Phase Field Modeling of Microstructure Formation, DSC Curves, and Thermal Expansion for AgCu Brazing Fillers Under Reactive Air Brazing Conditions
Phase Field Modeling of Microstructure Formation, DSC Curves, and Thermal Expansion for AgCu Brazing Fillers Under Reactive Air Brazing Conditions
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DOI：
10.1002/adem.201400101
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发表时间：
2014-12
影响因子：
3.6
通讯作者：
M. Apel;G. Laschet;B. Böttger;R. Berger
中科院分区：
文献类型：
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作者：
M. Apel;G. Laschet;B. Böttger;R. Berger
我们讨论了在空气下接近反应空气钎焊 (RAB) 的条件下 Ag-Cu 钎焊填料微观结构演变的相场模拟。模拟显示了钎料在凝固过程中相形成的基本步骤，并提供了计算的 DSC 曲线，可以直接比较模拟和实验。事实证明，考虑传输过程（主要是氧气）对于测量差示扫描量热（DSC）曲线的定量解释是必要的。此外，模拟还证明了不同 Cu 含量对微观结构和相应 DSC 曲线的影响。最后，计算两相微观结构的有效温度相关热膨胀，包括相变产生的本征应变。
We discuss phase field simulations of the microstructure evolution in an Ag–Cu brazing filler for conditions close to reactive air brazing (RAB) under air. The simulations show the basic steps of the phase formation in the brazing filler during solidification and provide calculated DSC curves, which allow a direct comparison between simulation and experiment. It is demonstrated that the consideration of transport processes (mainly oxygen) is necessary for a quantitative interpretation of measured differential scanning calorimetry (DSC) curves. Furthermore, simulations demonstrate the effect of different Cu‐contents on the microstructure and the corresponding DSC curves. Finally, the effective temperature‐dependent thermal expansion including the eigenstrain from the phase transformation is calculated for the two‐phase microstructure.