金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 98-102.DOI: 10.13251/j.issn.0254-6051.2021.07.019

• 材料研究 • 上一篇    下一篇

Ni-Al-W活性材料的界面扩散动力学

于江涵1, 耿铁强2, 李文1, 朱正旺2, 张海峰2   

  1. 1.沈阳理工大学 材料科学与工程学院, 辽宁 沈阳 110159;
    2.中国科学院 金属研究所, 辽宁 沈阳 110016
  • 收稿日期:2020-12-15 出版日期:2021-07-25 发布日期:2021-12-10
  • 通讯作者: 李 文,教授,博士,E-mail:liwen@sylu.edu.cn
  • 作者简介:于江涵(1995—),男,硕士研究生,主要研究方向为含能金属材料的制备及性能,E-mail:1160232228@qq.com。

Interfacial diffusion kinetics of Ni-Al-W active materials

Yu Jianghan1, Geng Tieqiang 2, Li Wen 1, Zhu Zhengwang2, Zhang Haifeng 2   

  1. 1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang Liaoning 110159, China;
    2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang Liaoning 110016, China
  • Received:2020-12-15 Online:2021-07-25 Published:2021-12-10

摘要: 采用粉末冶金法制备Ni-Al-W活性材料Ni37.5Al42.5W20,研究了材料中Ni-Al、Al-W、Ni-W 3种不同界面处的扩散动力学。结果表明:在400 ℃保温不同时间下该材料表观激活能变化不大;扩散层厚度Δx随时间t的增加而增加,且lnΔx与lnt呈线性关系,在3种不同界面处只发生了扩散而未产生金属间化合物。Ni-Al界面层厚度与保温时间关系式为ΔxNi-Al=4.5210-8t1/2.635,界面扩散方式为晶格扩散中的体扩散机制;Al-W界面层厚度与保温时间关系式为ΔxAl-W=9.5610-8t1/4.050,界面扩散方式为表面扩散机制;Ni-W界面层厚度与保温时间关系式为ΔxNi-W=2.3310-7t1/6.534,界面扩散方式为表面扩散机制。

关键词: Ni-Al-W活性材料, 粉末冶金, 界面扩散, 生长动力学, 表观活化能

Abstract: Ni-Al-W active material Ni37.5Al42.5W20 was prepared by powder metallurgy method, and the diffusion kinetics of Ni-Al, Al-W and Ni-W interfaces in the material were studied. The results show that the apparent activation energy of the material has little change when annealing at 400 ℃ for different time. The thickness of diffusion layer Δx increases with the increase of time t, and lnΔx has a linear relationship with lnt, but no intermetallic compounds are produced. The relationship between the Ni-Al interface layer thickness and annealing time is ΔxNi-Al=4.5210-8t1/2.635, the interface diffusion mode is volume diffusion in lattice. The relationship between the Al-W interface layer thickness and annealing time is ΔxAl-W=9.5610-8t1/4.050, the interface diffusion mode is surface diffusion. The relationship between the Ni-W interface layer thickness and annealing time is ΔxNi-W=2.3310-7t1/6.534, the interface diffusion mode is surface diffusion.

Key words: Ni-Al-W active material, powder metallurgy, interfacial diffusion, growth kinetics, apparent activation energy

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