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and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China Received 20 April 2006; accepted 30 June 2006 Abstract: Two-layer structure thermal barrier coatings (TBCs... investigated by isothermal oxidation and thermal shock tests. It is found that the mass gains of the substrate with and without TBCs are 0.165 and 7.34 mg/cm2, respectively. So the TBCs system......
EB-PVD热障涂层对IC10合金高温持久性能的影响 贺世美1,何利民1,李建平1,吴小梅1 (1.北京航空材料研究院,北京,100095) 摘要:采用电弧离子镀技术在IC10合金基体上制备NiCrAlYSi粘结层,采用电子束物理气相沉积(EB-PVD)技术在粘结层上制备YSZ陶瓷面层,研究TBCs涂层对IC10合金高温持久性能的影响.结果表明,IC10合金沉积TBCs涂层后,980℃高温持久寿命高于IC10合金,持久塑性略高于基体合金,IC10合金沉积TBCs涂层后,对高温持久性能无不良影响,满足使用要求. 关键词:IC10合金; YSZ热障涂层; 高温持久性能; EB-PVD; NiCrAlYSi粘结层; [全文内容正在添加中] ......
LZO对热障涂层中粘结层氧化的抑制行为研究李文生,杨乐馨,安国升,成波,冯力,张义兰州理工大学有色金属先进加工与再利用国家重点实验室摘 要:为了阐明La2Zr2O7 (LZO)对热障涂层(TBCs)中粘结层氧化的抑制作用,利用爆炸喷涂(D-gun)在310S基体上制备NiCoCrAlY粘结层,大气等离子(APS)制备单陶瓷8YSZ涂层和双陶瓷LZO/8YSZ涂层.采用SEM,EDS和XRD表征了不同结构TBCs喷涂态及高温氧化后的微观组织和相结构.结果表明:1100℃下等温氧化(100h)后双陶瓷LZO/8YSZ与单陶瓷8YSZ热障涂层相对氧化增重分别为2.82和3.13mg/cm2,热生长氧化物(TGO)生长速率常数Kp分别为5.79×10-2和6.26×10-2μm2/h,厚度分布范围分别为......
(TBCs) is 7 wt.%Y2O3-ZrO2 (7YSZ), generally deposited by electron beam-physical vapor deposition (EB-PVD). Due to the increasing demand for higher operating temperature in aero-derivative gas turbines, a lot of effort has been made to prevent the premature failure of columnar 7YSZ TBCs, which is induced by the microstructure degradation, sintering and spallation after the deposition of infiltrated......
EB-PVD 热障涂层TGO中氧化物混合区的形成及其影响 陆峰1,唐建新1,吴学仁1,徐前岗1 (1.北京航空材料研究院,北京,100095) 摘要:研究了电子束物理气相沉积热障涂层在1150~30℃之间的循环氧化行为;分析了TGO中YSZ-Al2O3混合区的形成过程及其对TGO的生长与TBCs失效的影响.TGO的向外生长和TBC沉积时形成的YSZ细晶区是形成YSZ-Al2O3混合区的两个重要条件.YSZ-Al2O3混合区对TBCs失效的影响表现在加速TGO的生长和裂纹易在该混合区形成两方面. 关键词:电子束物理气相沉积; 热障涂层; 热生长氧化物; [全文内容正在添加中] ......
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... by forced-air to measure the thermal cycling capability.Coatings density were measured by means of water displacement.The experimental results show that grain size of the SPPS TBCs is about 30 nm......
等离子喷涂Al2O3与ZrO2复合热障涂层的高温性能 张罡1,武颖娜1,冯钟潮1,巴瑞章3,梁勇1 (1.中国科学院金属研究所,辽宁,沈阳,110016;2.沈阳工业学院,辽宁,沈阳,110015;3.北京航空制造技术研究所,北京,100024) 摘要:采用等离子喷涂(PS)方法,在GH536高温合金基材上制备了传统的双层热障涂层(TBCs)和2种含有Al2O3与ZrO2陶瓷复合层的3层热障涂层.传统TBCs结构为Ni22Cr10AlY合金连接层和8%Y2O3部分稳定的ZrO2(8YPSZ)陶瓷顶层;3层TBCs中分别采用置于8YPSZ陶瓷层内层及外层的Al2O3与8YPSZ复合层.3种类型试样的100h,1050℃静态氧化试验及1050℃热震试验结果表明:3层涂层较双层涂层的氧化阻力提高,双层涂层的热震阻力最佳,氧化阻力最差.不同复合层形式试样的热振失效方式和寿命也有差别,复合层......
, Erosion and Surface Technology, University of Science and Technology Beijing摘 要:Porous a-Al2O3 thermal barrier coatings(TBCs) containing dispersed Pt... were mainly composed of α-Al2O3. The average thickness of the coatings was approximately 100 μm. Such single-layer TBCs exhibited not only excellent high-temperature cyclic oxidation and spallation......
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... to the total energy gives information on the failure modes (coating micro-failures and substrate micro-failures) associated with TBCs system. Key words: wavelet transform; acoustic emission; tensile......
than the two-layeredTBCs. The finite element method (FEM) numerical models were used to investigatestress and strain states in the GTBCs and traditional two-layered TBCs as they cooledto 750℃ from......