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of Petrochemical Technology, Beijing 102617, China Received 15 July 2007; accepted 10 September 2007 Abstract: The NiCrAlY+ZrO2 thermal barrier coating was prepared on the surface of TiAl alloy by plasma...-brittle transition temperature of coating and minimum elongation in its brittle areas[5-11]. In this work, the NiCrAlY+ZrO2 thermal barrier coating was prepared on the surface of TiAl alloy by plasma......
. They go through the whole ZrO2 coating once vertical cracks form. When thermal shock cycles increase, horizontal cracks that result in coatings failure forms in the coatings and interface. And vertical...Thermal Shock Property of Al/Ni-ZrO2 Gradient Thermal Barrier Coatings WANG Quan-sheng1,ZHANG Wei-fang2,FAN Jin-juan2 (1.Department of material science and engineering, Beijing Institute......
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′相含量明显减少. 3) 由于γ晶粒内析出的γ′相细小弥散与基体γ保持共格,对涂层起到析出强化作用,真空热处理过程中涂层硬度随γ′相含量的增加而提高,随γ'相含量的减少而下降,经700~750 ℃真空热处理后,NiCrAlY涂层可获得最佳析出强化效果. REFERENCES [1] BOSE S, DEMASHI-MARCIN J. Thermal barrier coating... behavior of the NiCrAlY coating systems with or without barrier layer during three-point bending[J]. Materials Science and Engineering A, 2009, 512(1/2): 117-125. [20] POZE P, GRANT P S. Microstructure......
of vacuum-plasma-sprayed Co-Ni-Cr-Al-Y coating [J]. Mat Sci Eng A, 1989, 108(1): 73-80. [9] Schulz U, Fritscher K, Peters M. EB-PVD Y2O3- and CeO2/Y2O3- stabilized zirconia thermal barrier coatings crystal... and oxidation resistance of NiCrAlY coating deposited on Co-based high-temperature alloy by arc ion plating technology ZHOU Hong-ming, YI Dan-qing, XIAO Lai-rong, YE Yun (School of Materials Science......
in water quenching.Key words:NiCrAlY coating; diffusion barrier; cycled oxidation; interface; failure mechanism...挡层；循环氧化；界面；失效机理Microstructural evolution and failure mechanism of NiCrAlY coating systems during different cycled oxidationsLI Wei-zhou1, 2, 3, LI Yue-qiao2, YI Dan-qing1, LIU Hui-qun1, SUN Chao3(1......
,并且随着热暴露时间的延长,析出相尺寸变大,数量增多,析出相所占区域的厚度也不断增大. 图3 NiCrAlY涂层/镍基高温合金试样在1 100 ℃下不同时间热暴露后截面微观形貌 Fig. 3 Cross-sectional SEM images of NiCrAlY coating/Ni-based superalloy samples after thermal exposure at 1... Morphology of TCP phases precipitated at coating/substrate interface after 100 h thermal exposure at 1 100 ℃ 图6 NiCrAlY涂层/镍基高温合金试样1 100 ℃热暴露100 h后TCP相的高角环形暗场相及EDS扫描结果 Fig. 6 STEM images and corresponding......
Wavelet analysis of acoustic emission signals from thermal barrier coatings YANG Li(杨 丽), ZHOU Yi-chun(周益春) Key Laboratory for Advanced Materials and Rheological Properties of Ministry... to the analysis of acoustic emission signals collected during tensile test of the ZrO2-8% Y2O3 (YSZ) thermal barrier coatings (TBCs). The acoustic emission signals are de-noised using the Daubechies discrete......
barrier coatings with HVOF NiCrAlY bond coat[J]. Journal of Thermal Spray Technology, 2011, 20(5): 1133-1138. [12] BALA N, SINGH H, PRAKASH S, et al. Investigations on the behavior of HVOF and cold... in NiCrAlY coating exposed to atmosphere with KCl molten salt at 700 ℃ 3 结论 1) 随着氧燃比的升高,未熔粉末颗粒减少,涂层中γ/γ′峰向高角度偏移,涂层结合强度由49 MPa升高到62 MPa.氧燃比对涂层显微硬度影响较小,显微硬度维持在400 HV左右. 2) 热腐蚀过程中,4种涂层单位面积质量增加随时间变化......
