累积叠轧制备多层TiAl_(3)化合物动力学研究  

Study on Kinetics of Multilayer TiAl_(3) Compound Prepared by Accumulative Roll-bonding

作　　者：邱星宇 方红梅 曹丽丽 杨登科 叶岳松 QIU Xingyu;FANG Hongmei;CAO Lili;YANG Dengke;YE Yuesong(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China)

机构地区：[1]浙江科技学院机械与能源工程学院,浙江杭州310023

出　　处：《材料开发与应用》2023年第6期52-57,62,共7页Development and Application of Materials

摘　　要：利用差示扫描量热法、X射线衍射和扫描电子显微镜研究累积叠轧制备Ti/Al多层的固相反应,揭示了累积叠轧制备Ti/Al多层生成TiAl_(3)相的动力学特征。轧制后金属多层的DSC曲线中含有两个放热峰,外形与通过三极管磁控溅射沉积Ti/Al薄膜获得的DSC曲线非常相似,两个放热峰分别代表了Ti/Al多层中TiAl_(3)相的成核和增厚过程。为了更好地了解TiAl_(3)相的成核情况,用累积叠轧制备的Ti/Al多层进行等温DSC试验,并结合JMA模型进行比较分析,建立了基于溅射沉积薄膜反应中相形成动力学模型的修正模型,使得根据修正模型计算出的DSC曲线更加贴合试验得到的DSC曲线。结果显示:在累积叠轧制备的Ti/Al多层中,TiAl_(3)相的成核和横向生长以及层增厚的动力学特征,可以通过基于溅射沉积薄膜反应中相形成动力学模型的修正模型来解释。The solid phase reaction of the Ti/Al multilayers prepared by accumulative roll-bonding is studied by differential scanning calorimetry,X-ray diffractometer and scanning electron microscope.The kinetic characteristics of the TiAl_(3) phase formation in the Ti/Al multilayers prepared by accumulative roll bonding are revealed.The DSC curve obtained by testing the rolled sample according to the differential scanning calorimetry method contains two exothermic peaks,and the shape is very similar to the DSC curve obtained by the magnetron sputtering of Ti/Al films.The two exothermic peaks represent the nucleation of TiAl_(3) phase and the thickening of the TiAl_(3) phase layer in the ARB Ti/Al multilayers,respectively.In order to better understand the nucleation of the TiAl_(3) phase,the isothermal DSC test is carried out on the Ti/Al multilayer samples prepared by ARB.The JMA model is comparison and analysis,and a modified model based on the kinetics of phase formation in the deposition film reaction is established,which makes the DSC curve calculated more consistent with the actual measured DSC curve.The results show that in the Ti/Al multilayer samples prepared by ARB,the kinetic characteristics of the nucleation,lateral growth and subsequent thickening of the TiAl_(3) phase can be explained by the modified kinetics model of the phase formation in the process of sputtering deposition of films.

关 键 词：累积叠轧 TiAl_(3)相 金属间化合物 差示扫描量热法 

分 类 号：TG337.6[金属学及工艺—金属压力加工]