ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00542374
