Barshilia, Harish C and Rajam, KS (2003) Nanolayered TiN/NbN Multilayers as New Superhard Materials. In: International Conference on Advances in Surface Treatment: Research amp; Applications(SMT XVII amp; IFHTSE), Hyderabad, India.
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Abstract
Nanolayered multilayer coatings of TiN/NbN on silicon and tool steel substrates were deposited using a reactive DC magnetron sputtering process. Judicious control of process parameters enabled the deposition of stoichiometric TiN/NbN coatings. The bilayer thickness, also known as modulation wavelength (L), critically affected the properties of the coatings. Coatings deposited at 150 xC5;13; x2265; L x2265; 30 xC5; exhibited superlattice structure as evidenced by XRD. Nanoindentation data indicated that polycrystalline TiN/NbN multilayers exhibited hardness as high as 4000 kg/mm2, which was 2 times the rule-of-mixtures value. Annealing of the coatings in vacuum indicated that coatings retained superlattice structure even up to 850xB0;C. Furthermore, the multilayer coatings showed a tremendous improvement in the corrosion resistance in 0.5 M HCl solution as compared to the single layer TiN and NbN coatings.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | Nanolayered TiN/NbN coatings;Nanoindentation data |
| Subjects: | CHEMISTRY AND MATERIALS > Chemistry and Materials (General) ENGINEERING > Engineering (General) |
| Division/Department: | Surface Engineering Division, Surface Engineering Division |
| Depositing User: | Mrs Neetu Chandra |
| Date Deposited: | 07 Jun 2006 |
| Last Modified: | 24 May 2010 09:41 |
| URI: | http://nal-ir.nal.res.in/id/eprint/1379 |
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