中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4407-4412.doi: 10.1088/1674-1056/18/10/050

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Phase-field simulation of the effect of interaction among ordered domains on interdiffusion in Ni--Al--Cr alloys

张玉祥, 王锦程, 杨玉娟, 杨根仓, 周尧和   

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2009-01-08 修回日期:2009-04-09 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 50401013) and the National Defense Pre-research Foundation of China (Grant No 9140A12020108HK0333).

Phase-field simulation of the effect of interaction among ordered domains on interdiffusion in Ni--Al--Cr alloys

Zhang Yu-Xiang(张玉祥), Wang Jin-Cheng(王锦程)†, Yang Yu-Juan(杨玉娟), Yang Gen-Cang(杨根仓), and Zhou Yao-He(周尧和)   

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2009-01-08 Revised:2009-04-09 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 50401013) and the National Defense Pre-research Foundation of China (Grant No 9140A12020108HK0333).

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摘要： The effect of interaction among γ ' ordered domains on the interdiffusion process in γ +γ ' /γ and γ +γ ' /γ +γ ' diffusion couples is investigated by using the phase-field method, in which bulk free energy and mobility are linked with thermodynamic and kinetic databases. Simulated results show that the interaction among γ ' ordered domains has great influence on the microstructure, the interdiffusion velocity and the volume fraction of γ ' phase on both sides of the diffusion couples.

Abstract: The effect of interaction among $\gamma'$ ordered domains on the interdiffusion process in $\gamma$ + $\gamma'$ /$\gamma$ and $\gamma$ +$\gamma'$ /$\gamma$ +$\gamma'$ diffusion couples is investigated by using the phase-field method, in which bulk free energy and mobility are linked with thermodynamic and kinetic databases. Simulated results show that the interaction among $\gamma'$ ordered domains has great influence on the microstructure, the interdiffusion velocity and the volume fraction of $\gamma'$ phase on both sides of the diffusion couples.

Key words: interdiffusion, phase-field method, ordered domain, Ni--Al--Cr

中图分类号:  (Chemical interdiffusion; diffusion barriers)

  • 66.30.Ny
65.40.G- (Other thermodynamical quantities) 81.30.Bx (Phase diagrams of metals, alloys, and oxides)