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This content will become publicly available on October 23, 2018

Title: Radiation-Induced Damage and Recovery of Ultra-Nanocrystalline Diamond: Toward Applications in Harsh Environments

Ultra-nanocrystalline diamond (UNCD) is increasingly being used in the fabrication of devices and coatings due to its excellent tribological properties, corrosion resistance, and biocompatibility. Here in this work, we study its response to irradiation with kiloelectronvolt electrons as a controlled model for extreme ionizing environments. Real time Raman spectroscopy reveals that the radiation-damage mechanism entails dehydrogenation of UNCD grain boundaries, and we show that the damage can be recovered by annealing at 883 K. Lastly, our results have significant practical implications for the implementation of UNCD in extreme environment applications, and indicate that the films can be used as radiation sensors.
Authors:
ORCiD logo [1] ;  [2] ;  [2] ;  [2] ;  [2] ; ORCiD logo [3] ; ORCiD logo [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorat
  2. Thermo Fisher Scientific, Hillsboro, OR (United States)
  3. University of Technology Sydney (Australia). School of Physics and Advanced Materials
Publication Date:
Report Number(s):
LLNL-JRNL-716423
Journal ID: ISSN 1944-8244
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 9; Journal Issue: 45; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; damage recovery; dehydrogenation; electron-beam-induced damage; grain boundaries; Raman spectroscopy; reaction kinetics; ultra-nanocrystalline diamond
OSTI Identifier:
1410079