Experimental and numerical analysis of the initial stage of field-assisted sintering of metals
Experimental and numerical analysis of the initial stage of field-assisted sintering of metals
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DOI：
10.1007/s10853-016-0444-0
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发表时间：
2017-02
影响因子：
4.5
通讯作者：
A. Semenov;J. Trapp;M. Nöthe;O. Eberhardt;T. Wallmersperger;B. Kieback
中科院分区：
文献类型：
--
作者：
A. Semenov;J. Trapp;M. Nöthe;O. Eberhardt;T. Wallmersperger;B. Kieback
对镍、钢和铜球形颗粒进行了实验和数值模拟，研究了粉末场激活/辅助烧结过程中接触形成的初始阶段。接触电阻和颈部形成过程中由于熔化/烧结在两个到三个粒子系统下的一个单一的高电流脉冲从电容器放电的实验研究结果进行比较与完全耦合的热电有限元模拟的结果。以镍球为例，数值分析了颗粒尺寸、触头几何形状和电负载对脉冲放电过程中温度和温度梯度分布的影响。材料本身的影响进行比较镍，钢，铜系统。
The initial stage of contact formation during field-activated/assisted sintering of powders is investigated experimentally and numerically for spherical particles of nickel, steel, and copper. The results of experimental studies of the contact resistance and the neck formation process due to melting/sintering in two- to three-particle systems under a single high-current pulse from a capacitor discharge are compared with results of fully coupled thermo-electrical finite-element simulations. The impact of particle size, contact geometry, and electrical load on the temperature and temperature gradient distribution during the pulse discharge is analyzed numerically for nickel spheres. The influence of the material itself is compared for nickel, steel, and copper systems.