The Cu-Sn phase dia- gram part II: new thermodynamic assessment. Intermetallics 2013;34: 148e58.Li D, Franke P, Fu¨ rtauer S, Cupid D, Flandorfer H (2013) The Cu-Sn phase diagram part II: New thermody- namic assessment. Intermetallics 34: 148-158....
Phase diagram investigation of the Cu–Sn system was carried out on twenty Cu-rich samples by thermal analysis (DTA), metallographic methods (EPMA/SEM-EDX) and crystallographic analysis (powder XRD, high temperature powder XRD). One main issue in this work was to investigate the high temperature...
The 15th National Conference of Phase Diagrams of China and Multilateral Symposium 011 Phase Diagrams and Materials Design Cu.Sn二元系统相图的第一性原理研究 周伟,穆文凯,刘卫芳,刘立娟,吴萍 (天津大学理学院物理系,天津300072) 摘要:Sn基合金是目前微电子封装领域使用的的主要材料,但目前对于二元Cu-Sn系统研...
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Fig.1 The schematic diagram of fabricating joints 在240 ℃温度和1 N的压力下分别对Cu/Sn+Sn/Cu 结构钎焊 30,60,90,120,150,180,210,240,360,480 min,然后对每个时间下的焊点进行金相制样,通过SEM(scanning electron microscope)分析组织演变规律. ...
图1.1Sn.Pb二元相图 Fig.1-1Sn-Pbbinaryphasediagram1.1.2Sn.Pb钎料的危害性 随着科学技术的快速发展,人们对自身的健康意识日益增强,同时对环 境保护的意识也越加重视。目前电子产品更新换代的节奏日益加快,电子垃 圾已成为困扰全球的大问题。由于存在技术、经济上的困难,且铅回收时会 西南科技大学硕士研究生学位...
Phase diagram Cu–Sn redrawn after Knödler[55](compare Fig.1(a)) depicting in red the composition ranges within which certain types of products are obtained upon quenching β or γ phase to –183 °C and reheating to ambient temperature, at which PXRD analysis has been performed. These ...
图1 焊料合金的XRD谱图Fig.1 XRD diagram of the solder alloy 图2 Sn-Cu二元相图Fig.2 Binary phase diagram for Sn-Cu 由图2可以看到,虚线为共晶成分点(Sn-0.7Cu)从熔融状态缓慢冷却,当冷却到1点时,到达共晶点,开始析出β-Sn和Cu6Sn5,即 L↔β-Sn+Cu6Sn5, 结合相图,根据杠杆原理计算,此时 w(β...
2.3. Nanoparticles phase diagram modeling When the nanoparticle is assumed to be an isotropic spherical particle, the Gibbs energy of the surface GSurfaceis expressed by [17]:(9)GSurface=2σVrwhere V is the molar volume, r is the radius of the particles, and σ is the surface tension. ...
Roshanghias A, Vrestal J, Yakymovych A, Richter KW, Ipser H (2015) Sn-Ag-Cu nanosolders: melting behavior and phase diagram pre- diction in the Sn-rich corner of the ternary system. CALPHAD 49: 101-109. https://doi.org/10.1016/j.calphad.2015.04.003...