Abstract
The computer simulation was performed to confirm distribution of current and power density according to inner diameter of graphite mold of SPS(Spark Plasma Sintering). When the inner diameters of a graphite mold are varied 10㎜Φ, 20㎜Φ, 30㎜Φ and 40㎜Φ, the more the inner diameter of graphite mold is decreased, the more the current density of punch section is increased. Because the electrical resistivity of the SiC-ZrB₂ specimen section(7.77×10?⁴ Ωㆍ㎝) was lower than the electrical resistivity(6.00×10?³ Ωㆍ㎝) of graphite section, the current density and power density of specimen section was higher than those of graphite section. It is considered that a SiC-ZrB₂ composite is sintered by more Joule heat of specimen section than that of mold and punch section. The current and power density distribution of a SiC-ZrB₂ composite can be predicted through computer simulation when SPS is conducted, and an electrical resistivity of the SiC-ZrB₂ composite is main element of SPS.
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