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Diffusion Bonding of Metal/Ceramic Interfaces — A Model Study at The Nb/Al2O3 Interfaces

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Ceramic Microstructures ’86

Part of the book series: Materials Science Research ((MSR,volume 21))

Abstract

Mechanisms which lead to a perfect bonding of the interface between Nb and Al2O3 are studied by utilizing the following techniques. The surfaces of a Nb single or polycrystal are prepared so that geometrically well-defined line-shaped defects (about 10 µm wide and 1 µm deep) are introduced. Those Nb crystals are diffusion bonded to polished flat single or polycrystals of Al2O3 under well-defined conditions (temperature, time, oxygen partial pressure, loading, cooling rate). The change of the geometry is analyzed after decohesion of the partially bonded interface. Mechanisms which lead to a closing of the flaws will be described. Bonding occured primarily in the areas of close contact between Al2O3 and Nb. Analytical electron microscopy studies reveal that Nb dissolves Al2O3 and the chemical compositions of near-interface regions can be determined. Theoretical considerations demonstrate that the Nb/Al2O3 interface stays morphologically stable (flat) for all possible bonding conditions. TEM and HREM studies allow the determination of the structure of interfaces to the atomic level.

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Author information

Authors and Affiliations

  1. Max-Planck-Institut fur Metallforschung, Institut fur Werkstoffwissenschaften, Seestrasse 92, 7000, Stuttgart 1, Germany

    M. Rühle, M. Backhaus-Ricoult, K. Burger & W. Mader

Authors
  1. M. Rühle
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  2. M. Backhaus-Ricoult
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  3. K. Burger
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  4. W. Mader
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Editor information

Editors and Affiliations

  1. Lawrence Berkeley Laboratory, University of California, Berkeley, Berkeley, California, USA

    Joseph A. Pask  & Anthony G. Evans  & 

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© 1987 Plenum Press, New York

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Rühle, M., Backhaus-Ricoult, M., Burger, K., Mader, W. (1987). Diffusion Bonding of Metal/Ceramic Interfaces — A Model Study at The Nb/Al2O3 Interfaces. In: Pask, J.A., Evans, A.G. (eds) Ceramic Microstructures ’86. Materials Science Research, vol 21. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1933-7_31

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  • DOI: https://doi.org/10.1007/978-1-4613-1933-7_31

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4612-9074-2

  • Online ISBN: 978-1-4613-1933-7

  • eBook Packages: Springer Book Archive

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