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张志娟,张兵,尚筱迪,王秋雨.Ti/Ni多层复合材料界面扩散行为的研究[J].稀有金属材料与工程(英文),2019,47(3):923~930.[zhangzhijuan,zhangbing,shangxiaodi and wangqiuyu.Study on the Diffusion Behavior of Ti/Ni Multilayer Composites[J].Rare Metal Materials and Engineering,2019,47(3):923~930.]
Study on the Diffusion Behavior of Ti/Ni Multilayer Composites
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Received:July 17, 2017  Revised:September 15, 2017
Key words: Ti/Ni multilayer composites  Heat treatment  Interface diffusion behavior  Dynamics theory
Foundation item:国家自然科学基金项目(51541404);镍钴资源综合利用国家重点实验室开放课题(301170504);西安建筑科技大学基础研究基金项目(JC1507)
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zhangzhijuan,zhangbing,shangxiaodi and wangqiuyu  
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      In this paper, the sample of Ti/Ni multilayered composites fabricated by 5 cycles ARB were treated with different heat treatment. The microstructure, interface structure and the thickness of Ti/Ni interface diffusion layer were analyzed by the optical microscope(OM) and scanning electron microscopy (SEM) analysis technology, combined with the dynamic theory to study the diffusion behavior of Ti/Ni interface. The results show that the Ti/Ni interface did not diffusion during accumulative roll bonding processes. After heat treatment with(550 ℃-750 ℃)×(0.5 h-8 h), the Ti/Ni interface occurred diffusion, the thickness of diffusion layer was power function within the experimental time, the thickness is exponential function relation with temperature. With the increase of heat treatment temperature, the growth of Ti - Ni diffusion layer was controlled by the body diffusion under 650 ℃ gradually transformed into grain boundary diffusion controlled. Through the calculation and verification we can get the dynamics equation of reaction layer growth of Ti/Ni interface of Ti/Ni multi-layer structure composite material produced by 5 cycles accumulative roll bonding is:y=1.7043*104*exp(-78202/RT) *t1.2009-0.0008T .