脱粘裂纹形状与尺寸对热障涂层陶瓷层温度场的影响  

Temperature Distribution of Ceramic Top-Coat in Thermal Barrier Coatings Via Delamination Crack Shape and Size

作　　者：董会[1] 周攀虎 周勇[1] 韩燕 王鹤屿 华万超 DONG Hui;ZHOU Panhu;ZHOU Yong;HAN Yan;WANG Heyu;HUA Wanchao(Xi’an Key Laboratory of High Performance Oil and Gas Field Materials,School of Material Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;State Key Laboratory of Performance and Structure Safety for Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi’an 710077,China)

机构地区：[1]西安石油大学材料科学与工程学院,西安市高性能油气田材料重点实验室,西安710065 [2]中国石油集团石油管工程技术研究院,石油管材及装备材料服役行为与结构安全国家重点实验室,西安710077

出　　处：《航空制造技术》2021年第10期14-18,共5页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(51904331);陕西省自然科学基金(2020JM540);西安交通大学金属材料强度国家重点实验室项目(20202210);西安石油大学材料科学与工程省级优势学科项目(YS37020203)。

摘　　要：采用有限元模拟表征了热障涂层陶瓷层内部不同裂纹形状与涂层表面亮斑形状及尺寸的关系。结果表明,裂纹长度小于1mm时,裂纹的形状效应对陶瓷层表面温度分布和温度高低影响不明显;当裂纹长度超过1mm时,陶瓷层表面亮斑的形状逐渐遵循其内部脱粘裂纹的形状,且裂纹边缘效应(角度越小)越大,其上方陶瓷层表面亮斑形状变化越趋于内部脱粘裂纹形状。不同形状裂纹尺寸和面积对其上方陶瓷层表面最高温度值影响不同,随着裂纹尺寸和面积增加,3种形状裂纹上方陶瓷层表面最高温度也会增加,裂纹尺寸超过0.5mm后,3种裂纹表面温度差值也逐渐增大,圆形裂纹表面温度升高最为显著。因此陶瓷层表面亮斑的尺寸能反映其内部裂纹的实际尺寸大小,且亮斑尺寸与其内部裂纹尺寸之间的关系不受裂纹形状、位置等因素影响。The finite element simulation was used to characterize the relationship between different crack shapes in the thermal barrier coating ceramic top-coat and the shape and size of bright spots on the coating surface.The results show that when the crack length is less than 1mm,the shape effect of the crack has no obvious effect on the surface temperature distribution and size of coating ceramic top-coat.When the crack length exceeds 1mm,the shape of the bright spot on the surface of the ceramic top-coat gradually follows the shape of the internal delamination crack,and the larger the crack edge effect(the smaller the angle),the more the shape change of the bright spot on the ceramic top-coat surface above it tends to the shape of the internal delamination crack.Different shape crack size and area have different effects on the maximum temperature of the ceramic top-coat above the crack.With the increase of crack size and area,the maximum temperature of the ceramic top-coat above the three shape cracks increases.When the crack size exceeds 0.5mm,the difference of surface temperature of the three cracks gradually increases,and the increase of surface temperature of cylindrical crack is the most significant.Therefore,the size of the bright spot on the surface of the ceramic top-coat can reflect the actual size of the internal crack,and the relationship between the bright spot size and the internal crack size is not affected by the crack shape,location and other factors.

关 键 词：热障涂层 裂纹形状 温度分布 亮斑 氧化钇稳定氧化锆(YSZ) 

分 类 号：TQ174.1[化学工程—陶瓷工业] V263[化学工程—硅酸盐工业]