Ar及びN_2雰囲気下でのSi_3N_4とCoとの反応 Interaction of Si_3N_4 with Co under Ar or N_2 Atmosphere
In relation to the joining of silicon nitride ceramics to metal, the reaction products between Si<SUB>3</SUB>N<SUB>4</SUB> and Co have been investigated under Ar or N<SUB>2</SUB> atmosphere at temperatures from 1423 to 1673K. Using Si<SUB>3</SUB>N<SUB>4</SUB>-Co powder mixtures, the reaction rate was determined thermogravimetrically and the reaction products were examined by X-ray diffraction. Above 1423K, the reaction proceeded under both atmospheres. The Co-Si solid solution was formed at low temperatures. At higher temperatures and on prolonged heating, the reaction products changed in the following order: Co-Si solid solution, Co<SUB>2</SUB>Si, CoSi and CoSi<SUB>2</SUB>. Under Ar atmosphere, the formation of cobalt silicides was enhanced, because of low partial pressures of N<SUB>2</SUB>.
粉体および粉末冶金 43(3), 346-350, 1996-03-15
Japan Society of Powder and Powder Metallurgy