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Superplastic Alumina Ceramics with Grain Growth Inhibitors
Author(s) -
Xue Liang A.,
Wu Xin,
Chen IWei
Publication year - 1991
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.1151-2916.1991.tb06935.x
Subject(s) - superplasticity , materials science , grain growth , ceramic , grain size , metallurgy , alumina ceramic , sintering , deformation (meteorology) , tension (geology) , composite material , microstructure , ultimate tensile strength
Superplastic deformation of alumina ceramics was studied at 1400° to 1450°C and at a strain rate of 4 × 10 −5 to 5 × 10 −4 s −1 . MgO and ZrO 2 were introduced to suppress dynamic grain growth. The latter was especially effective; grain growth was minimal in 10‐vol%‐ZrO 2 ‐containing material. Both materials were superplastically stretched under biaxial tension to 100% engineering strain with good surface finishing, demonstrating the feasibility of superplastic forming for alumina ceramics.