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of thermal barrier effects with coating thickness 3 结论 1) 大气等离子喷涂制备的热障涂层中,纳米涂层包含原始纳米组织,等轴晶粒和柱状晶组织,层间柱状晶粒彼此深入,组织较为致密.空心球涂层组织相对疏松,内部分布有更多的孔洞,孔洞的形状亦呈不规则形态,大小分布不均匀,层片比传统涂层薄. 2) 纳米涂层的空隙率最低,并且空隙更加细小；空心球涂层...; Analyses on thermal barrier effects of zirconia based thermal barrier coatings ZHOU Hong, LI Fei, HE Bo, LU Yan-ling, WANG Jun, SUN Bao-de (State Key Laboratory of Metal Matrix Composites, Shanghai Jiao......
.结果表明:涂层中La2O3/ZrO2/CeO2的相对含量偏离了化学计量比,但X 射线衍射(XRD)相结构与靶材非常相似.通过CeO2 掺杂后,LZ7C3体材料的热膨胀系数比La2Zr2O7 (LZ)大;在1100℃恒温氧化890h的条件下,LZ7C3涂层的抗氧化增重性能明显优于传统的Y2O3部分稳定化的ZrO2(8YSZ)涂层.此外,热膨胀不匹配,黏结层氧化和陶瓷涂层内部微观裂纹的出现可能是导致LZ7C3涂层恒温氧化失效的主要原因. 关键词:热障涂层; EB-PVD; 等温氧化; La2(Zr0.7Ce0.3)2O7; thermal barrier coating; EB-PVD; isothermal oxidation; La2(Zr0.7Ce0.3)2O7; [全文内容正在添加中] ......
超声激励电压对等离子喷涂ZrO2热障涂层结合强度的影响 李路明1,马骏2,文雄伟1,张华堂2 (1.清华大学航空航天学院,北京,100084;2.清华大学机械工程系,北京,100084) 摘要:在等离子喷涂过程中实时导入超声激励,进行ZrO2热障涂层制备.喷涂过程中保证超声激励频率不变,改变超声激励电压,并与不加超声进行对比,研究了其对涂层结合强度的影响.结果表明,施加适当的超声激励电压对涂层结合强度的提高和稳定可起到促进的作用. 关键词:电弧超声; 等离子喷涂; 热障涂层; 电压; 结合强度; [全文内容正在添加中] ......
Composite ceramics thermal barrier coatings of yttria stabilized zirconia for aero-enginesQiaomu Liu,Shunzhou Huang,Aijie HeAECC Sichuan Gas Turbine Establishment摘 要:Composite ceramics thermal barrier coatings(TBCs) are widely used in the aero-engines field due to their excellent thermal insulation, which improves the service life and durability......
barrier coating of ZrO2 and its internal stress [J]. Surface Engineering, 1994, 7: 11-16.(in Chinese) [3]Ahrens M, Vaβen R, Stver D. stress distributions in plasma-sprayed thermal barrier coatings... coating and thermally growing oxide(TGO) in the EB-PVD thermal barrier coatings subjected to thermal loadings. The effects of some environmental and material parameters were studied, such as thermal......
文献标识码:A Al2O3- based multiphase ceramic coating of Al-CuO system prepared by SHS reaction thermal spraying on AZ91D MA Zhuang, LIN Peng, DONG Shi-zhi, LI Zhi-chao ... further. Key words: AZ91D magnesium alloy; SHS reaction thermal spraying; ceramic coating ......
纳米ZrO2热障涂层热震性能研究 王全胜1,吕艳红2,吴子健2 (1.北京理工大学材料科学与工程学院,北京,100081;2.钢铁研究总院,北京,100081) 摘要:为了研究纳米热障涂层的热震性能,采用等离子喷涂工艺制备了纳米Y2O3-ZrO2(YSZ)热障涂层,并测试了涂层的热震性能.借助扫描电镜和X射线衍射等手段分析了涂层的物相构成和组织结构.结果表明,涂层中保留未完全熔融的小尺寸颗粒,且存在大量的孔径＜1 μm的微孔,该结构对提高涂层的热震性能极为有利.纳米涂层抗热震性能显著优于常规热障涂层,从室温至1 000℃,经800次热循环,涂层无明显的脱落现象. 关键词:Y2O3-ZrO2纳米热障涂层; 等离子喷涂; 热震性能; [全文内容正在添加中] ......
of high-temperature sintered and CaO-MgO-Al2O3-SiO2(CMAS) corroded air plasma sprayed Y2O3 stabilized ZrO2(YSZ) thermal barrier coatings(TBCs) under the thermal gradient condition were comparatively...Comparison of CMAS corrosion and sintering induced microstructural characteristics of APS thermal barrier coatingsYiyou Wu1,2,Hua Luo1,2,Canying Cai1,2,Yanguo Wang1,2,Yichun Zhou1,2,Li......
The Properties of Solution Precursor Plasma Spray Nanostructured Thermal Barrier Coatings闵捷State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology摘 要:About 300 μm thickness uniform thermal barrier coatings (TBCs) were deposited on the 1Cr18Ni9Ti samples by solution precursor plasma spray (SPPS......
ZrO2 (GY-YSZ) thermal barrier coatings (TBCs) were produced by electron beam physical vapor deposition (EB-PVD). The oxidation behavior of GY-YSZ at 1 050 °C was investigated using impedance... words: rare earth oxide; Gd2O3; Yb2O3; thermal barrier coatings (TBCs); oxidation; impedance spectroscopy (IS) 1 Introduction Thermal barrier coating (TBC) is a surface thermal protection technology......
