| Al/Ti扩散层形成的扩散溶解机制 |
| |
| 引用本文： | 宋玉强,马圣东,李世春.Al/Ti扩散层形成的扩散溶解机制[J].焊接学报,2014,35(6):49-52,89. |
| |
| 作者姓名： | 宋玉强 马圣东 李世春 |
| |
| 作者单位： | 中国石油大学(华东)解放军总装备部材料界面实验室; |
| |
| 基金项目： | 国家自然科学基金资助项目(50371059) |
| |
| 摘 要： | 分别在铝组元熔点之下和之上对Al/Ti镶嵌式扩散偶进行退火热处理,形成固-固和固-液扩散偶.利用光学显微镜、扫描电子显微镜和电子探针显微分析仪观察和分析Al/Ti固-固和固-液扩散层的形态和结构,并对其形成微观机理进行了研究.结果表明,Al/Ti固-固扩散层由一层TiAl3构成;固-液扩散层由TiAl3单相层与TiAl3和Al(Ti)固溶体双相层两层构成,双相层TiAl3和Al(Ti)固溶体的形态自铝向钛呈现规律性变化.Al/Ti固-固TiAl3扩散层和固-液TiAl3单相层的形成都是铝扩散溶解到钛中形成以钛为溶剂的Al-Ti固溶体结晶形成的;而Al/Ti固-液TiAl3和Al(Ti)固溶体双相层是钛先溶解再扩散到液态铝中形成的Al-Ti液溶体结晶形成的.铝液中Ti原子浓度自铝向钛逐渐升高,导致了双相层TiAl3和Al(Ti)固溶体形态的规律性变化.
|
| 关 键 词： | 扩散焊 扩散层 扩散 溶解 结晶 |
| 收稿时间： | 2013/1/16 0:00:00 |
Diffusion and dissolve mechanism of Al/Ti diffusion layer formation |
| |
| SONG Yuqiang,MA Shengdong and LI Shichun.Diffusion and dissolve mechanism of Al/Ti diffusion layer formation[J].Transactions of The China Welding Institution,2014,35(6):49-52,89. |
| |
| Authors: | SONG Yuqiang MA Shengdong and LI Shichun |
| |
| Affiliation: | Liberation Army Chief Equipment Ministry Laboratory of Material Interface, China University of Petroleum, Qingdao 266580, China,Liberation Army Chief Equipment Ministry Laboratory of Material Interface, China University of Petroleum, Qingdao 266580, China and Liberation Army Chief Equipment Ministry Laboratory of Material Interface, China University of Petroleum, Qingdao 266580, China |
| |
| Abstract: | Al/Ti diffusion couple made by inlaying was annealed under and above Al melting point, respectively, and solid-solid and solid-liquid diffusion couples were formed. the microstructure of Al/Ti solid-solid and solid-liquid diffusion layers were observed by OM and SEM-EDS, and the formation mechanism was investigated. The results show that Al/Ti solid-solid diffusion layer was composed by one layer of TiAl3 But the solid-liquid diffusion layer was composed of single phase layer of TiAl3 and dual-phase layer of TiAl3+Al(Ti) solid solution. The formation of dual-phase layer changed regularly from Al to Ti. The Al/Ti solid-solid TiAl3 diffusion layer and solid-liquid single-phase TiAl3 layer were formed from diffusion of Al into Ti by forming AI-Ti solid solution with Ti as solvent. However, dual-phase layer TiAl3+Al(Ti) solid solution formed by dissolving and spread of Ti to the liquid Al by forming Al-Ti liquid solution. It resulted in morphological variation of dual-phase layer TiAl3+Al(Ti) solid solution that Ti atom concentration gradually increased in Al solution from Al to Ti. |
| |
| Keywords: | diffusion layer diffusion welding diffusion dissolve crystal |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《焊接学报》浏览原始摘要信息 |
|
点击此处可从《焊接学报》下载全文 |
|
