放電プラズマ焼結プロセスにおける焼結試料の構造形成に対する試料内部電流の効果

概要

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To clarify the influence of internal pulsed current upon the sintering behavior of powder materials during spark plasma sintering processing, simultaneous measurement of internal current using magnetic probe was carried out. By magnetic probe measurement, the internal current that flows through the specimen during SPS process was several hundred ampere, and the ratio of the internal current to the total current was found to be dependent on the electrical conductivity, diameter of powder material and the progress of SPS process. The measurement and estimation of an internal pulsed current using a magnetic probe in the specimen is very useful for in situ observation of the sintering behavior during the SPS process. The XRD intensity of (002), (102) and (103) of ZnO nano-particles specimen was gradually decreased with the increase in the progress of SPS process, so, the preferential orientation in ZnO nano-powder occurred.
2009-12-15