Sc对Al/Fe层状复合材料界面化合物生长行为的影响  

Effect of Sc on growth behavior of interface compounds of Al/Fe layered composites

作　　者：王振[1] 高坤元[1] 张小军[1] 聂祚仁[1] 黄晖[1] 吴晓蓝 Wang Zhen;Gao Kunyuan;Zhang Xiaojun;Nie Zuoren;Huang Hui;Wu Xiaolan(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124

出　　处：《金属热处理》2024年第1期84-90,共7页Heat Treatment of Metals

基　　金：国家重点研发计划(2022YFB3705802)。

摘　　要：采用SEM、EDS等手段研究了铝侧添加Sc元素对Al/Fe复合界面金属间化合物的生长、种类及组织形貌的影响。结果表明,冷轧复合的Al/Fe复合板在475~640℃退火1 h后均产生了连续的界面化合物,在560℃及以下时,金属间化合物厚度变化趋势基本一致,在560℃以上时,含Sc的复合板界面金属间化合物增长趋势明显变缓,厚度大幅降低,这表明Al侧添加Sc元素不能完全抑制界面金属间化合物的产生。同时,Sc元素的添加并未改变界面化合物的种类及分布,界面化合物从Al侧到Fe侧依次为FeAl_(3)、Fe_(2)Al_(5)、FeAl。在475℃时,Fe侧Fe_(2)Al_(5)相呈细小的锯齿状形貌,但整体十分平整,在580℃时,Fe侧Fe_(2)Al_(5)相呈粗大“指状”形貌,起伏较大。Effect of Sc element on the growth,type and micromorphology of intermetallic compounds at the Al/Fe composite interface was studied by means of SEM,EDS and other methods.The results show that the cold⁃rolled composite Al/Fe composite plates produce continuous interfacial compounds after annealing at 475⁃640℃for 1 h,and the change trend of intermetallic compound thickness at 560℃and below is basically the same,but above 560℃,the growth trend of intermetallic compounds at the interface of Sc⁃containing composite plates slows down significantly,and the thickness is greatly reduced.This indicates that the addition of Sc elements on the Al side does not completely inhibit the production of intermetallic compounds at the interface.At the same time,the addition of Sc elements does not change the type and distribution of interface compounds,which are FeAl_(3),Fe_(2)Al_(5) and FeAl from Al side to Fe side.The Fe_(2)Al_(5) phase at Fe side is finely jagged when annealed at 475℃,but the whole morphology is very flat,however,it becomes coarse finger⁃like morphology and uneven when annealed at 580℃.

关 键 词：铝/铁复合 微合金化 金属间化合物 

分 类 号：TG146.21[一般工业技术—材料科学与工程]