| 等离子喷涂纳米结构与传统结构热障涂层的残余应力对比研究 |
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| 引用本文： | 王亮,王铀,田伟,杨勇,周红霞.等离子喷涂纳米结构与传统结构热障涂层的残余应力对比研究[J].材料保护,2009,42(3). |
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| 作者姓名： | 王亮 王铀 田伟 杨勇 周红霞 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 热障涂层的残余应力是影响其服役寿研究不多.在45钢基体上,用超音速火焰喷涂NiCocrAlY打底层,再用大气等离子喷涂ZrO2-8%(质量分数)Y2O3(8YSZ)工作层,制备了纳米结构与传统结构2种类型的热障涂层(TBC).采用SEM、XRD对这2种涂层的粉末及涂层进行了组织结构分析,用纳米压痕仪测得了2种涂层的弹性模量.用X射线衍射应力测试仪测得了2种涂层的表层残余应力.结果表明:喷涂工艺参数相同条件下,对于打底层及工作层的厚度均相同的2种涂层,纳米结构热障涂层的表层残余应力比传统结构热障涂层约低24.7%;相同打底层的纳米结构热障涂层表层残余应力随着陶瓷层厚度增加而增加,陶瓷层厚度在240 um以下时,表层为残余压应力;厚度超过300 um时,表层为残余拉应力.最后提出了相应的物理力学模型.
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| 关 键 词： | 等离子喷涂 热障涂层 残余应力 纳米结构 |
Comparative Study of the Residual Stress in Plasma Sprayed Nanostructure and Conventional Structure Coatings |
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| WANG Liang,WANG You,TIAN Wei,YANG Yong,ZHOU Hong-xia.Comparative Study of the Residual Stress in Plasma Sprayed Nanostructure and Conventional Structure Coatings[J].Journal of Materials Protection,2009,42(3). |
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| Authors: | WANG Liang WANG You TIAN Wei YANG Yong ZHOU Hong-xia |
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| Affiliation: | WANG Liang,WANG You,TIAN Wei,YANG Yong,ZHOU Hong-xia (School of Materials Science , Engineering,Haerbin Polytechnical University,Haerbin 150001,China) |
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| Abstract: | Nano-structured feedstock of ZrO2-8wt% Y2O3 used for plasma spraying was obtained success-fully by making use of reconstituting nanoparticle technique. Then nano-structured and conventional ZrO2-8wt% Y2 03 (8YSZ) thermal barrier coatings (TBC) were prepared by atmos-pheric plasma spraying (APS) on NiCoCrAlY coated 45 steel substrates. The microstructure and phase composition of the two types of feedstock and corresponding plasma sprayed coatings were analyzed by means of scanning electron microscopy ( SEM) ... |
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| Keywords: | plasma spray thermal barrier coatings residual stress:nano-structured |
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