TY - JOUR
T1 - Metal Immiscibility Route to Synthesis of Ultrathin Carbides, Borides, and Nitrides
AU - Wang, Zixing
AU - Kochat, Vidya
AU - Pandey, Prafull
AU - Kashyap, Sanjay
AU - Chattopadhyay, Soham
AU - Samanta, Atanu
AU - Sarkar, Suman
AU - Manimunda, Praveena
AU - Zhang, Xiang
AU - Asif, Syed
AU - Singh, Abhisek K.
AU - Chattopadhyay, Kamanio
AU - Tiwary, Chandra Sekhar
AU - Ajayan, Pulickel M.
N1 - Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/8/4
Y1 - 2017/8/4
N2 - 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.
AB - 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.
KW - borides
KW - nitrides
KW - oxidation resistance
KW - scratch resistance
KW - transition-metal carbides
KW - ultrathin materials
UR - http://www.scopus.com/inward/record.url?scp=85020275325&partnerID=8YFLogxK
U2 - 10.1002/adma.201700364
DO - 10.1002/adma.201700364
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C2 - 28593718
AN - SCOPUS:85020275325
SN - 0935-9648
VL - 29
JO - Advanced Materials
JF - Advanced Materials
IS - 29
M1 - 1700364
ER -