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Author Petley, Vijay ♦ Sathishkumar, S. ♦ Thulasi Raman, K. H. ♦ Rao, G. Mohan ♦ Chandrasekhar, U.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ BCC LATTICES ♦ BINARY ALLOY SYSTEMS ♦ CHROMIUM COMPOUNDS ♦ CRYSTALLIZATION ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRON MICROSCOPY ♦ FCC LATTICES ♦ FIBERS ♦ HARDNESS ♦ MAGNETRONS ♦ MICROSTRUCTURE ♦ NICKEL COMPOUNDS ♦ REDUCTION ♦ SOLID SOLUTIONS ♦ SPUTTERING ♦ SUBSTRATES ♦ SURFACES ♦ THIN FILMS ♦ X-RAY DIFFRACTION
Abstract Highlights: • Ni–Cr thin films of varied composition deposited by DC magnetron co-sputtering. • Thin film with Ni–Cr: 80–20 at% composition exhibits most distinct behavior. • The films were tensile tested and exhibited no cracking till the substrate yielding. - Abstract: Ni–Cr alloy thin films have been deposited using magnetron co-sputtering technique at room temperature. Crystal structure was evaluated using GIXRD. Ni–Cr solid solution upto 40 at% of Cr exhibited fcc solid solution of Cr in Ni and beyond that it exhibited bcc solid solution of Ni in Cr. X-ray diffraction analysis shows formation of (1 1 1) fiber texture in fcc and (2 2 0) fiber texture in bcc Ni–Cr thin films. Electron microscopy in both in-plane and transverse direction of the film surface revealed the presence of columnar microstructure for films having Cr upto 40 at%. Mechanical properties of the films are evaluated using nanoindentation. The modulus values increased with increase of Cr at% till the film is fcc. With further increase in Cr at% the modulus values decreased. Ni–Cr film with 20 at% Ni exhibits reduction in modulus and is correlated to the poor crystallization of the film as reflected in XRD analysis. The Ni–Cr thin film with 80 at% Ni and 20 at% Cr exhibited the most distinct columnar structure with highest electrical resistivity, indentation hardness and elastic modulus.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 66


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