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Growth sector dependence and mechanism of stress formation in epitaxial diamond growth

Applied Physics Letters, ISSN: 0003-6951, Vol: 100, Issue: 4
2012
  • 23
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  • 28
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Metrics Details

  • Citations
    23
    • Citation Indexes
      23
  • Captures
    28

Article Description

Stress generation in epitaxial diamond growth was investigated by μ-Raman spectroscopy and high resolution x-ray diffraction. Intrinsic stress could be varied systematically from compressive to tensile covering a huge range of 5 GPa. The temperature-stress curve for growth on {111}-sectors as compared to {001} shows a shift of -200 °C or +2 GPa. A crucial role of hydrogen in the stress formation process is excluded. Due to the absence of grain boundaries, a model is proposed which is based on the "effective climb" of individual dislocations. The controlled generation of stress profiles offers a powerful concept for strengthening diamond mechanical devices. © 2012 American Institute of Physics.

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