ベルヒドロポリシラザンより製造された窒化ケイ素繊維の引張強度

概要

論文の詳細を見る
The pyrolysis temperature dependence of tensile strength has been studied for silicon nitride fibers produced by pyrolysis of perhydropolysilazane fibers in N_2. The tensile strength of silicon nitride fibers increased up to 4300 MPa with increasing pyrolysis temperature. Catastrophic drops in tensile strength took place following crystallization of Si_3N_4. Crystalline Si precipitated at 11000℃ and crystallization of a-Si_3N_4 took place at 1200℃ in silicon nitride fibers (B) derived from perhydropolysilazane fibers in which the Si/N atomic ratio deviated from 3/4 in the presence of excess Si. Crystallization of a-Si_3N_4 took place at 1400℃ in silicon nitride fibers (A) produced from perhydropolysilazane fibers with the near stoichiometric composition. Silicon nitride fibers (A) retained high tensile strength even after exposing above 1300℃.
社団法人日本セラミックス協会の論文
1990-01-01