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TEM analysis of diffusion brazement microstructure in a Ni3Al-based intermetallic alloy

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Abstract

Transmission electron microscopy study of brazed joint microstructure in a Ni3Al-based intermetallic alloy IC 6 was performed. A continuously distributed microconstituents consisting of γ solid-solution, M3B2-type and M23B6-type borides, which were likely formed by eutectic-type reaction(s) from residual liquated insert during cooling from brazing temperature, were observed along the joint centreline. Consideration of possible incipient melting due to eutectic-type transformation reaction of these phases is pertinent to development of post braze heat treatment for modifying the brazement microstructure.

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Acknowledgements

Financial support from Natural Sciences and Engineering Research Council of Canada (NSERC) is gratefully acknowledged. Thanks also due to Dr. Y. F. Han of Beijing Institute of Aerospace Materials for providing alloy IC 6.

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Authors and Affiliations

  1. National Institute for Nanotechnology, Edmonton, T6G 2M9, Canada

    H. R. Zhang

  2. Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 5V6, Canada

    A. Ghoneim & O. A. Ojo

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  1. H. R. Zhang
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  2. A. Ghoneim
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  3. O. A. Ojo
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Correspondence to O. A. Ojo.

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Zhang, H.R., Ghoneim, A. & Ojo, O.A. TEM analysis of diffusion brazement microstructure in a Ni3Al-based intermetallic alloy. J Mater Sci 46, 429–437 (2011). https://doi.org/10.1007/s10853-010-4884-7

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  • DOI: https://doi.org/10.1007/s10853-010-4884-7

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