Abstract
The formation and growth of intermetallic compounds by reactive diffusion between model alloy Ni30-Cu70 (composition given in at.%) and high purity Ti was investigated at a temperature of 850 °C using bulk diffusion couples for 100 h. Only three stable intermediate compounds of the Ni30Cu70-Ti system were formed in the diffusion reaction zone in the sequence Ti2Cu, TiNi and τ1 (Ti(Ni1−xCux)2. Moreover, on the microstructure the two phase zone consisting of TiNi2Cu + Ni30Cu70 can be observed. Next to the experimental description, a model determining the diffusion path in a multiphase system was proposed. The proposed model is based on mass conservation law and geometrical lemmas, that allow for the determination of the unique diffusion path in complicated systems.
Published Version
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