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The Development of an Electroconductive SiC-ZrB2 Composite through Spark Plasma Sintering under Argon Atmosphere
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 Title & Authors
The Development of an Electroconductive SiC-ZrB2 Composite through Spark Plasma Sintering under Argon Atmosphere
Lee, Jung-Hoon; Ju, Jin-Young; Kim, Cheol-Ho; Park, Jin-Hyoung; Lee, Hee-Seung; Shin, Yong-Deok;
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 Abstract
The SiC- composites were fabricated by combining 30, 35, 40, 45 and 50 vol. % of zirconium diboride () powders with silicon carbide (SiC) matrix. The SiC- composites and the sintered compacts were produced through spark plasma sintering (SPS) under argon atmosphere, and its physical, electrical, and mechanical properties were examined. Also, the thermal image analysis of the SiC- composites was examined. Reactions between -SiC and were not observed via x-ray diffraction (XRD) analysis. The apparent porosity of the SiC+30vol.%, SiC+35vol.%, SiC+40vol.%, SiC+45vol.% and SiC+50vol.% composites were 7.2546, 0.8920, 0.6038, 1.0981, and 10.0108%, respectively. The XRD phase analysis of the sintered compacts demonstrated a high phase of SiC and . Among the composites, the SiC+50vol.% composite had the lowest flexural strength, 290.54MPa, the other composites had more than 980MPa flexural strength except the SiC+30vol.% composite; the SiC+40vol.% composite had the highest flexural strength, 1011.34MPa, at room temperature. The electrical properties of the SiC- composites had positive temperature coefficient resistance (PTCR). The V-I characteristics of the SiC- composites had a linear shape in the temperature range from room to . The electrical resistivities of the SiC+30vol.%, SiC+35vol.%, SiC+40vol.% SiC+45vol.% and SiC+50vol.% composites were , , , , and , respectively, at room temperature, and their resistance temperature coefficients were , , , , and in the temperature range from room to , respectively. Therefore, it is considered that among the sintered compacts the SiC+35vol.%, SiC+40vol.% and SiC+45vol.% composites containing the most outstanding mechanical properties as well as PTCR and V-I characteristics can be used as an energy friendly ceramic heater or ohmic-contact electrode material through SPS.
 Keywords
Spark Plasma Sintering (SPS);Positive Temperature Coefficient Resistance (PTCR);V-I characteristics;Thermal image;Energy friendly ceramic heater;Ohmic-contact electrode material;
 Language
English
 Cited by
1.
SiC-ZrB2복합체의 특성에 미치는 SPS의 압력영향,이정훈;진범수;신용덕;

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Effects of SPS Mold on the Properties of Sintered and Simulated SiC-ZrB2Composites, Journal of Electrical Engineering and Technology, 2013, 8, 6, 1474  crossref(new windwow)
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Effects of Pressure on Properties of SiC-ZrB2Composites through SPS, The Transactions of The Korean Institute of Electrical Engineers, 2011, 60, 11, 2083  crossref(new windwow)
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