Electric current dependence of plastic flow behavior with large tensile elongation in tetragonal zirconia polycrystal under a DC field
Electric current dependence of plastic flow behavior with large tensile elongation in tetragonal zirconia polycrystal under a DC field
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直流场下四方氧化锆多晶大拉伸塑性流动行为的电流依赖性
DOI：
10.1016/j.scriptamat.2020.113659
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发表时间：
2021
影响因子：
6
通讯作者：
Yoshida Hidehiro
中科院分区：
文献类型：
--
作者：
Sasaki Yamato;Morita Koji;Yamamoto Takahisa;Soga Kohei;Masuda Hiroshi;Yoshida Hidehiro
本文系统地研究了致密化四方氧化锆多晶(TZP)中塑性流动行为与直流电流的关系。因此，我们观察到了拉伸延性的最佳电流密度。当电流密度为2 5 0 mA∙mm−2，炉温为1 0 0℃，初始应变速率为1×10−3s−1时，延伸率达到135%。焦耳加热和外加电流效应相结合，加速了扩散传质，降低了流动应力，改善了塑性。
This study systematically investigated the electric direct current (DC) dependence of the plastic flow behavior in a densified tetragonal ZrO2polycrystal (TZP). Consequently, we observed an optimal current density for tensile ductility. The maximum elongation of 135% was achieved under the current density of 250 mA∙mm−2at a furnace temperature of 1000°C and an initial strain rate of 1 × 10−3s−1. The diffusional mass transport in the TZP was accelerated by the combination of Joule heating and applied current effect, resulting in a reduced flow stress and an improved ductility.