with anisotropic magnetic susceptibility to rotate in a 12 T strong magnetic field during slip casting, resulting in the development of a strongtexture in green bodies. Pressureless sintering gives rise to more pronounced grain growth in the textured sample than in the untextured sample prepared without the magnetic field due to the rapid migration of the grain boundaries of the well‐oriented grains, which was revealed by constant‐heating‐rate sintering kinetics. It was found that the use of two‐step sintering is very efficient not only for inhibiting the grain growth but also for enhancing thetexture. This implies that controlled grain growth is crucial for enhancing texture development in γ‐Y 2 Si 2 O 7 .