Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (4): 293-300.DOI: 10.11890/1006-7191-104-293

• 研究论文 • 上一篇    下一篇

Growth kinetics of titanium boride layers on the surface of Ti6Al4V

李凤华1,樊占国2,衣晓红3,张景垒4,龚殿婷4   

  1. 1. 东北大学
    2. 东北大学材料与冶金学院
    3. 东北大学 冶金资源综合利用与环境
    4.
  • 收稿日期:2009-12-31 修回日期:2010-04-01 出版日期:2010-08-25 发布日期:2010-08-11
  • 通讯作者: 李凤华

Growth kinetics of titanium boride layers on the surface of Ti6Al4V

Fenghua LI1, Xiaohong YI1, Jinglei ZHANG1,Zhanguo FAN1, Dianting GONG2, Zhengping XI3   

  1. 1. School of Material & Metallurgy,Northeastern University, Shenyang 110819, China
    2. Vocational Technology College, Liaoning Shihua University, Fushun 113001, China
    3. Northwest Institute for Non-ferrous Metal Research, Xi'an 710016, China
  • Received:2009-12-31 Revised:2010-04-01 Online:2010-08-25 Published:2010-08-11
  • Contact: Fenghua LI

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关键词: 渗硼, 固体粉末法, Ti6Al4V合金, 动力学, 扩散

Abstract:

Dual titanium boride layers consisting of continuous TiB2  top-layer and TiB whisker sub- layer were formed on the surface of Ti6Al4V alloy using powder-pack boriding technique. An iso-thickness diagram of the whole boride layer was fitted with the data of thickness of the coating, treatment time and process temperature using Sigma Plot10.0 software. Growth kinetics of the titanium boride layer were analyzed by measuring the extent of penetration of  TiB2 and TiB whisker as a function of boriding time in the range of 5-20 h and boriding temperature in the range of 1000 - 1100 ℃. By the linear regression analysis of growth kinetics of titanium boride layer, the diffusivity K and average diffusion activation energy (Q) of boron atoms in Ti6Al4V alloy were calculated, respectively.

Key words: Boriding, Powder-pack method, Ti6Al4V alloy, Kinetics, Diffusion