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    2020-4-13 · In the present work, we reported the growth of silicon nitride (Si 3 N 4) microrings formed by self‐coiling of nanobelts with a typical saw‐like structure on one side, which were synthesized via catalyst‐assisted pyrolysis of organic precursors.The as‐grown microrings were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X‐ray ...

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    2017-1-19 · However, in 2009, Hyperion Power changed the design to uranium nitride fuel and lead-bismuth cooling to expedite design certification12. This now classes it as a fast neutron reactor, without moderation. The company claims that the ceramic nitride fuel has superior thermal and neutronic properties compared with uranium oxide.

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