采用气体喷砂试验机研究了大气等离子喷涂(APS) ZrO2-7％Y2O3(7YSZ)热障涂层的冲蚀失效机理,分析了陶瓷层表面粗糙度对热障涂层冲蚀磨损率及失效行为的影响,研究了基于多孔层状的热障涂层在常温高速粒子90°攻角下的冲蚀失效特征,探讨了多孔层状结构对涂层冲蚀失效演变机制的作用,此外,建立了基于粗糙度的冲蚀失效数学模型.研究结果表明:冲蚀磨损率与陶瓷层表面粗糙度呈线性递增关系;涂层在高速粒子冲蚀下多孔层状结构加剧了涂层的冲蚀失效;涂层表面在粒子冲蚀下承受着非均匀、非连续的压-压脉动循环载荷,在微凸粗糙表面承载着正应力和切应力的相互作用;正应力迫使涂层出现凹坑,切应力易导致涂层出现沟槽,并同时以原喷涂态表面网状裂纹为策源地诱发裂纹在粒子晶界和层间界面萌生扩展导致涂层产生粒子和片状剥落,最终涂层显示出典型的磨粒磨损和低周疲劳失效形式.
参考文献
| [1] | HUA JIA-JIE,ZHANG LI-PENG,LIU ZI-WEi,et al.Progress of research on mechanism of thermal barrier coatings.Journal of Inorganic Materials,2012,27(7):680-685. |
| [2] | GONG WEN-BIAO,LI YU-PENG,LIU WEI,et al.Preparation and high-temperature properties of nanostructured CeO2/ZrO2Y2O3 thermal barrier coating.Journal ofInorganic Materials,2010,25(8):860-864. |
| [3] | GUO HONG-BO,GONG SHENG-KAI,XU HUI-BIN.Progress in thermal barrier coatings for advanced aeroengines.Materials China,2009,28(9/10):18-26. |
| [4] | YANG LI,ZHOU YI-CHUN,QI SHA-SHA.Research progress in erosion mechanisms of thermal barrier coatings.Advances in Mechanics,2012,25(6):704-719. |
| [5] | CHEN X,HE M Y,SPITSBERG I,et al.Mechanisms governing the high temperature erosion of thermal barrier coatings.Wear,2004,256(7/8):735-746. |
| [6] | WATANABE M,XU T,LEVI C G,et al.Shear band formation in columnar thermal oxides.Acta Materialia,2005,53(13):3765-3773. |
| [7] | SUN JIA-SHU,WANG XIAO-TONG,GUO DA-ZHAN.Impacterosion wear characteristics and mathematic model of plasma spray ceramic coatings by solid particles.Tribology,1994,14(1):57-64. |
| [8] | WANG HAI-JUN,CAI JIANG,HAN ZHI-HAI.Study on erosion wearof WC-Co coatings prepared by supersonic plasma spray and HVOF spray.Journal of Materials Engineering,2005,49(4):50-54. |
| [9] | LI YANG,LI SHU,LIU YANG,et al.Effect of porosity and laminar structure on erosion resistance of WC-Co-Cr Coatings.Tribology,2011,31(3):228-234. |
| [10] | ZHANG C L,ZOU X Y,GONG J R,et al.Aerodynamic roughness of cultivated soil and its influences on soil erosion by wind in a wind runnel.Soil & Tillage Research,2004,75(1):53-59. |
| [11] | WANG REN-ZHI.Overview on the shot peening principle and its strengthening mechanisms for metallic materials.China Surface Engineering,2012,25(6):1-9. |
| [12] | WELLMAN R G,NICHOLLS J R.A review of the erosion of thermal barrier coatings.J.Phys.D:Appl.Phys.,2007,40(16):293-305. |
| [13] | POHL M,STELLA J.Quantitative CLSM roughness study on early cavitation-erosion damage.Wear,2002,252(5/6):501-511. |
| [14] | RAUPACH M R.The effect of roughness elements on wind erosion threshold.Journal of Geophysical Research,1993,98(2):3023-3029. |
| [15] | CHEN X,WANG R,YAO N,et al.Foreign object damage in a thermal barrier system:mechanisms and simulations.Materials Science and Engineering A,2003,352(1):221-231. |
| [16] | LI C J,LI Y,YANG G J,et al.A novel plasma-sprayed durable thermal barrier coating with a well bonded YSZ interlayer between porous YSZ and bond coat.Journal of Thermal Spray Technology,2012,21(3/4):383-389. |
| [17] | EVANS A G,FLECK N A,FAULHABER S,et al.Scaling laws governing the erosion and impact resistance of thermal barrier coatings.Wear,2006,260(7/8):886-894. |
| [18] | RAMANUJAM N,NAKAMURA T.Erosion mechanisms of thermally sprayed coatings with multiple phases.Surface and Coatings Technology,2009,204(1/2):42-53. |
| [19] | CHEN X,HUTCHINSON J W.Particle impact on metal substrates with application to foreign object damage to aircraft engines.Journal of the Mechanics and Physics of Solids,2002,50(12):2669-2690. |
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%