How the tin concentration affects the interactions of intermetallic compounds of the Cu-Sn system with liquid gallium and a gallium-tin eutectic
摘要:
Interactions in the copper-gallium-tin ternary system are studied. New phase formation involves the step of dissolution of solid copper alloys in a liquid phase. The induction period of tin segregation in an autonomous phase depends on tin concentration in the feed. The formation of solid solution of gallium in tin is suggested.
the antiperovskite compound. The doped Mn2.8T0.2SnC (T = Cr, Fe, Co, Ni and Cu) compounds show a distinctly different magnetic behavior which can be related to electronic filling of the d band of the transition metal atom. While Cr and Fedoped Mn3SnC show properties similar to that of Mn3SnC, the Co, Ni and Cu doped compounds exhibit nucleation of secondary phases which are devoid of carbon and having
摘要 研究过渡金属掺杂的Mn3SnC 的结构和磁性能,旨在了解过渡金属原子对反钙钛矿化合物磁结构性能的影响。掺杂的 Mn2.8T0.2SnC(T = Cr、Fe、Co、Ni 和 Cu)化合物显示出明显不同的磁性行为,这可能与过渡金属原子的 d 带的电子填充有关。虽然 Cr 和 Fe 掺杂的 Mn3SnC 表现出与 Mn3SnC 相似的特性,但 Co、Ni 和 Cu 掺杂的化合物表现出二次相的成核,这些次相不含碳并具有 Heusler 和 DO19 型六方结构。
Preparation of Cu-Sn Layers on Polymer Substrate by Reduction-Diffusion Method Using Ionic Liquid Baths
A novel metallization of non-conductive epoxy substrate with Cu-Sn "speculum alloy," or "white bronze," was performed through successive electrochemical processes: (i) conventional electroless deposition of pure Cu layer and (ii) subsequent electrochemical alloying of the resulting pure Cu layer with Sn using an ionicliquid bath at 150°C, a medium-low temperature. Availability of the Sn quasi-reference
通过连续的电化学过程使用 Cu-Sn“镜合金”或“白青铜”对非导电环氧树脂基材进行新型金属化:(i)纯铜层的常规化学沉积和(ii)随后的电化学合金化使用离子液体浴在 150°C(中低温)下得到含有 Sn 的纯铜层。验证了用于合金化的 Sn 准参比电极的可用性,并检查了所得的由 Cu 6 Sn 5 和/或 Cu 3 Sn 金属间相组成的致密且粘性的 Cu-Sn 层作为镀镍的替代物。发现两种金属间相的丰度取决于合金化电位和持续时间,并根据 Cu-Sn 系统的合金形成热力学进行了讨论。
Electrochemical Alloying of Copper Substrate with Tin Using Ionic Liquid as an Electrolyte at Medium-Low Temperatures
alloying of Cu substrates through a reduction-diffusionmethod was investigated using an ionicliquid, trimethyl-n-hexylammonium bis[(trifluoromethyl)sulfonyl]amide, as a solvent for an electrolytic bath. The use of the ionicliquid made it possible to raise the processing temperature beyond 100°C and form the Cu-Snlayers faster than with an aqueous media. The layers obtained from a Cu thin layer under a
使用离子液体三甲基-正己基铵双[(三氟甲基)磺酰基]酰胺作为电解槽的溶剂,研究了通过还原-扩散法对Cu基板进行电化学合金化。使用离子液体可以将加工温度提高到 100°C 以上,并且比使用水性介质更快地形成 Cu-Sn 层。在恒电位条件下从 Cu 薄层获得的层是由 Cu 6 Sn 5 、Cu 3 Sn 和 Cu 10 Sn 3 金属间相组成的银灰色镜金属,而在电接触条件下制备的层涉及 β-Sn相含有微量铜。从合金形成热力学的角度讨论了每个 Cu-Sn 相的形成。
Calorimetric study of the energetics and kinetics of interdiffusion in Cu/Cu<sub>6</sub>Sn<sub>5</sub> thin‐film diffusion couples
作者:K. F. Dreyer、W. K. Neils、R. R. Chromik、D. Grosman、E. J. Cotts
DOI:10.1063/1.114596
日期:1995.11.6
Differential scanning calorimetry was used to characterize the energetics and kinetics of interdiffusion in solder/metal diffusion couples. The heat of formation of Cu3Sn from Cu6Sn5 and Cu thin films was found to be ΔHr=−4.3±0.3 kJ/mol, similar to the results of previous measurements on bulk samples. We have seen that the nucleation of Cu3Sn begins at temperatures near 360 K, but that the nucleation
On the mechanism of the binary Cu/Sn solder reaction
作者:J. Görlich、G. Schmitz、K. N. Tu
DOI:10.1063/1.1852724
日期:2005.1.31
The solder reaction of Cu and molten pure Sn is studied by scanning and transmission electron microscopy. Similar as reported for SnPb solder, the intermetallic Cu6Sn5 product is formed in a scallop-like morphology and a growth kinetic proportional to the cube root of time is found. Size distributions and shape of the scallops are determined experimentally. Comparing the binary reaction couple Cu/Sn with the technical combination Cu/SnPb, a significant difference in the length to width aspect ratio of individual scallops is noticed. We demonstrate by transmission electron microscopy that neighbored scallops are not separated by channels of solder, but by grain boundaries. Thus, grain boundary transport is the rate controlling step and the observed variation in scallop shape is due to differences in the interface tensions of the two reaction couples.