(吉林大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)春 130025)
摘 要: 用掃描電鏡和電子探針研究了Al共晶接觸反應(yīng)釬焊液相的潤(rùn)濕行為，以分步法觀察Cu在Al表面的潤(rùn)濕鋪展過(guò)程，并運(yùn)用熱力學(xué)參數(shù)分析Al共晶接觸反應(yīng)釬焊機(jī)理。結(jié)果表明，Cu原子可以沿Al的晶界優(yōu)先擴(kuò)散，達(dá)到共晶成分后形成液相， 實(shí)現(xiàn)Al的共晶接觸反應(yīng)釬焊。
關(guān)鍵字: 鋁； 釬焊； 共晶反應(yīng)
（College of Materials Science and Engineering,
Jilin University, Changchun 130025, P.R.China）
Abstract:The wetting behavior of liquid phase for Al eutectic reaction brazing was studied using SEM and EDX.A step-by-step approach was used to observe the spreading of Cu on Al on eutectic condition.The mechanism of Al eutectic reaction brazing was analyzed using thermodynamical parameters. The results show that the Cu on the grain boundary of base metal Al must come from the the solid atoms through diffusion of Cu. After the eutectic ingredients are accumulated, a binary low melting point eutectic substance is formed at the grain boundary, and the eutectic reaction brazing of Al is formed.
Key words: aluminum; brazing; eutectic reaction
