Nanolayered TiN/NbN multilayers as new superhard materials
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
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| Title |
Nanolayered TiN/NbN multilayers as new superhard materials
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| Creator |
Barshilia, Harish C
Rajam, KS |
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| Subject |
Composite Materials
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| Description |
We have deposited nanolayered multilayer coatings of TiN/NbN on silicon and tool steel substrates using a reactive DC magnetron sputtering process. Judicious control of process parameters enabled to deposit stoichiometric TiN/NbN coatings. The bilayer thickness, also known as modulation wavelength (), critically affected the properties of the coatings. Coatings deposited at 150 Å 30 Å exhibited superlattice structure in XRD data. 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 850°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.
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| Publisher |
Society for Advancement of Heat Treatment and Surface Engineering
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| Date |
2003
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| Type |
Conference or Workshop Item
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/9833/1/ASTRA.pdf
Barshilia, Harish C and Rajam, KS (2003) Nanolayered TiN/NbN multilayers as new superhard materials. In: International conference on advances in surface treatment: research and application, November 4, 2003, Hotel Viceroy, Hyderabad. |
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| Relation |
http://nal-ir.nal.res.in/9833/
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