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Anisotropic Abnormal Grain Growth in TiO 2 /SiO 2 ‐Doped Alumina
Author(s) -
Kim YoungMin,
Hong SeongHyeon,
Kim DohYeon
Publication year - 2000
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.1151-2916.2000.tb01636.x
Subject(s) - grain growth , microstructure , materials science , abnormal grain growth , doping , anisotropy , grain size , metallurgy , chemical engineering , composite material , mineralogy , chemistry , optics , optoelectronics , physics , engineering
The effect of TiO 2 /SiO 2 addition on the grain growth of alumina was reinvestigated. TiO 2 promoted the grain growth, but there was no abnormal grain growth. However, codoping of TiO 2 and SiO 2 resulted in a duplex microstructure consisting of large platelike grains, ∼800 μm long and ∼100 μm thick, and fine matrix grains. The observed anisotropic abnormal grain growth was explained in terms of liquid formation during heat treatment.