【摘要】 通过压痕小裂纹直接测量法获得 Si3N4/BN纤维独石陶瓷的阻力曲线 ,采用指数经验公式拟合了实验数据 ,对纤维独石陶瓷阻力曲线具有的独特的阶梯状进行分析 ,并对纤维独石陶瓷具有高韧性的机理作了研究通过压痕小裂纹直接测量法获得 Si3N4/ BN纤维独石陶瓷的阻力曲线 ,采用指数经验公式拟合了实验数据 ,对纤维独石陶瓷阻力曲线具有的独特的阶梯状进行分析 ,并对纤维独石陶瓷具有高韧性的机理作了研究更多还原

【Abstract】 WT5BZ]R curves for Si 3N 4/BN fibrous monolithic ceramic were established by direct measurement of the change of Vickers indentation cracks in length under progressively applied bending stresses. The fracture behavior of the Si 3N 4/BN fibrous monolithic ceramic was studied. An empirical exponential relation was fitted for the data. The unique steplike shape whiich was possessed of the R curve of fibrous monolithic ceramic was discussed. Moreover, the mechanism of high fracture toughness of fibrous monolithic ceramic was further explained.更多还原