Analysis of Kinetics of Diffusion Induced Recrystallization in Fe Phase of Cu/Fe/Cu Diffusion Couples

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概要

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• Combining the columnar-geometry and boundary-diffusion model by Li and Hillert with the energy balance model by Kajihara and Gust, a new kinetic equation has been obtained to describe the growth rate of the alloyed region due to diffusion induced recrystallization (DIR) in a solution phase of binary systems. The equation has been utilized to analyze quantitatively the kinetics of DIR in the Fe(Cu) system observed by the present authors using Cu/(Fe-4.8 mass%)/Cu diffusion couples. The notation Fe(Cu) means that Cu atoms diffuse into a pure Fe or binary Fe-Cu phase. The observations indicate that the thickness l of the DIR region formed in the Fe phase from each interface increases with increasing annealing time t according to the relationship l=1.58×10-6(t/t0)0.29 at 1323 K. Here, l and t are measured in m and s, respectively, and t0 is unit time, 1 s. Using the mobility M as the fitting parameter of the kinetic equation, we have obtained the value of M=8.64×10-13 m4/J s and the relationship l= 1.08×10-6(t/t0)0.33 on the basis of the observations. Through the analysis, it is concluded that l increases in proportion to √t  for DIR in a pure metal whereas l increases proportionately with 3√t  for DIR in a solution phase even with a low solute concentration.

• 社団法人 日本鉄鋼協会の論文
• 1997-09-15

著者

• KAJIHARA Masanori

  Department of Materials Science and Engineering, Tokyo Institute of Technology

• Kajihara Masanori

  Department Of Materials Science And Engineering Tokyo Institute Of Technology

• Mori T

  Faculty Of Engineering Himeji Institute Of Technology

• Mori Tsutomu

  Department Of Materials Science And Engineering The Graduate School Of Science And Engineering Tokyo

• Kajihara M

  Tokyo Inst. Technol. Yokohama Jpn

• KAWANAMI Yasuhiko

  Graduate Student, Tokyo Institute of Technology

• KAWANAMI Yasuhiko

  Tokyo Institute of Technology, Nagatsuta

• Kawanami Yasuhiko

  Tokyo Institute Of Technology Nagatsuta

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