| ZrO2热障涂层耐高温冲刷性能研究 |
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| 引用本文： | 简中华,王富耻,曹素红.ZrO2热障涂层耐高温冲刷性能研究[J].新技术新工艺,2006(7):66-68. |
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| 作者姓名： | 简中华 王富耻 曹素红 |
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| 作者单位： | 北京理工大学,材料科学与工程学院,北京,10008 |
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| 摘 要： | 采用等离子喷涂工艺制备了NiCoCrAlY／ZrO2热障涂层，利用超音速火焰喷涂（HVOF）ZrO2粒子高速冲刷涂层表面，考察ZrO2热障涂层的耐高温冲刷性能。结果表明，等离子喷涂NiCoCrAlY／ZrO2热障涂层具有较好的耐高温冲刷性能，经高温高速粒子冲刷20s后，涂层与基体结合良好，涂层完整，未出现大面积的剥落。等离子喷涂ZrO2热障涂层高温冲刷的主要磨损机理为脉动冲击作用造成的裂纹扩展、涂层颗粒变形磨损和微切削。涂层的耐高温冲刷性能主要取决于涂层的硬度。
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| 关 键 词： | 热障涂层 高温冲刷性能 变形磨损 微切削 |
| 收稿时间： | 2006-05-25 |
| 修稿时间： | 2006-05-25 |
Study on High-temperature Erosion Resistance of NiCoCrAlY/ZrO2 Thermal Barrier Coating |
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| JIAN Zhonghua,WANG Fuchi,CAO Suhong.Study on High-temperature Erosion Resistance of NiCoCrAlY/ZrO2 Thermal Barrier Coating[J].New Technology & New Process,2006(7):66-68. |
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| Authors: | JIAN Zhonghua WANG Fuchi CAO Suhong |
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| Abstract: | NiCoCrAlY/ZrO_2 thermal barrier coatings were prepared by plasma spraying in this paper. High-temperature erosion resistance of the NiCoCrAlY/ZrO_2 coatings was studied by means of high velocity oxy-fuel spraying (HVOF) ZrO_2 particles towards the sprayed coatings. The results show that NiCoCrAlY/ZrO_2 coatings deposited by plasma spraying present good high-temperature erosion resistance. Undergoing impact of high temperature and high speed particles for 20s, the combination between the NiCoCrAlY/ZrO_2 coatings and substrate keeps tight and the coatings were not flaked off in large scale way from the substrate. The main modes of high-temperature erosion for NiCoCrAlY/ZrO_2 coatings are elongation of cracks and formation and micro-cutting of coating particles due to the cycle impact of HVOF particles. The hardness of NiCoCrAlY/ZrO_2 thermal barrier coating is the main factor of high-temperature erosion resistance. |
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| Keywords: | thermal barrier coatings high-temperature erosion resistant properties formation abrasion micro-cutting |
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