全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

CMAS环境下电子束物理气相沉积热障涂层的热循环行为及失效机制

, PP. 76-82

Keywords: 热障涂层,循环热冲击,CMAS,互反应区,失效

Full-Text   Cite this paper   Add to My Lib

Abstract:

航空发动机涡轮叶片工作时表面经常产生CaO-MgO-Al2O3-SiO2(简称CMAS)等沉积物。本文中研究了电子束物理气相沉积(EB-PVD)制备ZrO2热障涂层(TBCs)在CMAS环境下的热循环行为及失效机制。结果表明,在1200℃热冲击条件下,表面涂覆CMAS的热障涂层的热循环寿命低于100次,而未涂覆CMAS的涂层寿命达到500次以上,CMAS的存在加速了热障涂层的剥落失效。在1200℃经过210次循环后,ZrO2陶瓷层与CMAS之间形成了约8μm厚的互反应区,其形成主要与CMAS中Ca2+内扩散有关。CMAS环境下热障涂层陶瓷层产生大量横向裂纹,涂层的失效主要以陶瓷层片状剥落为主。

References

[1]  Miller R A. Thermal barrier coatings for aircraft engines: History and directions [J]. Journal of Thermal Spray Technology, 1997, 6(1): 35-42.
[2]  Meier S M, Gupta D K. The evolution of thermal barrier coatings in gas turbine engine applications [J]. Journal of Engineering for Gas Turbines and Power, 1994, 116(1): 250-257.
[3]  Padture N P, Gell M, Jordan E H. Thermal barrier coatings for gas-turbine engine applications [J]. Science, 2002, 296: 280-284.
[4]  Strangman T, Raybould D, Jameel A, et al. Damage mechanisms, life prediction, and development of EB-PVD thermal barrier coatings for turbine airfoils [J]. Surface and Coatings Technology, 2007, 202(4-7): 658-664.
[5]  Hutchinson J W, Evans A G. On the delamination of thermal barrier coatings in a thermal gradient [J]. Surface and Coatings Technology, 2002, 149(2/3): 179-184.
[6]  Wu R T, Osawa M, Yokokawa T, et al. Degradation mechanisms of an advanced jet engine service-retired TBC component [J]. Journal of Solid Mechanics and Materials Engineering, 2010, 4(2): 119-130.
[7]  Wright P K, Evans A G. Mechanisms governing the performance of thermal barrier coatings [J]. Current Opinion in Solid State and Materials Science, 1999, 4(3): 255-265.
[8]  Kim J, Dunn M G, Baran A J, et al. Deposition of volcanic materials in the hot sections of two gas turbine engines [J]. Journal of Engineering for Gas Turbines and Power, 1993, 115(3): 641-651.
[9]  Stott F H, Wet de D J, Taylor D J. Degradation of thermal-barrier coatings at very high temperatures [J]. MRS Bulletin, 1994, 19(10): 46-49.
[10]  Borom M P, Johnson C A, Peluso L A. Role of environmental deposits and operating surface temperature in spallation of air plasma sprayed thermal barrier coatings [J]. Surface and Coatings Technology, 1996, 86/87(1-3): 116-126.
[11]  Kr mer S, Yang J, Levi C G, et al. Thermochemical interaction of thermal barrier coatings with molten CaO-MgO-Al2O3-SiO2 [J]. Journal of the American Ceramic Society, 2006, 89(10): 3167-3175.
[12]  Chen X. Calcium-magnesium-alumina-silicate (CMAS) delamination mechanisms in EB-PVD thermal barrier coatings [J]. Surface and Coatings Technology, 2006, 200(11): 3418-3427.
[13]  Evans A G, Hutchinson J W. The mechanics of coating delamination in thermal gradients [J]. Surface and Coatings Technology, 2007, 201(18): 7905-7916.
[14]  Wu J, Guo H, Gao Y, et al. Microstructure and thermo-physical properties of yttria stabilized zirconia coatings with CMAS deposits [J]. Journal of the European Ceramic Society, 2011, 31(10): 1881-1888.
[15]  Smialek J L, Archer F A, Garlick R G. Turbine airfoil degradation in the Persian Gulf war [J]. JOM Journal of the Minerals Metals and Materials Society, 1994, 46(12): 39-41.
[16]  Garvie R C, Nicholson P S. Structure and thermomechanical properties of partially stabilized zirconia in the CaO-ZrO2 system [J]. Journal of the American Ceramic Society, 1972, 55(3): 152-157.
[17]  Suresh A, Mayo M J, Porter W D. Thermodynamics of the tetragonal-to-monoclinic phase transformation in fine and nanocrystalline yttria-stabilized zirconia powders [J]. Journal of Materials Research, 2003, 18(12): 2912-2921.
[18]  Liu H C, Murarka S P. Elastic and viscoelastic analysis of stress in thin films [J]. Journal of Applied Physics, 1992, 72(8): 3458-3463.
[19]  Hsueh C H. Modeling of elastic deformation of multilayers due to residual stresses and external bending [J]. Journal of Applied Physics, 2002, 91(12): 9652-9656.
[20]  Ingel R P, Lewis Ⅲ D. Lattice parameters and density for Y2O3-stabilized ZrO2 [J]. Journal of the American Ceramic Society, 1986, 69(4): 325-332.
[21]  Schulz U. Phase transformation in EB-PVD yttria partially stabilized zirconia thermal barrier coatings during annealing [J]. Journal of the American Ceramic Society, 2000, 83(4): 904-910.
[22]  张丹华, 王 璐, 郭洪波, 等. 多元稀土氧化物掺杂二氧化锆基陶瓷材料的热物理性能 [J]. 复合材料学报, 2011, 28(2): 179-184. Zhang Danhua, Wang Lu, Guo Hongbo, et al. Thermophysical properties of multiple rare earth oxide co-doped zirconia-based ceramic materials [J]. Acta Materiae Compositae Sinica, 2011, 28(2): 179-184.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133