| 相变增韧陶瓷压痕开裂的力学分析 |
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| 引用本文： | 梁开明,顾扣芬.相变增韧陶瓷压痕开裂的力学分析[J].硅酸盐学报,1994,22(1):29-37. |
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| 作者姓名： | 梁开明 顾扣芬 |
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| 作者单位： | 清华大学材料科学与工程系 |
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| 摘 要： | 在相变增韧陶瓷中，压痕裂纹形成的原因除了因压痕导致塑性区体积变化产生的残余应力外，还与应力诱发相变导致塑性区体积膨胀而产生的附加应力或称相变应力有关。传统的压痕法和压痕－强度法忽略了相变应力对压痕开裂和试样断裂的贡献，所测得相变增韧陶瓷的断裂韧性数据往往偏低。
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| 关 键 词： | 压痕法 相变增韧 陶瓷 断裂韧性 |
MECHANICAL ANALYSIS OF INDENTATION CRACKING FOR TRANSFORMATION TOUGHENING CERAMICS |
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| Liang Kaiming,.MECHANICAL ANALYSIS OF INDENTATION CRACKING FOR TRANSFORMATION TOUGHENING CERAMICS[J].Journal of The Chinese Ceramic Society,1994,22(1):29-37. |
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| Authors: | Liang Kaiming |
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| Abstract: | Besides residual stress,there is an additional driving force for indentation cracking in the ceramicscontaining transformable particles, This additional driving force is induced by martensitic transformation in theplastic zone beneath the indenter.In the traditional indentation theory,the contribution of transformation drivingforce is not considered,so that the value of fracture toughness measured by the indentation method or indentation-strength method is usually lower than the practical value for the transformation toughening ceramics. |
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| Keywords: | indentation method indentation-strength method transformation toughening ceramics fracture toughness |
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