强流脉冲电子束粘结层表面改性对热障涂层热震及残余应力的影响

doi:10.11896/j.issn.1005-023X.2018.24.017

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (3195KB)
Export: BibTeX | EndNote (RIS)

Abstract Thermal sprayed CoCrAlY layer was prepared by air plasma spray on the surface of Ni-based superalloy GH4169. Nano Al film was deposited on the surface of CoCrAlY by electron beam evaporation and then its surface was modified by high current pulsed electron beam. Finally, the modified thermal barrier coating was prepared by depositing ceramic layer on the CoCrAlY surface by APS. The thermal shock test, bonding strength test and residual stress analysis were conducted on the coatings after bon-ding layer surface modification by Al deposition and the ordinary coatings. The results indicated that the modified coatings present better thermal shock resistance than that of the ordinary coatings after 1 050 ℃heating and then 10 ℃ water quenching. The residual stress produced by the thermally grown oxide (TGO) of modified coatings and ordinary coatings in the process of thermal shock were both press stress, and the residual press stress increased with the increasing thermal shock cycles. In addition, the growth rate of residual press stress in TGO of modified coatings was lower than that of the ordinary coatings. The tensile test result showed that the fracture of the ordinary coating belonged to mixed fracture, while the fracture of the modified coating occurred in the interface between the ceramic layer and the film adhesive, and the interlaminar fracture was not found. The modified coatings exhibited more favorable bonding strength than ordinary coating. In conclusion, the service life of thermal barrier coatings in cold and thermal cycles can be dramatically prolonged by combined surface modification of molten Al film in the bonding layer through electric beam vacuum deposition and high current pulsed electron beam technology.

Key words： thermal barrier coatings high current pulsed electron beam nano Al film thermal shock residual stress

Published: 23 January 2019

CLC number:

TG174.4

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	HAN Zhiyong
	QIU Zhenzhen
	SHI Wenxin

Cite this article:

HAN Zhiyong,QIU Zhenzhen,SHI Wenxin. Effect of Surface Modification of Bonding Layers by High Current Pulsed Electron Beam on Thermal Shock Failure and Residual Stress of Thermal Barrier Coatings[J]. Materials Reports, 2018, 32(24): 4303-4308.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.24.017 OR http://www.mater-rep.com/EN/Y2018/V32/I24/4303

1 Beck T, Trunova O, Herzog R, et al. TBCs for gas turbines under thermomechanical loadings: Failure behaviour and life prediction[J].Energy and Power Engineering,2013,7:647.
2 Jamali H, Mozafarinia R, Razavi R S, et al. Comparison of thermal shock resistances of plasma-sprayed nanostructured and conventional yttria stabilized zirconia thermal barrier coatings[J].Ceramics International,2012,38(8):6705.
3 Daroonparvar M, Yajid M A M, Yusof N M, et al. Investigation of three steps of hot corrosion process in Y₂O₃ stabilized ZrO₂ coatings including nano zones[J].Journal of Rare Earths,2014,32(10):989.
4 Li M H, Zhang Z Y, Sun X F, et al. Failure mechanism of EB-PVD thermal barrier coating subjected to thermal cycling[J].Journal of Materials Engineering,2002(8):20(in Chinese).
李美姮,张重远,孙晓峰,等.EB-PVD热障涂层的热循环失效机理[J].材料工程,2002(8):20.
5 Cai J. Growth behavior and stress characteristics of thermally grown oxide in thermal barrier coatings irradiated by high current pulsed electron beam[D].Zhenjiang:Jiangsu University,2015(in Chinese).
蔡杰.强流脉冲电子束作用下热障涂层热生长氧化物生长行为与应力状态[D].镇江:江苏大学,2015.
6 Wright P, Evans A. Mechanisms governing the performance of thermal barrier coatings[J].Current Opinion Solid State and Materials Science,1999,4(3):255.
7 Evans A G, Mumm D, Hutchinson J, et al. Mechanisms controlling the durability of thermal barrier coatings[J].Progress in Materials Science,2001,46(5):505.
8 Han Z Y, Han J, Jing Z Z. Surface microstructure of aluminized CoCrAlY coating irradiated by high current pulsed electron beam[J].Transactions of the China Welding Institution,2016,37(11):31(in Chinese).
韩志勇,韩剑,靖珍珠.HCPEB作用下镀铝CoCrAlY涂层的表面微观结构状态[J].焊接学报,2016,37(11):31.
9 Jing Z Z. Effects of surface aluminium distribution on the high temperature oxidation behaviors of MCrAlY bond coat[D]. Tianjin: Civil Aviation University of China, 2016(in Chinese).
靖珍珠. 表面铝分布对MCrAlY粘结层高温氧化行为的影响[D]. 天津:中国民航大学, 2016.
10 杨序纲,吴琪琳.拉曼光谱的分析与应用[M].北京:国防工业出版社,2008.
11 Qiu M, Mao W G, Dai C Y, et al. Micro Raman spectroscopy technique applications to measure stress fields in thermal barrier coatings[J].Journal of Changsha Communications University,2006,22(2):76(in Chinese).
邱明,毛卫国,戴翠英,等.热障涂层应力场的微拉曼光谱技术测试研究[J].长沙交通学院学报,2006,22(2):76.
12 Han Z Y, Z H, Wang Z P. Study of residual stress of thermal barrier coatings by Raman spectroscopy and numerical analysis[J].Acta Aeronautica et Astronautica Sinica,2012,33(2):369(in Chinese).
韩志勇,张华,王志平.热障涂层残余应力的拉曼光谱测量及数值分析[J].航空学报,2012,33(2):369.
13 Cai J, Raptis Y S, Anastassakis E. Stabilized cubic zirconia: A Raman study under uniaxial stress[J].Applied Physics Letters,1993,62(22):2781.
14 Li Y, Cai J, Lv P, et al. Surface microstructure and stress state in pure titanium after high-current pulsed electron beam[J].Physical Science Journal,2012,61(5):056105(in Chinese).
李艳,蔡杰,吕鹏,等.强流脉冲电子束诱发纯钛表面的微观结构及应力状态[J].物理学报,2012,61(5):056105.