| ZrO2-Ni功能梯度材料的热冲击与热疲劳行为 |
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| 引用本文： | 朱景川,来忠红,尹钟大,李明伟.ZrO2-Ni功能梯度材料的热冲击与热疲劳行为[J].材料科学与工艺,2001,9(4):387-392. |
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| 作者姓名： | 朱景川 来忠红 尹钟大 李明伟 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院, |
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| 摘 要： | 通过抗热震参数分析和热循环试验研究了ZrO2-Ni功能梯度材料（FGM）的热冲击与热疲劳行为及其影响因素。结果表明，ZrO2-Ni FGM热热震参数呈梯度分布，ZrO2侧抗热冲击断裂能力强而富Ni区热疲劳抗力高。其热震破坏符合热疲劳损伤机理，裂纹的准静态扩展为其控制因素。热疲劳裂纹在梯度层内以微孔聚集、连接方式萌生和扩展，而在梯度层间无横向贯穿裂纹，克服了传统陶瓷／金属结合体的界面热应力剥离问题。
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| 关 键 词： | 功能梯度材料 热冲击 热疲劳 氧化锆陶瓷 镍 金属 复合材料 |
| 文章编号： | 1005-0299(2001)04-0387-06 |
| 修稿时间： | 2000年11月24日 |
Thermal shock and thermal fatigue behaviors of ZrO2 -Nifunctionally graded material |
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| ZHU Jing chuan,LAI Zhong hong,YIN Zhong da,LI Ming wei.Thermal shock and thermal fatigue behaviors of ZrO2 -Nifunctionally graded material[J].Materials Science and Technology,2001,9(4):387-392. |
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| Authors: | ZHU Jing chuan LAI Zhong hong YIN Zhong da LI Ming wei |
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| Abstract: | The thermal shock and thermal fatigue behaviors as well as their controlling factors of ZrO 2-Ni functionally graded material (FGM) were studied by thermal shock and thermal cycling tests. The results demonstrate that the distribution of thermal shock resistance in ZrO 2-Ni FGM has a graded character. The thermal shock resistance is higher in zirconia rich layers while the thermal fatigue resistance is better in nickel rich layers of the FGM. The thermal shock fracture agrees with the mechanism of thermal fatigue damage, and is controlled by the quasi static propagation of cracks. The thermal fatigue cracks initiate and grow in graded layers in the way of aggregation of microvoids and their connection. However, there is no crack between the graded layers, and the thermal stress induced spallation in the joint interface of conventional ceramics/metal bonding has been avoided. |
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| Keywords: | functionally graded material thermal shock thermal fatigue zirconia nickel |
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