Fe-Al金属间化合物基叠层复合材料的界面表征及生长动力学研究  

Interface characterization and study on growth kinetics of Fe-Al metal-intermetallic-laminate composites

作　　者：满婷 魏振雄 苏喜喜 祖国胤 MAN Ting;WEI Zhenxiong;SU Xixi;ZU Guoyin(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819

出　　处：《有色金属材料与工程》2023年第1期24-30,共7页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51874087,52011530020)。

摘　　要：将SUS441不锈钢薄板和1060纯铝薄板交替叠放后,经“轧制复合—合金化退火”工艺制得Fe-Al金属间化合物基叠层(Fe-Al metal-intermetallic-laminate,Fe-Al MIL)复合材料。采用光学显微镜(optical microscope,OM)、扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射仪(X-ray diffractometer,XRD)等设备测试了不同热处理制度下Fe-Al MIL复合材料的界面微观组织形貌、物相组成及化合物生长行为。结果表明:在640℃退火时,均匀层的主要物相为Fe_(2)Al_(5),且有原子分数为5%~6%的Cr固溶于该均匀层;在高于640℃退火时,除由Fe_(2)Al_(5)相组成的均匀层之外,化合物层还出现了明显的由Fe_(4)Al_(13)相和Cr_(2)Al_(13)相组成的两相层,且两相层交界处有Al_(5.50)Cr_(1.95)Fe_(2.55)相析出;金属间化合物的厚度随退火温度的升高及时间的延长而增加,Fe_(2)Al_(5)相的生长规律满足抛物线法则,其生长激活能为192.28 kJ/mol。The Fe-Al metal-intermetallic-laminate(Fe-Al MIL)composites were prepared by alternately stacking SUS441 stainless steel sheets and 1060 pure aluminum sheets following the"rolling claddingalloying annealing"technology.The equipments,such as optical microscope(OM),scanning electron microscope(SEM),and X-ray diffractometer(XRD),were used to investigate the interfacial microstructure,phase composition,and compound growth behavior of Fe-Al MIL composite under different heat treatment regimes.The results show that the main phase of the uniform layer annealing at 640℃ is Fe_(2)Al_(5),and 5%-6% of Cr is solidly dissolved in the uniform layer.When the annealing temperature is higher than 640℃,in addition to the uniform layer composed of Fe_(2)Al_(5),a two-phase layer composed of Fe_(4)Al_(13)and Cr_(2)Al_(13)phases appears in the compound layer,and Al_(5.50)Cr_(1.95)Fe_(2.55)phase precipitates at the interface of two-phase layer.The thickness of the intermetallic compound increases with the increase of heat treatment temperature and time,and the growth law of the Fe_(2)Al_(5)phase satisfies the parabolic law with a growth activation energy of 192.28 kJ/mol.

关 键 词：金属间化合物基叠层复合材料 轧制复合 界面 金属间化合物 生长动力学 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]