摘要
在机械性能中,弹性模量对于涂层的功能寿命长短有很大的影响,准确地获取涂层的弹性模量是研究涂层的前提。本文针对涂层的微观形貌特征,提出了一种有效的弹性模量的计算方法。首先通过分析研究其扫描电镜图像,对其进行图像处理,再基于有限元分析软件ABAQUS建立涂层微观结构的2D模型,施加周期性边界,利用直接均匀化方法研究其弹性模量。并对比实验测试值,验证了计算方法的可靠性。
Here,we theoretically addressed the elastic modulus of the yttriastabilized zirconia （YSZ） coatings. The impact of the surface microstructures （mainly including the pores and cracks） of the YSZ coatings, synthesized by plasma spraying and characterized with scanning electron microscopy, on the elastic modulus was mathematically modeledin 2D approximation with periodic boundaries,numerically simulated in finite element method with software ABAQUS, analytically derived in direct homogenization, and experimentally investigated. The simulated and meas- ured results were found to be in good agreement with a discrepancy below 4% ,indicating that the novel simulation works fairly well. We suggest that the elastic modulus of YSZ coatings may be simply estimated in terms of the pro- cessed SEM images of the microstructures.
出处
《真空科学与技术学报》
CSCD
北大核心
2017年第5期494-498,共5页
Chinese Journal of Vacuum Science and Technology
关键词
涂层
弹性模量
微观结构
周期性边界
ABAQUS
Here,we theoretically addressed the elastic modulus of the yttriastabilized zirconia （YSZ） coatings. The impact of the surface microstructures （mainly including the pores and cracks） of the YSZ coatings, synthesized by plasma spraying and characterized with scanning electron microscopy, on the elastic modulus was mathematically modeledin 2D approximation with periodic boundaries,numerically simulated in finite element method with software ABAQUS, analytically derived in direct homogenization, and experimentally investigated. The simulated and meas- ured results were found to be in good agreement with a discrepancy below 4% ,indicating that the novel simulation works fairly well. We suggest that the elastic modulus of YSZ coatings may be simply estimated in terms of the pro- cessed SEM images of the microstructures.
