(1. 哈爾濱工程大學(xué) 材料科學(xué)與化學(xué)工程學(xué)院
超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，哈爾濱 150001；
2. 南京大學(xué) 現(xiàn)代工程和應(yīng)用科學(xué)學(xué)院，南京 210093)
摘 要: 以TC4鈦合金箔片和純Al箔片為原料，采用真空熱壓燒結(jié)工藝制備單相金屬間化合物Al3Ti和金屬間化合物基層狀復(fù)合材料Ti/Al3Ti。采用動(dòng)電位極化曲線和交流阻抗譜等測試技術(shù)，研究對供貨態(tài)的TC4、隨爐熱處理的TC4、單相金屬間化合物Al3Ti、金屬間化合物基層狀復(fù)合材料Ti/Al3Ti在模擬海水環(huán)境下的腐蝕性能，并對腐蝕之后材料表面的形貌及腐蝕產(chǎn)物進(jìn)行觀察和標(biāo)定，獲得單相金屬間化合物Al3Ti和金屬間化合物基層狀復(fù)合材料Ti/Al3Ti的耐海水腐蝕性能。結(jié)果表明:金屬間化合物Al3Ti的耐海水腐蝕性能比層狀復(fù)合材料Ti/Al3Ti的腐蝕性能要好，但腐蝕性能都比復(fù)合材料單元TC4合金的要差；層狀復(fù)合材料海水浸泡的腐蝕產(chǎn)物主要分布在界面處，且有局部腐蝕現(xiàn)象出現(xiàn)。
關(guān)鍵字: 金屬間化合物；層狀復(fù)合材料；腐蝕性能；電化學(xué)測試
（1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education,
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China）
Abstract:The monolithic intermetallic tri-aluminide Al3Ti and metal-intermetallic-laminate composite Ti/Al3Ti were synthesized by Ti and Al foils using vacuum sintering process. The corrosion behaviors of TC4 alloys with and without heat treatment, monolithic intermetallic Al3Ti alloy and metal-intermetallic-laminate composite Ti/Al3Ti in marine environments were studied using potentiodynamic polarization curve, AC impedance. The surface morphologies and corrosion products of these materials were observed and analyzed，the corrosion-resistance monolithic intermetallic tri-aluminide Al3Ti and metal-intermetallic-laminate composite Ti/Al3Ti were obtained. The experimental results show that the monolithic intermetallic tri-aluminide Al3Ti has a good corrosion resistance comparing with the laminated composite Ti/Al3Ti, while their corrosion resistances are both poor than that of TC4 alloy. The corrosion products mainly distribute at the interface, and a local corrosion is found to occur in the metallic intermetallic laminate composite in marine environments.
Key words: intermetallic compound; laminar composite; corrosion resistance; electrochemical testing
