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Effects of supersonic fine particles bombarding on thermal barrier coatings after isothermal oxidation 被引量:1

超音速微粒轰击对热障涂层高温氧化行为的影响(英文)
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摘要 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(SFPB) process,on bond coat before applying the topcoat.After isothermal oxidation at 1000 °C for different time,the surface state of the bond coat and its phase transformation were investigated using X-ray diffraction(XRD),scanning electron microscopy(SEM) equipped with energy-dispersive X-ray spectrometry(EDS),transmission electron microscopy(TEM) and Cr3+ luminescence spectroscopy.The dislocation density significantly increases after SFPB process,which can generate a large number of diffusion channels in the area of the surface of the bond coat.At the initial stage of isothermal oxidation,the diffusion velocity of Al in the bond coat significantly increases,leading to the formation of a layer of stable α-Al2O3 phase.A great number of Cr3+ positive ions can diffuse via diffusion channels during the transient state of isothermal oxidation,which can lead to the presence of(Al0.9Cr0.1)2O3 phase and accelerate the γ→θ→α phase transformation.Cr3+ luminescence spectroscopy measurement shows that the residual stress increases at the initial stage of isothermal oxidation and then decreases.The residual stress after isothermal oxidation for 310 h reduces to 0.63 GPa 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 topcoat and bond coat can be obtained due to additional SFPB process. 在传统的热障涂层(TBCs)制备工艺的基础上,在制备热障涂层陶瓷层前,采用超音速微粒轰击技术(SFPB)改变粘结层的表面状态。采用 X 射线衍射分析仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、透射电子显微镜(TEM)和微区 Cr3+荧光光谱研究粘结层的表面结构及其 1000 °C时的高温氧化相变。粘结层表面位错密度大幅度增加,形成了大量的原子扩散通道;在高温氧化初期,粘结层中 Al 原子扩散速度的增快保证了优先形成一层稳定的α-Al2O3相;在高温氧化瞬态阶段,大量 Cr3+通过 SFPB 产生的扩散通道,形成过渡相(Al0.9Cr0.1)2O3,该过渡相间接促进了γ→θ→α相变。在高温氧化初期,热障涂层 TGO 中的残余应力先急剧增大然后减小;与高温氧化26 h 的 0.93 GPa 相比,高温氧化 310 h 的残余应力降低至 0.63 GPa。在热障涂层的 TGO 层中获得了单一、连续、致密的具有抗高温氧化能力的主相α-Al2O3,这利于进一步延长其使用寿命。
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第7期1629-1637,共9页 中国有色金属学报(英文版)
基金 Foundation item: Project (50575220) supported by the National Natural Science Foundation of China Project supported by State Key Laboratory of Engines,China
关键词 thermal barrier coatings(TBCs) supersonic fine particles bombarding(SFPB) isothermal oxidation Cr3+ luminescence spectroscopy dislocation density diffusion channel 热障涂层(TBCs)超音速微粒轰击(SFPB)高温氧化Cr3+荧光光谱位错密度扩散通道
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  • 1宋尽霞,韩雅芳,刘庆瑔,宫声凯,李树索,赵松.喷丸处理对IC6合金NiCoCrAlY涂层表面粗糙度的影响[J].航空材料学报,2006,26(3):289-290. 被引量:3
  • 2Lu, K,Lu, J.Surface Nanocrystallization (SNC) of Metallic Materials-Presentation of the Concept behind a New Approach[J].Journal of Materials Science & Technology,1999,15(3):193-197. 被引量:304
  • 3徐前岗,唐建新,王宁,陆峰,吴学仁.粘结层表面预处理对EB-PVD热障涂层循环氧化的影响[J].航空材料学报,2004,24(4):30-34. 被引量:5
  • 4Zhou Y C, Tonomori T, Yoshlda A, et al. Fracture characteristics of thermal barrier coatings after tensile and bending tests [ J ]. Surface Coatings Technology,2002, 157 (23) : 118 - 127.
  • 5Leontiev S A, Kuznetsov V G, Rybnikov A I, et al. Structure and properties of protective coating produced by vacuum arc deposition [J].Surfa Coat Tech, 1995, 76-77 (13): 41 -46.
  • 6Rybnikov A I,Tchizhik A A,Ogurtsov A P, et al. The structure and properties of metal and metal-ceramic coaings produced by physical vapour deposition [ J]. Journal of Materials Processing Technology, 1995, 55 (34) : 234 - 241.
  • 7Padture N P, Gell M, Jordan E H. Thermal barrier coatings for gas-turbine engine applications [ J ]. Science, 2002,296 : 280 - 284.
  • 8Tolpygo V K,Clarke D R,Murphy K S. Oxidation induced failure of EB-PVD thermal barrier coatings[J]. Surf Coat Technol,2001,146 - 147:124 - 131.
  • 9Li H W, Chang E, Wu B C, et al. Effects of bond coatpreoxidatian on the properties of ZrO2-8 wt% Y2 O3/Ni22Cr10Al1Y thermal barrier coatings [J].Oxid Metal, 1991,36 (3/4) :22 - 228.
  • 10李会谦 马江虹 等.热障涂层的氧化机理分析.有色金属:冶炼部分,2007,:54-57.

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