CMAS渗入对等离子喷涂YSZ热障涂层形貌的影响

被引:18
作者
何箐 [1 ]
刘新基 [1 ]
柳波 [2 ]
吕玉芬 [1 ]
汪瑞军 [1 ]
王伟平 [1 ]
机构
[1] 中国农业机械化科学研究院北京金轮坤天特种机械有限公司
[2] 贵州黎阳航空动力有限公司
关键词
CMAS沉积物; YSZ; 热障涂层; 失效;
D O I
暂无
中图分类号
TG174.442 [喷镀法];
学科分类号
摘要
研究了等离子喷涂不同结构YSZ涂层在CMAS渗入作用下的形貌演变规律。对带有模拟CMAS沉积物的YSZ涂层进行高温热处理试验,并在低CMAS输送量条件下对YSZ涂层进行冲刷试验,试验后涂层均出现了严重的层间剥离失效。通过试验前后涂层的截面形貌及Raman光谱分析,结果表明:涂层的显微形貌变化主要表现在高温下熔融态CMAS沿涂层表面微裂纹和孔隙渗入内部,引起YSZ陶瓷层孔隙收缩、表层致密化,同时在涂层表面粘附的CMAS耦合作用下,YSZ涂层表层中产生大量横向微裂纹和明显分层;另外,YSZ涂层表层在CMAS中溶解并导致YSZ加速相变失稳也是影响涂层形貌变化和过快失效的因素之一。CMAS沉积层厚度增加时,同等条件下CMAS对涂层失效的影响会加剧。
引用
收藏
页码:42 / 48
页数:7
相关论文
共 9 条
[1]   先进航空发动机热障涂层技术研究进展 [J].
郭洪波 ;
宫声凯 ;
徐惠彬 .
中国材料进展, 2009, 28(Z2) (Z2) :18-26
[2]   等离子喷涂常规和纳米8YSZ热障涂层的性能 [J].
何箐 ;
吕玉芬 ;
汪瑞军 ;
李宏 .
中国表面工程, 2008, (06) :18-22
[3]  
Degradation of Thermal Barrier Coatings by Fuel Impurities and CMAS: Thermochemical Interactions and Mitigation Approaches[J] . Prabhakar Mohan,Travis Patterson,Bo Yao,Yongho Sohn.Journal of Thermal Spray Technology . 2010 (1)
[4]  
Failure of Thermal Barrier Coatings Subjected to CMAS Attack[J] . L. Li,N. Hitchman,J. Knapp.Journal of Thermal Spray Technology . 2010 (1)
[5]  
Mechanisms of cracking and delamination within thick thermal barrier systems in aero-engines subject to calcium-magnesium-alumino-silicate (CMAS) penetration[J] . Materials Science & Engineering A . 2008 (1)
[6]   Novel thermal barrier coatings that are resistant to high-temperature attack by glassy deposits [J].
Aygun, Aysegul ;
Vasiliev, Alexander L. ;
Padture, Nitin P. ;
Ma, Xinqing .
ACTA MATERIALIA, 2007, 55 (20) :6734-6745
[7]  
Progress in coatings for gas turbine airfoils[J] . G.W Goward.Surface & Coatings Technology . 1998
[8]  
Role of environment deposits and operating surface temperature in spallation of air plasma sprayed thermal barrier coatings[J] . Marcus P. Borom,Curtis A. Johnson,Louis A. Peluso.Surface & Coatings Technology . 1996
[9]   TURBINE AIRFOIL DEGRADATION IN THE PERSIAN-GULF-WAR [J].
SMIALEK, JL ;
ARCHER, FA ;
GARLICK, RG .
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1994, 46 (12) :39-41