在大气环境中,测试7YSZ热障涂层抗1 000 ℃高温氧化性能,以模拟发动机叶片的巡航飞行高温氧化过程.采用交流阻抗技术并结合扫描电镜及X射线衍射系统研究了高温氧化过程中TGO层生长与YSZ层微结构演变.结果表明:随着氧化时间的增加,TGO层厚度增加符合抛物线规律,在中频阶段的阻抗谱响应愈加显著.YSZ熔融颗粒在较低测试温度下表现为容抗特征,随测试温度升高逐步表现为感抗特征.阻抗谱分析显示YSZ晶粒的电阻及电容随氧化时间增加,均呈一定幅度波动变化,高温氧化对熔融颗粒本身的电学特征影响不明显;随着氧化时间的增加,YSZ晶界电阻值不断增加,电容值不断下降,表明YSZ内微裂纹发生了生长和扩展,最终导致YSZ层的剥落失效.
参考文献
| [1] | 张小锋;周克崧;宋进兵;邓春明;牛少鹏;邓子谦.等离子喷涂-物理气相沉积7YSZ热障涂层沉积机理及其CMAS腐蚀失效机制[J].无机材料学报,2015(03):287-293. |
| [2] | Gurrappa I;Rao AS.Thermal barrier coatings for enhanced efficiency of gas turbine engines[J].Surface & Coatings Technology,20066(6):3016-3029. |
| [3] | 冯强;童锦艳;郑运荣;王美玲;魏文娟;赵海龙;袁晓飞;丁贤飞.燃气涡轮叶片的服役损伤与修复[J].中国材料进展,2012(12):21-34,11. |
| [4] | Ni, L.;Liu, C.;Zhou, C..A life prediction model of thermal barrier coatings[J].International Journal of Modern Physics, B. Condensed Matter Physics, Statistical Physics, Applied Physics,201015/16(15/16):3161-3166. |
| [5] | E. P. BUSSO;J. LIN;S. SAKURAI.A MECHANISTIC STUDY OF OXIDATION-INDUCED DEGRADATION IN A PLASMA-SPRAYED THERMAL BARRIER COATING SYSTEM[J].Acta materialia,20019(9):1529-1536. |
| [6] | R. Vaben;G. Kerkhoff;D. Stover.Development of a micromechanical life prediction model for plasma sprayed thermal barrier coatings[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20011/2(1/2):100-109. |
| [7] | Wei, S.;Fu-chi, W.;Qun-bo, F.;Zhuang, M..Lifetime prediction of plasma-sprayed thermal barrier coating systems[J].Surface & Coatings Technology,2013:39-45. |
| [8] | 张春霞;宫声凯;徐惠彬.交流阻抗谱法在热障涂层失效研究中的应用[J].航空学报,2006(3):520-524. |
| [9] | Song SH.;Xiao P..An impedance spectroscopy study of high-temperature oxidation of thermal barrier coatings[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,20031(1):46-53. |
| [10] | LIU Chao;HUANG Hui;NI Liyong;ZHOU Chungen.Evaluation of Thermal Barrier Coatings Exposed to Hot Corrosion Environment by Impedance Spectroscopy[J].中国航空学报（英文版）,2011(04):514-519. |
| [11] | Anderson PS;Wang X;Xiao P.Impedance spectroscopy study of plasma sprayed and EB-PVD thermal barrier coatings[J].Surface & Coatings Technology,20041(1):106-119. |
| [12] | Zhang CX;Zhou CG;Gong SK;Li HF;Xu HB.Evaluation of thermal barrier coating exposed to different oxygen partial pressure environments by impedance spectroscopy[J].Surface & Coatings Technology,20061/2(1/2):446-451. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%