Ar及びN<sub>2</sub>雰囲気下でのSi<sub>3</sub>N<sub>4</sub>とMnとの反応

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タイトル別名
  • Interaction of Si<sub>3</sub>N<sub>4</sub> with Mn under Ar or N<sub>2</sub> Atmosphere
  • Ar オヨビ N2 フンイキカ デ ノ Si3N4 ト Mn ト ノ ハンノウ

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In relation to the joining of silicon nitride ceramics to metal, the reaction products and reaction mechanism between Si3N4 and Mn have been investigated in Ar or N2 at temperatures from 1073 to 1573K. Using an Si3N4-Mn powder mixture, the reaction rate was determined thermogravimetrically, and the reaction products were examined by X-ray diffraction. Under an Ar atmosphere, from 1223 to 1423K, MnSiN2, Mn0.815Si0.815 and Mn3Si were produced, and above 1423K, MnSiN2 disappeared. At higher temperatures and on prolonged heating, the suicide composition changed in the following order: Mn0.815Si0.185, Mn3Si, Mn5Si3, and MnSi. Under an N2 atmosphere, the reaction between Mn, Si3N4 and N2 produced Mn nitrides and MnSiN2. Below 1223K, the reaction products were Mn6N2.58 and Mn4N. At higher temperatures, MnSiN2 appeared, while Mn nitrides disappeared. Above 1423K, only MnSiN2 was produced. By relating these results to TG measurements, a full understanding of the reaction mechanism between Si3N4 and Mn was acquired.

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