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no excess carbon phase could be imaged by HRTEM even annealing the samples at temperatures as high as 1400 ºC, no matter which way the carbon exists in ceramics: homogeneous distribution of carbon clusters or a network of graphitic-like lamellae of a few atom layers. Two reasons might explain this phenomena: a) the carbon phase is not well ordered (amorphous-like) and hence gives a similar projected potential as the surrounding amorphous SiCN and/or, b) the ordered carbon regions are considerably smaller than the foil thickness (10¨C20 nm) illuminated by the electron beam.

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2Â¥2008-04-17 13:02:39
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shanniepoo

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3Â¥2008-04-17 13:16:48
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homogeneous distribution of carbon clusters Ö¸µÄÊÇ̼ԭ×ÓÍÅ´Ø·Ö²¼¾ùÔÈ
the ordered carbon regions are considerably smaller than the foil thickness (10¨C20 nm) illuminated by the electron beam.
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bobby004

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simba271

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liurenmingok

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