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Effectively Inhibiting Abnormal Grain Growth of Alumina in ZTA with Low‐Content Fine‐Sized ZrO 2 Inclusions Introduced by Infiltration and In Situ Precipitation
Author(s) -
Liu Guanwei,
Xie Zhipeng,
Wu Yin
Publication year - 2010
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.1551-2916.2010.04208.x
Subject(s) - microstructure , materials science , homogeneous , composite number , precipitation , homogeneity (statistics) , infiltration (hvac) , in situ , chemical engineering , zirconium , composite material , grain growth , mineralogy , metallurgy , chemistry , statistics , physics , mathematics , organic chemistry , meteorology , engineering , thermodynamics
Previous literatures have all emphasized that the successful control of microstructure homogeneity of ZTA (ZrO 2 toughened Al 2 O 3 ) composites can only be achieved provided that the ZrO 2 particles are homogeneously distributed and the volume content exceeds 5 vol%. In this paper, we report our strategy to incorporate fine‐sized ZrO 2 into Al 2 O 3 by infiltrating presintered alumina compact using zirconium ion‐containing solution and then in situ precipitation with ammonia solution. Homogeneous microstructure without AGG can be achieved in the prepared composite at a lower ZrO 2 content (2.3 vol%). Such a result might be attributed to the excellent homogeneous distribution of fine‐sized incorporated ZrO 2 particles in Al 2 O 3 matrix.