晶须及颗粒增韧氧化铝基陶瓷复合材料的阻力行为

兵器材料科学与工程 , 2001, 24(3): 14-21. doi: 10.3969/j.issn.1004-244X.2001.03.004

晶须及颗粒增韧氧化铝基陶瓷复合材料的阻力行为

吕 ^1, , 金志浩 ^2, , 郑治祥 ^3, , 丁厚福 ^4,

1.西安交通大学

2.西安交通大学

3.合肥工业大学材料学院

4.合肥工业大学材料学院

关键词：压痕强度 , 阻力曲线 , 增韧机理 , 复合材料

R-CURVE BEHAVIOR OF Al2 O3 CERAMIC MATRIX COMPOSITES

采用压痕-弯曲强度法获得了Al2O3-SiCw和Al2O3-TiCp两种复合材料的阻力曲线,结果表明,与基体材料相比,两种材料均呈现出明显的上升阻力曲线行为.其中Al2O3-SiCw复合材料显示出更为优越的抗裂纹扩展能力.通过SEM观察及理论分析可知:材料的增韧机理及显微组织是产生这一现象的主要原因.

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