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Role of Ti diffusion on the formation of phases in the Al2O3–Al2O3 brazed interface

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Abstract

Diffusivities of Ti, Cu, Al and Ag in the interface of Al2O3–Al2O3 braze joints using Ag–Cu–Ti active filler alloy, have been calculated by Matano–Boltzman method. The Matano plane has been identified for each elemental diffusion at various brazing temperatures. The diffusivities of Ag, Cu and Al are almost insignificant on formation of interface during brazing, whereas the diffusivity of Ti changes significantly with the brazing temperature and controls the formation of different reaction product in the interface. Presence of TiO and Ti3Cu3O phases in the interface has been confirmed by transmission electron microscopy (TEM).

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Acknowledgement

The authors thank Director, National Metallurgical Laboratory, Jashedpur for his kind permission to publish this paper. Partial financial support from Department of Science & Technology, India and Aeronautics Research & Development Board, India through Grant-in-aid sponsored projects is gratefully acknowledged. Authors are also thankful to Dr. L.C. Pathak, NML, Jamshedpur for his valuable suggestions.

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Authors and Affiliations

  1. Material Science and Technology Division, National Metallurgical Laboratory, Jamshedpur, 831 007, India

    Abhijit Kar, Sudipta Mandal, Rabindra N. Ghosh & Ajoy Kumar Ray

  2. Material Science and Technology Division, IIT Roorkee, Roorkee, 247 667, India

    Tamal K. Ghosh

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  1. Abhijit Kar
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  2. Sudipta Mandal
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  3. Rabindra N. Ghosh
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  4. Tamal K. Ghosh
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Correspondence to Ajoy Kumar Ray.

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Kar, A., Mandal, S., Ghosh, R.N. et al. Role of Ti diffusion on the formation of phases in the Al2O3–Al2O3 brazed interface. J Mater Sci 42, 5556–5561 (2007). https://doi.org/10.1007/s10853-006-1092-6

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  • DOI: https://doi.org/10.1007/s10853-006-1092-6

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