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In‐Situ Formation of Ce‐TZP‐M‐Type Hexaferrite Composites
Author(s) -
Kojima Takashi,
Sakamoto Wataru,
Yogo Toshinobu,
Fujii Takashi,
Hirano Shinichi
Publication year - 1998
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.1151-2916.1998.tb02721.x
Subject(s) - materials science , microstructure , composite material , composite number , ceramic , flexural strength , in situ , magnetization , magnetic field , chemistry , physics , organic chemistry , quantum mechanics
Composites consisting of a Ce‐TZP matrix and in‐situ grown particles of La(Fe,Al) 12 O 19 were prepared by the solid‐state reaction of Ce‐TZP, La(Fe,Al)O 3 , and Al 2 O 3 powders. The in‐situ formation process of La(Fe,Al) 12 O 19 in a Ce‐TZP matrix was investigated in relation to the microstructure evolution. The Ce‐TZP‐La(Fe,Al) 12 O 19 composites had significant magnetic properties and improved mechanical properties. The maximum value of magnetization of the Ce‐TZP‐La(Fe,Al) 12 O 19 composites was obtained at 90 mol% LaFe 12 O 19 in La(Fe,Al) 12 O 19 . The value of the three‐point bending strength of Ce‐TZP‐20 wt% La(Fe,Al) 12 O 19 (90 mol% LaFe 12 O 19 ) sintered at 1350°C was 780 MPa, compared with 500 MPa of Ce‐TZP ceramics. The composite demonstrated crack sensing based upon the change in magnetic gradient.