扩散连接Al/Ni/0Cr18Ni9Ti复合材料的界面组织  

Investigation into Intermetallic Compounds in Al/Ni/0Cr18Ni9Ti Diffusion Bonded Joint

作　　者：成小乐[1] 高义民[1] 邢建东[1] 廖熠[1] 尹敏[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《西安交通大学学报》2007年第7期867-869,874,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50471034)

摘　　要：选取纯Ni箔作过渡层,采用真空热压扩散工艺,在加热温度480℃、压力10 MPa、真空度1.0×10-2Pa的工艺条件下,制备了变形铝合金2024和不锈钢0Cr18Ni9Ti双金属复合材料.利用扫描电子显微镜、能谱仪、X射线衍射仪和显微硬度仪等测试分析方法,对双金属复合材料的2个连接界面及基体进行了组织、性能分析.结果表明:不锈钢/纯Ni界面形成了宽约8μm的互扩散区,但其过渡区无金属间化合物生成;Al/Ni界面生成了宽约4μm的扩散过渡区,过渡区的相组成为金属间化合物Al3Ni2、Al3Ni及Al3Ni5.Choosing pure nickel foil as the transition layer, Al/0Cr18Ni9Ti bimetallic composite is prepared with the vacuum warm compaction diffusion method under the condition of 480℃ compaction temperature, 10 MPa pressure and 1.0 × 10^- 2 Pa vacuum. The structures and performances of the two bimetallic composite bonding interfaces and matrix are analyzed respectively with scanning electron microscope, X-ray diffractometer and Vickers microhardness scale. It is found that under the condition of diffusion bonding, three kinds of intermetallic compounds, Al3Ni2、Al3Ni and Al3Ni5, form in the Al/Ni interface less than 4 μm in thickness; and no intermetallic compound forms in the Ni/0Crl8Ni9Ti diffusion zone with about 8 μm in thickness.

关 键 词：复合材料 金属间化合物 界面 扩散连接 

分 类 号：TB331[一般工业技术—材料科学与工程]