镀锡银钎料扩散过渡区生长建模及数值分析

中国机械工程

镀锡银钎料扩散过渡区生长建模及数值分析

王星星1;韩林山1;乔培新2;李权才1

1.华北水利水电大学机械学院，郑州，450045
2.机械科学研究总院先进制造技术研究中心，北京，100083

出版日期:2017-06-10 发布日期:2017-06-13
基金资助:
河南省自然科学基金资助项目（162300410191）；
河南省高等学校重点科研项目（17A430021）；
华北水利水电大学博士基金资助项目

Growth Modeling and Numerical Analysis of Diffusion Transition Zone for Silver Brazing Alloys with Tin Coatings

WANG Xingxing1;HAN Linshan1;QIAO Peixin2;LI Quancai1

1.School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450045
2.Advanced Manufacture Technology Center, China Academy of Machinery Science & Technology, Beijing,100083

Online:2017-06-10 Published:2017-06-13

摘要/Abstract

摘要： 采用温度梯度法对镀锡银钎料进行热扩散处理，形成了扩散过渡区。借助金相显微镜（OM）、原子力显微镜（AFM）对扩散过渡区的厚度、表界面形貌进行分析研究，发现热扩散处理加快了Sn原子的扩散速度，使得Sn原子在银钎料中的浓度升高，扩散过渡区的厚度增加。以Sn原子在镀锡银钎料扩散过渡区的浓度变化为研究对象，由Fick定律建立了扩散过渡区总厚度的数学模型，借助Arrehenius方程对其参数进行数值分析；利用MATLAB软件和扩散过渡区厚度的试验数据对所建模型进行求解，得到了200℃、220℃镀锡银钎料扩散过渡区Sn原子生长的本构方程。试验结果证实所建本构方程在一定程度上可定量表征镀锡银钎料扩散过渡区Sn原子的生长规律。

关键词: 镀锡银钎料, 扩散过渡区, 本构方程, 热扩散

Abstract: The silver brazing filler metals with tin coatings were thermal diffused using temperature gradient method, then it would occur diffusion transition zone during the silver brazing filler metals with tin coatings. The thickness and surface morphology of diffusion transition zone were analyzed by optical microscope and atomic force microscope. The results show that the diffusion rate of Sn atom is accelerated by the thermal diffusion method and the concentration of tin atom during the silver brazing alloys is increased. The thickness of diffusion transition zone is also increased. According to the object for the concentration gradient of diffusion transition zones, the mathematical model for the thickness of diffusion transition zone was established and numerical analyzed by Arrehenius equation. The model was solved by MATLAB software and the experimental data of diffusion transition zone. The constitutive equations for growth behavior of Sn atoms during diffusion transition zone at 200℃ and 220℃ were established. The experimental results indicate that constitutive equation may quantitative analyze the growth behavior of Sn atoms at the diffusion transition zones for silver brazing alloy with tin coating.

Key words: silver brazing alloy with tin coating, diffusion transition zone, constitutive equation, thermal diffusion

中图分类号:

王星星, 韩林山, 乔培新, 李权才. 镀锡银钎料扩散过渡区生长建模及数值分析[J]. 中国机械工程.

WANG Xingxing, HAN Linshan, QIAO Peixin, LI Quancai. Growth Modeling and Numerical Analysis of Diffusion Transition Zone for Silver Brazing Alloys with Tin Coatings[J]. China Mechanical Engineering.

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