Microstructural and mechanical characteristics of Ni–Cr thin films

Petley, Vijay; Sathishkumar, S.; Thulasi Raman, K. H.; Rao, G. Mohan; Chandrasekhar, U.

doi:10.1016/J.MATERRESBULL.2015.02.002

Title: Microstructural and mechanical characteristics of Ni–Cr thin films

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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 filmmore »« less

Authors:

Petley, Vijay ^[1]; Sathishkumar, S.; Thulasi Raman, K. H.; Rao, G. Mohan ^[2]; Chandrasekhar, U. ^[1]

Gas Turbine Research Establishment, DRDO, Bangalore 93 (India)
Department of Instrumentation and Applied Physics, IISc, Bangalore 12 (India)

Publication Date:: Mon Jun 15 00:00:00 EDT 2015

OSTI Identifier:: 22475787

Resource Type:: Journal Article

Journal Name:: Materials Research Bulletin

Additional Journal Information:: Journal Volume: 66; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408

Country of Publication:: United States

Language:: English

Subject:: 36 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

Citation Formats


                    Petley, Vijay, Sathishkumar, S., Thulasi Raman, K. H., Rao, G. Mohan, and Chandrasekhar, U. Microstructural and mechanical characteristics of Ni–Cr thin films.  United States: N. p., 2015. 
        Web.  doi:10.1016/J.MATERRESBULL.2015.02.002.

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                    Petley, Vijay, Sathishkumar, S., Thulasi Raman, K. H., Rao, G. Mohan, & Chandrasekhar, U. Microstructural and mechanical characteristics of Ni–Cr thin films.  United States.  https://doi.org/10.1016/J.MATERRESBULL.2015.02.002

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                    Petley, Vijay, Sathishkumar, S., Thulasi Raman, K. H., Rao, G. Mohan, and Chandrasekhar, U. 2015.  
        "Microstructural and mechanical characteristics of Ni–Cr thin films".  United States.  https://doi.org/10.1016/J.MATERRESBULL.2015.02.002.

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@article{osti_22475787,

  title        = {Microstructural and mechanical characteristics of Ni–Cr thin films},

  author       = {Petley, Vijay and Sathishkumar, S. and Thulasi Raman, K. H. and Rao, G. Mohan and Chandrasekhar, U.},

  abstractNote = {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.},

  doi          = {10.1016/J.MATERRESBULL.2015.02.002},

  url          = {https://www.osti.gov/biblio/22475787},
  journal      = {Materials Research Bulletin},

  issn         = {0025-5408},

  number       = ,

  volume       = 66,

  place        = {United States},

  year         = {Mon Jun 15 00:00:00 EDT 2015},

  month        = {Mon Jun 15 00:00:00 EDT 2015}

}

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