(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室，蘭州 730050；
2. 蘭州工業(yè)學(xué)院 材料工程學(xué)院，蘭州 730050)
摘 要: 采用平衡潤濕法在290~310 ℃條件下研究純Sn、SAC307、Sn-0.7Cu這3種軟釬料分別與Co73Si10B17非晶箔帶晶化前后的潤濕行為。通過對表面能和潤濕力的測量、對合金體系的表面狀態(tài)和潤濕性進(jìn)行表征。結(jié)果表明：Co基合金的表面自由能遠(yuǎn)小于其本征值，表明其表面存在氧化膜；釬料的潤濕性隨著Sn含量的增加而升高，表明該體系潤濕機(jī)理是一系列復(fù)雜的氧化膜去除反應(yīng)且界面處反應(yīng)潤濕較為劇烈；Co73Si10B17合金的潤濕性受界面反應(yīng)產(chǎn)物和材料表面氧化膜的影響較大，但最終的潤濕性由表面氧化膜的去除程度決定。
關(guān)鍵字: 釬料；潤濕性；氧化膜；可焊性
（1. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China）
Abstract:Using wetting balance method, the wettability of Co73Si10B17 in amorphous and crystalline states by Sn and Sn-based lead-free solders (pure Sn, Sn-0.7Cu, Sn-0.3Ag-0.7Cu) were studied in the temperature range of 290-310 ℃. The surface state and wettability of different systems were represented by measuring the surface energy and wetting force. The results show that oxide films exist in Co-based alloys surface because its surface free energy is less than the intrinsic value. The wettability of the Sn-based solder is enhanced with increasing the Sn content. Thus, the wetting mechanism is a series of complex multiple reactions of removing oxide film and it is exceedingly strong. The final wettability of Co73Si10B17 is affected by the interfacial reaction product and surface oxide film, but it is determined by the degree of removal of the oxide film.
Key words: solder; wettability; oxide film; joining
