金属间化合物基层状复合材料Ti/Al_3Ti的腐蚀行为  

Corrosion behavior of metal-intermetallic laminate composite Ti/Al_3Ti

作　　者：王帅 韦宁霞 果春焕 刘郢[2] 孟国哲 姜风春 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院超轻材料与表面技术教育部重点实验室,哈尔滨150001 [2]南京大学现代工程和应用科学学院,南京210093

出　　处：《中国有色金属学报》2016年第7期1420-1426,共7页The Chinese Journal of Nonferrous Metals

基　　金：国防基础科研基金资助项目(B2420133004)~~

摘　　要：以TC4钛合金箔片和纯Al箔片为原料,采用真空热压烧结工艺制备单相金属间化合物Al_3Ti和金属间化合物基层状复合材料Ti/Al_3Ti。采用动电位极化曲线和交流阻抗谱等测试技术,研究对供货态的TC4、随炉热处理的TC4、单相金属间化合物Al_3Ti、金属间化合物基层状复合材料Ti/Al_3Ti在模拟海水环境下的腐蚀性能,并对腐蚀之后材料表面的形貌及腐蚀产物进行观察和标定,获得单相金属间化合物Al_3Ti和金属间化合物基层状复合材料Ti/Al_3Ti的耐海水腐蚀性能。结果表明:金属间化合物Al_3Ti的耐海水腐蚀性能比层状复合材料Ti/Al_3Ti的腐蚀性能要好,但腐蚀性能都比复合材料单元TC4合金的要差;层状复合材料海水浸泡的腐蚀产物主要分布在界面处,且有局部腐蚀现象出现。The monolithic intermetallic tri-aluminide Al3Ti and metal-intermetallic-laminate composite Ti/Al_3Ti 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.

关 键 词：金属间化合物 层状复合材料 腐蚀性能 电化学测试 

分 类 号：TG171[金属学及工艺—金属表面处理]