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热障涂层陶瓷层内部裂纹表征方法分析

董会1,李霄1,任越飞2,周勇1,姚建洮1

董会1,李霄1,任越飞2,周勇1,姚建洮1. 热障涂层陶瓷层内部裂纹表征方法分析[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390051
引用本文: 董会1,李霄1,任越飞2,周勇1,姚建洮1. 热障涂层陶瓷层内部裂纹表征方法分析[J]. 焊接学报, 2018, 39(2). DOI: 10.12073/j.hjxb.2018390051

热障涂层陶瓷层内部裂纹表征方法分析

  • 摘要: 采用梯度热循环试验和有限元分析相结合的方式定量表征了等离子喷涂热障涂层陶瓷层内部裂纹尺寸与涂层表面亮斑尺寸的关系. 单次热循环试验包括120 s加热和120 s冷却. 采用三维模型分析陶瓷层内部裂纹对涂层传热过程的影响. 结果表明,随着陶瓷层内部裂纹扩展其表面温度升高,影响区域增大,持续升高的温度为裂纹上方陶瓷层加速烧结提供了必要条件;陶瓷层表面亮斑形状是其内部裂纹形状的直观反映;亮斑尺寸与裂纹尺寸的关系与裂纹扩展位置无关,二者的尺寸基本相同,因此可将亮斑尺寸视作裂纹尺寸.
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  • 期刊类型引用(1)

    1. 董会,周攀虎,周勇,韩燕,王鹤屿,华万超. 脱粘裂纹形状与尺寸对热障涂层陶瓷层温度场的影响. 航空制造技术. 2021(10): 14-18 . 百度学术

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  • 收稿日期:  2017-05-19

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