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THE INFLUENCE OF Mo DIFFUSION ON THE THERMAL BEHAVIOR OF TBCs ON Ni3Al BASED ALLOY IC-6 H.B.Xu1,D.B.Zhang1,S.K.Gong1,Y.F.Han2 (1.Department of Materials Science and Engineering, Beijing University... thermal barrier coatings (TBCs) were preparedonto γ''-Ni3Al based alloy IC-6 by electron beam physical vapor deposition (EB-PVD).Isothermal oxidation and thermal cycling tests were carried out......
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......
Abstract: This work was attempted to modify the current technology for thermal barrier coatings (TBCs) by adding an additional step of surface modification, namely, supersonic fine particles bombarding... compared with 0.93 GPa after isothermal oxidation for 26 h. In order to prolong the lifespan of TBCs, a layer of continuous, dense and pure α-Al2O3 with high oxidation resistance at the interface between......
(thermal barrier coatings,TBCs)的危害越来越严重,一方面导致叶片表面气膜冷却孔堵塞,降低冷效,改变叶片温度场和应力场;另一方面,引起叶片TBCs服役寿命大幅度下降.如何解决叶片TBCs表面CMAS吸附和渗透的问题对于高性能航空发动机的研制非常关键,也是目前TBCs研究领域的难点.本文重点阐述了TBCs在CMAS环境下的热化学,密实,相变等失效机理,并简述了国际上目前一些如涂层组织结构优化,添加阻渗层和牺牲层等解决CMAS问题的方法.关键词:热障涂层(TBCs);CaO-MgO-Al2O3-SiO2(CMAS);失效机理;防护;......
mechanisms during isothermal oxidation test of EB-PVD NiAl coating were also discussed. Key words: thermal barrier coatings(TBCs); EB-PVD; NiAl; oxidation 1 Introduction It is well known that NiAl..., all the coated samples exhibit obvious lower oxidation rate than the substrate. 2) The porous structure of the as-deposited coating is not fit for being as bond coat for TBCs. 3) For the ground......
YPSZ涂层隔热性能预测 曾克里1,于月光1,刘富荣1,任先京1 (1.北京矿冶研究总院,北京,100044) 摘要:Thermal barrier coatings(TBCs)have been widely applied to protect metallic components in gas turbines or aero engine against the high... temperature to the TBCs,which is an important parameter to affect the perform-ance of the TBCs during their applications.In the present study,a 3D finite element simulation has been carried out to predict......
热障涂层的研究现状与发展方向 易丹青1,周宏明1,余志明1,肖来荣1 (1.中南大学材料科学与工程学院,长沙,410083) 摘要:热障涂层(TBCs)是目前最先进的高温防护涂层之一,具有良好的隔热效果和抗高温氧化性能.综述了热障涂层的陶瓷材料,粘结层材料,涂层结构,制备工艺及涂层失效机理等5个方面的研究现状,在此基础上提出了热障涂层的发展方向. 关键词:热障涂层(TBCs); 研究现状; 发展方向; [全文内容正在添加中] ......
等离子喷涂双相复合结构顶层热障涂层的研究张东博1,于越1,赵中昱1,2,田忠原1,31. 华北电力大学能源动力与机械工程学院2. 河钢集团钢研总院3. 国家知识产权局专利局专利审查协作北京中心摘 要:热障涂层(TBCs)是燃气轮机等设备的高温部件上不可缺少的防护技术.La2Zr2O7是最具潜力的顶层材料,但其...增多,粗大裂纹减少,裂纹会产生曲折和分叉.LaPO4的加入提高了双相陶瓷材料的韧性和断裂强度,和单相La2Zr2O7涂层相比,双相陶瓷涂层在冲蚀过程中失重较少.关键词:热障涂层(TBCs);双相复合陶瓷顶层;热循环;微裂纹;韧性;......
传统等离子喷涂热障涂层的裂纹扩展行为董会,姚建洮,李霄,周勇,张朋辉西安石油大学材料科学与工程学院摘 要:简述了影响等离子喷涂热障涂层失效机制的因素及等离子喷涂热障涂层裂纹的萌生,扩展和合并行为;分析了裂纹尺寸与热障涂层寿命之间的关系;讨论了热障涂层裂纹扩展及其研究趋势.关键词:热障涂层(TBCs);裂纹扩展行为;失效模式;大气等离子喷涂(APS);......
La2Zr2O7 TBCs toughened by Pt particles prepared by cathode plasma electrolytic depositionShun-jie Deng,Peng Wang,Ye-dong He,Jin ZhangInstitute for Advanced Materials and Technology, University of Science and Technology Beijing摘 要:La2Zr2O7 thermal barrier coatings(TBCs) with dispersed Pt particles were prepared by cathode plasma electrolytic deposition......