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Microstructure and Bending Strength of 3Y‐TZP/12Ce‐TZP Ceramics Fabricated by Liquid‐Phase Sintering at Low Temperature
Author(s) -
Qin Haixia,
Huang Xiaoxian
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.tb01653.x
Subject(s) - sintering , materials science , microstructure , spinel , flexural strength , ceramic , liquid phase , grain growth , phase (matter) , composite material , grain size , metallurgy , physics , chemistry , organic chemistry , thermodynamics
With the addition of 1 wt% of MgO–Al 2 O 3 –SiO 2 glass as a sintering aid, 3Y‐TZP/12Ce‐TZP ceramics (composed from a mixture of 3Y‐TZP and 12Ce‐TZP powder) have been fabricated via liquid‐phase sintering at 1250°–1400°C. In the sintered bodies, the grain growth of Y‐TZP is almost unaffected, whereas that of Ce‐TZP is inhibited. MgO·Al 2 O 3 spinel and an amorphous phase that contains Al 2 O 3 and SiO 2 (from the sintering aid) fully fill the grain junctions. The bending strength of 3Y‐TZP/12Ce‐TZP, when sintered at 1250°–1300°C, is ∼800–900 MPa, which is greater than that of 3Y‐TZP ceramics without Ce‐TZP particles. Ce‐TZP grains and MgO·Al 2 O 3 spinel in 3Y‐TZP/12Ce‐TZP ceramics may impede crack growth, and the bending strength is enhanced.