| NiAl—TiC原位复合材料的室温韧化机制研究 |
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| 引用本文： | 邢占平,于立国.NiAl—TiC原位复合材料的室温韧化机制研究[J].材料工程,1997(5):20-22. |
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| 作者姓名： | 邢占平 于立国 |
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| 作者单位： | [1]北京航空材料研究院 [2]中科院金属研究院 |
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| 摘 要： | 通过热压放热反应合成工艺制备的ＮｉＡｌ－２００ｖｏｌ％ＴｉＣ原位复合材料，它的平均室温断裂韧性比单相ＮｉＡｌ提高了５０％，断口形貌及裂纹扩展路径观查表明，裂纹偏转机制是复合材料的主要韧化机制。
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| 关 键 词： | 原位 复合材料 韧化机制 NiAl－TiC |
Study on the Room Toughening Mechanism in the Ni Al- Ti C in Situ Composite |
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| Xing Zhanping.Study on the Room Toughening Mechanism in the Ni Al- Ti C in Situ Composite[J].Journal of Materials Engineering,1997(5):20-22. |
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| Authors: | Xing Zhanping |
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| Abstract: | Fracture toughness of Ni Al- Ti C in situ composites was measured using single-edge notched three- point bend specimens. The composites were fabricated by a hot pressing aidedexothermic synthesis( HPES) technique.The results show that the average fracture toughness ofthe composite was8.9MPa.m1/2 ,50 % higher than that of monolithic Ni Al.From fracture sur-face and crack propagation path analysis,crack deflection was rationalized as the predominanttoughening mechanisms. |
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