Amorphous solid systems: diamond-like carbon, carbides, films and multilayer structures
Diamond-like films (DLFs) may be considered as (1) a special kind of solid; (2) membranes with connected microscopic pores and (3) a matrix, the properties of which can be varied over a wide range by alloying. In W-Si alloyed DLFs all these structures are found, with resistances from 10 14 to 10 -4...
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Published in | Surface & coatings technology Vol. 48; no. 3; pp. 193 - 198 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
29.11.1991
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Diamond-like films (DLFs) may be considered as (1) a special kind of solid; (2) membranes with connected microscopic pores and (3) a matrix, the properties of which can be varied over a wide range by alloying. In W-Si alloyed DLFs all these structures are found, with resistances from 10
14 to 10
-4 ω cm. They are interesting as examples of percolation phenomena and for their possible practical applications. The expected pore diameter has been estimated at about 0.30-0.35 nm and the pore density at 10
21 cm
-3. However, scanning tunnelling microscopy gave evidence of negligible pore density and a metallic state in high tungsten films. Low angle electron and X-ray diffraction, scanning tunnelling microscopy, high voltage (1 MeV) transmission scanning electron microscopy (TSEM) and the analysis of the emissive picture of a W-edge coated with a DLF have demonstrated the presence of a uniform amorphous structure up to the equiatomic proportion C:W. A study has been made of the short-term and long-term temperature stability of DLFs and of their resistance to degradation and oxidation and of their chemical and mechanical durability. |
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ISSN: | 0257-8972 1879-3347 |
DOI: | 10.1016/0257-8972(91)90003-F |