| 钛合金表面等离子喷涂ZrO2—NiCoCrAlY梯度涂层的抗热震行为 |
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| 引用本文： | 向兴华,来忠红.钛合金表面等离子喷涂ZrO2—NiCoCrAlY梯度涂层的抗热震行为[J].宇航学报,1998,19(2):61-65. |
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| 作者姓名： | 向兴华 来忠红 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院，哈尔滨工业大学分析测试中心 |
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| 摘 要： | ＺｒＯ２－ＮｉＣｏＣｒＡｌＹ梯度涂层的成分沿厚度方向呈连续梯度化分布，提高了涂层与基体的粘结强度和涂层的内聚强度，其抗热震性能优于双层涂层。在较大热冲击应力作用下，梯度涂层整体自基体表面剥落而失效；在较小热冲击应力作用下，由于ＮｉＣｏＣｒＡｌＹ底层与ＴＣ４合金基体发生了热相互作用，改善了涂层与基体的结合状况，梯度涂层纵向断裂并部分自基体表面剥落而失效。
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| 关 键 词： | 等离子喷涂 热障涂层 抗热震性能 ZrO_2陶瓷 Ni基合金 |
THERMAL SHOCK BEHAVIOUR OF PLASMA SPRAYED ZrO 2 NiCoCrAlY GRADED COATING ON Ti 6AL 4V SUBSTRATE |
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| Xiang Xinghua,Quan Chengjun,Zhu Jingchuan,Yin Zhongda.THERMAL SHOCK BEHAVIOUR OF PLASMA SPRAYED ZrO 2 NiCoCrAlY GRADED COATING ON Ti 6AL 4V SUBSTRATE[J].Journal of Astronautics,1998,19(2):61-65. |
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| Authors: | Xiang Xinghua Quan Chengjun Zhu Jingchuan Yin Zhongda |
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| Abstract: | Since the components in ZrO 2 NiCoCrAlY graded coating distribute gradually along the direction of thickness,the adherent strength of coating and the coherent strength between coating and substrate are improved,and the thermal shock property of the graded coating is superior to that of the duplex coating.Under the condition of greater thermal shock stress,the coating spalls integrally from the surface of Ti 6Al 4V substrate;Under the condition of weaker thermal shock stress,the coating fractures and spalls partly from the surface of the substrate. |
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| Keywords: | Plasma spraying Thermal barrier coatings Thermal shock property ZrO 2 ceramics Ni base alloy |
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