Observation of internal pulsed current flow through the ZnO specimen in the spark plasma sintering method
Observation of internal pulsed current flow through the ZnO specimen in the spark plasma sintering method
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DOI：
10.1007/s10853-008-2906-5
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发表时间：
2009-03-01
影响因子：
4.5
通讯作者：
Fujita, Hiroharu
中科院分区：
文献类型：
--
作者：
Misawa, Tatsuya;Shikatani, Noboru;Fujita, Hiroharu
在放电等离子烧结(SPS)中，假设有一部分大的脉冲烧结电流流入试件并影响其烧结行为。为了阐明在SPS过程中流经样品的内部脉冲电流的影响，使用铂电极测量了样品的电阻，并使用磁探针成功地观察到了氧化锌和其他材料烧结过程中的内部脉冲电流。通过碳模将两个铂电极安装在氧化锌样品的侧面，并观察到随着烧结过程的进行，电阻减小。在SPS过程中流过样品的内部电流为数百安培，内部电流与总电流的比率取决于材料和SPS工艺的进展。
In spark plasma sintering (SPS), it is supposed that a part of the large pulsed sintering current flows into the specimen and affects the sintering behavior. To clarify the influence of the internal pulsed current that flows through the specimen during SPS, measurement of the electrical resistance of the specimen was conducted using Pt electrodes and the internal pulsed current was successfully observed using a magnetic probe during the sintering of ZnO and other materials. Two Pt electrodes were installed on the sides of a ZnO sample through a carbon die, and decrease of electrical resistance was observed with the progress of sintering. The internal current that flows through the specimen during SPS was several hundred ampere, and the ratio of the internal current to the total current was found to be dependent on the material and the progress of SPS process.