利用A12O3和Y2O3为烧结助剂,通过热压烧结工艺制备了碳纤维增强碳化硅复合材料.结果表明:球磨工艺有助于短切碳纤维的均匀分散.烧结过程中,烧结助剂A12O3、y2O3之间发生化学反应,促进液相烧结,并形成晶界间的次晶相YAG,有利于提高复合材料的断裂韧性.在较高烧结温度下,碳纤维与烧结助剂以及基体之间反应,形成过强结合界面,纤维性能降低,不利于复合材料力学性能的提高.
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