Tailoring Ti3SiC2 Ceramic via a Strong Magnetic Field Alignment Method Followed by Spark Plasma Sintering
Highly textured Ti3SiC2 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% Ti3SiC2 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 Ti3SiC2 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 Ti3SiC2 reached 88.2% and 98.6%. The Lotgering orientation factors on the textured top surface and textured side surface were determined as f(00l)=0.95 and f(hk0)=0.31, respectively. The textured microstructure contributed to the anisotropic mechanical property tested by Vickers indentation.
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Document Type: Research Article
Fine Particle Processing Group, Nano Ceramics Center, NIMS, Tsukuba, Ibaraki 305-0047, Japan
World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan
Publication date: March 1, 2011