Abstract
This chapter discusses the discharge phenomena and effect of pulse condition in pulsed current sintering. Discharge phenomena occurred by using aluminum powder and a BN die set instead of a normal graphite die set. Using the BN die set, high voltage is applied to the powder compact and the discharge condition is satisfied. The effect of pulse current on an interface temperature is investigated by thermal-image-analyzing with Al balls of 10mm in diameter. The temperature of the interface between two balls is larger than that of the body. The difference between the interface and the body temperature decreased with increasing the pulse frequency. The temperature difference in pulse current is higher than that in DC. Pulsed current sintering (PCS) is known by the name of spark plasma sintering (SPS) can sinter many kinds of powder in a high heating rate, for example to 1000K for 180s.
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