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  • Other Sources  (3)
  • 2000-2004  (3)
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  • 1
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    Micro-Raman Analysis of Irradiated Diamond Films (2003)
    In:  CASI
    Details
    Publication Date: 2018-06-12
    Description: Owing to its unique and robust physical properties, diamond is a much sought after material for use in advanced technologies, even in Microelectromechanical Systems (MEMS). The volume and weight savings promised by MEMS-based devices are of particular interest to spaceflight applications. However, much basic materials science research remains to be completed in this field. Results of micro-Raman analysis of proton (10(exp 15) - 10(exp 17) H(+)/sq cm doses) irradiated chemical vapor deposited (CVD) films are presented and indicate that their microstructure is retained even after high radiation exposure.
    Keywords: General
    Type: 5th Conference on Aerospace Materials, Processes, and Environmental Technology; NASA/CP-2003-212931
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The Effects of Proton Radiation on the Structure of Diamond Films (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: Diamond possesses many of the sought after material properties desired in present day applications and is also quite radiation resistant. These characteristics make it an ideal candidate for insertion into MicroElectroMechanical Systems (MEMS) technologies, particularly for space-based applications. Most prior radiation studies investigated single crystal, bulk diamond specimens, not polycrystalline thin films. This investigation examined the microstructural effects of irradiating polycrystalline diamond films with various proton dosages (10(exp 15) - 10(exp 17) H+/sq cm). Scanning Electron Microscopy, micro-Raman Spectroscopy, and micro-X-ray Diffraction techniques were used to examine the effects as a function of depth. Strain values were calculated. Results indicate that the diamond lattice is retained, even at maximum irradiation levels. Polycrystalline silicon was also examined for comparative purposes.
    Keywords: Solid-State Physics
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Effects of Radiation on the Mechanical Properties of Polysilicon and Polydiamond thin Film (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Due to its many excellent properties, diamond is being explored as a material for MicroElectroMechanical Systems (MEMS). However, as is true in the case of silicon, a large amount of basic material characterization issues still warrant investigation. This paper presents preliminary results from charged particle irradiation of Chemical Vapor Deposited (CVD) polycrystalline diamond films. The films were simultaneously dosed to a level of 9.4 x l0(exp 13)/sq cm using 700 keV protons and 1 MeV electrons. The samples were then subject to cross-sectional nanoindention analysis and Raman spectroscopy. Polycrystalline silicon was also investigated for comparison purposes. The diamond was unaffected by the irradiation. However, the silicon did indicate a slight decrease in the Young's Modulus.
    Keywords: Nonmetallic Materials
    Type: ASTM Conference; Nov 15, 2000 - Nov 15, 2000; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
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