Metal Immiscibility Route to Synthesis of Ultrathin Carbides, Borides, and Nitrides
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 08, 2017
- Source ID
- 10.1002/adma.201700364
Entities
People
- Abhisek K. Singh
- Atanu Samanta
- Chandra Sekhar Tiwary
- Kamanio Chattopadhyay
- Prafull Pandey
- Praveena Manimunda
- Pulickel Ajayan
- Sanjay Kashyap
- Soham Chattopadhyay
- Suman Sarkar
- Syed Asif
- Vidya Kochat
- Xiang Zhang
- Zixing Wang
Organizations
- Air Force Office of Scientific Research
- BML Munjal University
- Indian Institute of Science, Bengaluru
- Rice University
- United States Department of Defense