Sintering Mechanism of Two Spheres Forming a Homogeneous Solid Solubility Neck.
Sintering Mechanism of Two Spheres Forming a Homogeneous Solid Solubility Neck.
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两个球体形成均质固溶度颈的烧结机制。
DOI：
10.1252/kakoronbunshu.28.202
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发表时间：
2002
影响因子：
0.4
通讯作者：
J. Hidaka
中科院分区：
文献类型：
--
作者：
A. Shimosaka;Yasushi Ueda;Y. Shirakawa;J. Hidaka
提出了一种烧结初期的模拟方法，以了解烧结条件对两种不同尺寸和成分的颗粒烧结行为的影响。本研究采用了均匀固溶体系的Cu-Ni。采用两个球形Cu-Ni颗粒接触烧结的方法进行了烧结实验，并通过SEM和EDX对烧结颗粒进行了观察。经证实，烧结颗粒总是形成弯曲的颈部，并且铜是颈部中的主要成分。所提出的模拟方法，其中修改了相同的组成的两个粒子的模型，涉及几个质量传输机制：表面扩散，体积扩散，晶界扩散，蒸发冷凝和，新的，晶粒生长。采用该方法对Cu-Ni颗粒的烧结行为进行了模拟，模拟结果与实验结果吻合较好。研究还发现，晶粒生长是不可忽略的，在初始阶段的烧结，收缩和晶粒生长敏感的烧结条件。因此，通过对模拟结果的分析，可以了解两种不同组成的球形颗粒的烧结机理，并确定最佳烧结条件。
A simulation method for initial-stage sintering was proposed to understand the ef fect of sintering conditions on the sintering behavior of two particles of dif ferent sizes and compositions. This study employed a homogeneous solid solubility system of Cu-Ni. The sintering experiments were performed with two spherical Cu-Ni particles in contact, and the sintered particles were observed by SEM and EDX. It was confirmed that the sintered particles always form a curved neck and copper was the dominant component in the neck. The proposed simulation method, in which the model for two particles of identical composition was modified, involves several mass transport mechanisms: surface dif fusion, volume dif fusion, grain-boundary dif fusion, evaporation-condensation and, newly, grain growth. The sintering behavior of Cu-Ni particles was simulated using the proposed method and the results were highly similar to the experimental results. It was also found that grain growth was not negligible in initial-stage sintering, and that shrinkage and grain growth responded sensitively to sintering conditions. Consequently, by analysis of these simulation results, it is possible to understand the mechanism of sintering two spherical particles of dif ferent compositions and to determine the optimum sintering conditions.