Investigation on Sintering Mechanism of Nanoscale Tungsten Powder Based on Atomistic Simulation
Investigation on Sintering Mechanism of Nanoscale Tungsten Powder Based on Atomistic Simulation
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DOI：
10.1063/1.3457516
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
A. Moitra;Sungho Kim;Seong-Gon Kim;S. Park;R. German;M. Horstemeyer
中科院分区：
文献类型：
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作者：
A. Moitra;Sungho Kim;Seong-Gon Kim;S. Park;R. German;M. Horstemeyer
原子模拟侧重于在亚微观水平上的结晶钨粉的烧结进行揭示在纳米粉末的加工。在这些烧结模拟过程中计算了颈部生长和收缩，因此可以将这些结果扩展到通过烧结的全局物理性能演变。计算了烧结过程中的致密化和晶粒生长随温度、压力、颗粒构型、添加剂和颗粒之间的晶体错位的变化。这些发现奠定了一个虚拟的方法来设置适用于纳米级粉末的加工周期和材料设计的基础。
Atomistic simulations focusing on sintering of crystalline tungsten powders at the submicroscopic level are performed to shed light on the processing on the nanoscale powders. The neck growth and shrinkage were calculated during these sintering simulations, so it is possible to extend these results to the global physical property evolution via sintering. The densification and grain growth during sintering were calculated with variations in temperature, pressure, particle configuration, additives, and crystalline misalignment between particles. These findings lay a foundation for a virtual approach to setting the processing cycles and materials design applicable to nanoscale powders.