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Effects of SPS Mold on the Properties of Sintered and Simulated SiC-ZrB2 Composites
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 Title & Authors
Effects of SPS Mold on the Properties of Sintered and Simulated SiC-ZrB2 Composites
Lee, Jung-Hoon; Kim, In-Yong; Kang, Myeong-Kyun; Jeon, Jun-Soo; Lee, Seung-Hoon; Jeon, An-Gyun; Shin, Yong-Deok;
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 Abstract
Silicon carbide (SiC)-zirconium diboride () composites were prepared by subjecting a 60:40 vol% mixture of -SiC powder and matrix to spark plasma sintering (SPS) in 15 and 20 molds. The 15 and 20 compacts were sintered for 60 sec at under a uniaxial pressure of 50 MPa and argon atmosphere. Similar composites were simulated using 3D computer simulation software. The current and power densities of the specimen sections of the simulated SiC- composites were higher than those of the mold sections of the 15 and 20 mold simulated specimens. Toward the centers of the specimen sections, the current densities in the simulated SiC- composites increased. The power density patterns of the specimen sections of the simulated SiC- composites were nearly identical to their current density patterns. The current densities of the 15 mold of the simulated SiC- composites were higher than those of the 20 mold in the center of the specimen section. The volume electrical resistivity of the simulated SiC- composite was about 7.72 times lower than those of the graphite mold and the punch section. The power density, 1.4604 , of the 15 mold of the simulated SiC- composite was higher than that of the 20 mold, 1.3832 . The distributions in the 20 mold in the sintered SiC- composites were more uniform than those of the 15 mold on the basis of energy-dispersive spectroscopy (EDS) mapping. The volume electrical resistivity of the 20 mold of the sintered SiC- composite, , was lower than that of the 15 mold, , at room temperature.
 Keywords
Spark plasma sintering (SPS);Mold;Silicon carbide (SiC);Zirconium diboride ();Current density;Power density;Energy-dispersive spectroscopy (EDS);Flexural strength;Volume electrical resistivity;Simulated SiC- composite;Sintered SiC- composite;
 Language
English
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