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Tailoring Ti 3 SiC 2 Ceramic via a Strong Magnetic Field Alignment Method Followed by Spark Plasma Sintering
Author(s) -
Hu Chunfeng,
Sakka Yoshio,
Grasso Salvatore,
Suzuki Tohru,
Tanaka Hidehiko
Publication year - 2011
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.1551-2916.2010.04186.x
Subject(s) - spark plasma sintering , materials science , ceramic , composite material , microstructure , relative density , slip (aerodynamics) , sintering , dispersant , indentation , vickers hardness test , green body , compaction , anisotropy , tape casting , optics , physics , thermodynamics , dispersion (optics)
Highly textured Ti 3 SiC 2 ceramic was successfully fabricated by slip casting in a 12 T strong magnetic field followed by spark plasma sintering. The optimized suspension parameters for slip casting were determined as 20 vol% Ti 3 SiC 2 and 1.5 wt% polyethyleneimine dispersant of powder in deionized water. After texturing in the 12 T strong magnetic field and then cold isostatic pressing, the relative densities of green bodies were 51.4% and 63.8%, respectively. X‐ray diffraction analysis revealed that the preferred orientation of Ti 3 SiC 2 grains perpendicular to the magnetic field direction was along the c ‐axis. After sintering at 1100° and 1000°C under the pressure of 120 and 500 MPa, respectively, the relative density of Ti 3 SiC 2 reached 88.2% and 98.6%. The Lotgering orientation factors on the textured top surface and textured side surface were determined as f (00 l ) =0.95 and f ( hk 0) =0.31, respectively. The textured microstructure contributed to the anisotropic mechanical property tested by Vickers indentation.