Molecular dynamics simulation of mechanical deformation of ultra-thin amorphous carbon films

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Amorphous carbon films approximately 20nm thick are used throughout the computer industry as protective coatings on magnetic storage disks. The structure and function of this family of materials at the atomic level is poorly understood. Recently. we simulated the growth of a:C and a:CH films 1 to 5 nm thick using Brenner`s bond-order potential model with added torsional energy terms. The microstructure shows a propensity towards graphitic structures at low deposition energy (<leV) and towards higher density and diamond-like structures at higher deposition energy (>20eV). In this paper we present simulations of the evolution of this microstructure for the dense ... continued below

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7 p.

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Glosli, J.N.; Philpott, M.R. & Belak, J. April 1, 1995.

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Amorphous carbon films approximately 20nm thick are used throughout the computer industry as protective coatings on magnetic storage disks. The structure and function of this family of materials at the atomic level is poorly understood. Recently. we simulated the growth of a:C and a:CH films 1 to 5 nm thick using Brenner`s bond-order potential model with added torsional energy terms. The microstructure shows a propensity towards graphitic structures at low deposition energy (<leV) and towards higher density and diamond-like structures at higher deposition energy (>20eV). In this paper we present simulations of the evolution of this microstructure for the dense 20eV films during a simulated indentation by a hard diamond tip. We also simulate sliding, the tip across the surface to study dynamical processes like friction, energy transport and microstructure evolution during sliding.

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7 p.

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OSTI as DE95016591

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  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 17-21 Apr 1995

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  • Other: DE95016591
  • Report No.: UCRL-JC--119515
  • Report No.: CONF-950412--37
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 102465
  • Archival Resource Key: ark:/67531/metadc618958

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  • April 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2016, 2:36 p.m.

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Glosli, J.N.; Philpott, M.R. & Belak, J. Molecular dynamics simulation of mechanical deformation of ultra-thin amorphous carbon films, article, April 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc618958/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.