| 晶须和相变复合增韧陶瓷的复合增韧模型 |
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| 引用本文： | 宋桂明,周玉,孙毅,雷廷权.晶须和相变复合增韧陶瓷的复合增韧模型[J].无机材料学报,1998,13(2):195-200. |
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| 作者姓名： | 宋桂明 周玉 孙毅 雷廷权 |
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| 作者单位： | 哈尔滨工业大学材料学院433信箱!哈尔滨，150001，哈尔滨工业大学材料学院433信箱!哈尔滨，150001，哈尔滨工业大学材料学院433信箱!哈尔滨，150001，哈尔滨工业大学材料学院433信箱!哈尔滨，150001 |
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| 摘 要： | 建立了晶须和相变复合增韧陶瓷的复合增韧模型，其中晶须增韧考虑了裂纹桥联和裂纹偏转两种机理；相变增韧在考虑体膨胀作用的基础上，用切应变影响因子来考虑切应变增韧效应．计算结果表明，相变增韧、桥联增韧和裂纹偏转增韧存在相干性，相变增韧降低晶须增韧效果，而晶须增韧促进相变增韧效果，SiCw／ZrO2（2mol％Y2O3）／Al2O3断裂韧性的计算结果与实验结果吻合．
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| 关 键 词： | 复合增韧模型 晶须增韧 相变增韧 R-曲线 陶瓷基复合材料 |
| 收稿时间： | 1997-3-31 |
| 修稿时间： | 1997-6-23 |
Modelling of Combine Toughening in Whiskers and Transformation Combine Toughening Ceramics |
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| SONG Gui-Ming,ZHOU Yu,SUN Yi,LEI Ting-Quan.Modelling of Combine Toughening in Whiskers and Transformation Combine Toughening Ceramics[J].Journal of Inorganic Materials,1998,13(2):195-200. |
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| Authors: | SONG Gui-Ming ZHOU Yu SUN Yi LEI Ting-Quan |
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| Affiliation: | SchoolofMaterials;HarbinInstituteofTechnologyHarbin150001China |
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| Abstract: | A model of combine toughening in the ceramics toughened with whiskers and phase-transformingparticles is presented. The whisker toughening consists of crack bridging and crack deflection. Fortransformation toughening, the shear effect is considered by using a shear factor, f, based on thedilatation contribution. Calculated results show that there are interactions among crack bridging, crack deflection and transformation toughening. Crack bridging and crack deflection increasethe transformation toughening contribution, but transformation toughening decreases the contributions of crack bridging and crack deflection. Predictions of the toughness of SiCw /ZrO2 (2mol%Y2O3 )/Al2O3 based on the present model are showed to be in good agreement with the experimentalresults. |
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| Keywords: | combine toughening model whisker toughening transformation toughening R-curve ceramic matrix composites |
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