Abstract
Diffusion couples of Al2O3 single-crystal, sapphire, and Nb polycrystal were heat-treated in the temperature range 1873 to 2073 K under pressure in the range 3 to 15.2 MN m−2 for various times up to 3.6×103 sec. Tensile testing at various temperatures up to 1873 K in a vacuum of about 10−3 Pa, Knoop hardness testing at room temperature, optical microscopy, scanning electron microscopy, transmission electron microscopy, and electron-probe X-ray microanalysis studies were carried out on the specimens. From the results, it was concluded that the fairly high bond strength of a Al2O3-Nb interface might be attributed to the formation of a thin NbO x layer, which had grown epitaxially on the Al2O3 surface. Lattice matching between Al2O3 and NbO x phases was also considered.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
G. Elssner and G. Petzow, Z. Metallkde. 64 (1973) 280.
G. Elssner, R. Pabst and J. Puhr-Westerheide. Z. Werkstofftechnik 5 (1974) 61.
G. Elssner, S. Riedel and R. Pabst, Praktische Metallographie 12 (1975) 234.
R. Pabst and K. D. Mörgentbaler, Z. Werkstofftechnik 7 (1976) 62.
G. Brauer, H. Müller and G. Kühner, J. Less-Common Metals 4 (1962) 533.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Morozumi, S., Kikuchi, M. & Nishino, T. Bonding mechanism between alumina and niobium. J Mater Sci 16, 2137–2144 (1981). https://doi.org/10.1007/BF00542374
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00542374