Abstract
Ultrathin ceramic coatings are of high interest as protective coatings from aviation to biomedical applications. Here, a generic approach of making scalable ultrathin transition metal-carbide/boride/nitride using immiscibility of two metals is demonstrated. Ultrathin tantalum carbide, nitride, and boride are grown using chemical vapor deposition by heating a tantalum-copper bilayer with corresponding precursor (C2H2, B powder, and NH3). The ultrathin crystals are found on the copper surface (opposite of the metal–metal junction). A detailed microscopy analysis followed by density functional theory based calculation demonstrates the migration mechanism, where Ta atoms prefer to stay in clusters in the Cu matrix. These ultrathin materials have good interface attachment with Cu, improving the scratch resistance and oxidation resistance of Cu. This metal–metal immiscibility system can be extended to other metals to synthesize metal carbide, boride, and nitride coatings.
Original language | English |
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Article number | 1700364 |
Journal | Advanced Materials |
Volume | 29 |
Issue number | 29 |
DOIs | |
State | Published - 4 Aug 2017 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Funding
This work was funded by the Air Force Office of Scientific Research (AFOSR) award BAA-AFOSR-2013-0001. C.S.T. and P.M.A. acknowledge the funding support from U.S. Department of Defense: U.S. Air Force Office of Scientific Research for the Project MURI: “Synthesis and Characterization of 3D Carbon Nanotube Solid Networks” Award No. FA9550-12-1-0035.
Funders | Funder number |
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U.S. Department of Defense | |
Air Force Office of Scientific Research | BAA-AFOSR-2013-0001, FA9550-12-1-0035 |
Keywords
- borides
- nitrides
- oxidation resistance
- scratch resistance
- transition-metal carbides
- ultrathin materials