(1. 重慶理工大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400054；
2. 重慶理工大學(xué) 重慶市模具重點(diǎn)實(shí)驗(yàn)室，重慶 400054；
3. 重慶理工大學(xué) 藥學(xué)與生物工程學(xué)院，重慶 400054)
摘 要: 表面張力對(duì)于材料而言是一種關(guān)鍵性的性質(zhì)，該性能在液態(tài)金屬和合金的成分設(shè)計(jì)領(lǐng)域有著十分重要的地位，其對(duì)鑄造以及鍵合絲鍵合時(shí)金屬凝固過(guò)程中表面是否開(kāi)裂、焊接后焊接處的微觀形貌有著決定性的影響。使用Butler模型和Toop模型分別計(jì)算金銀銅及其對(duì)應(yīng)二元合金在熔融狀態(tài)下的表面張力并與實(shí)驗(yàn)值進(jìn)行對(duì)比，從而為金銀鍵合絲的成分設(shè)計(jì)起到一定的指導(dǎo)作用。結(jié)果表明：采用Butler模型和Toop模型計(jì)算出二元以及三元合金的表面張力與實(shí)驗(yàn)值相差較小。在1381 K下，Ag-Au-Cu三元合金表面張力隨Au和Cu含量變化介于0.89392~1.32471 N/m之間，表面張力隨Ag或者Cu含量增加呈現(xiàn)單調(diào)減小或單調(diào)增大的趨勢(shì)。
關(guān)鍵字: Ag-Au-Cu合金；表面張力；Butler模型；Toop模型
（1.College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;
2. Chongqing Key Laboratory of Mould, Chongqing University of Technology, Chongqing 400054, China;
3. College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, China）
Abstract:The surface tension is a key property for materials. This property plays an important role in the field of composition design of liquid metals and alloys. It plays a decisive role in the surface cracking during solidification and the micro-morphology of welded joints after welding. The Butler model and Toop model were used to calculate the surface tension of Au, Ag, Cu and their corresponding binary alloys in melting state, respectively, and the results were compared with the experimental values, so as to play a guiding role in the composition design of Au-Ag bonding wires. The results show that the surface tensions of binary and ternary alloys are calculated by Butler model and Toop model, which differs little from the experimental values. The surface tensions of Ag-Au-Cu ternary alloy vary from 0.89392 N/m to 1.32471 N/m with the change of Au and Cu content at 1381 K. The surface tensions decrease or increases monotonously with the increases of Ag or Cu content.
Key words: Ag-Au-Cu alloy; surface tension; Butler model; Toop model
