用图形软件分析封严涂层金相照片计算孔隙率的方法

发布时间：2018-01-30 01:15

本文关键词： 封严涂层金相照片孔隙率图像分析法灰度处理阈值　出处：《电镀与涂饰》2017年22期 　论文类型：期刊论文

【摘要】：使用Image-Pro Plus 6.0结合Adobe Photoshop CS6软件分析AlSi/BN封严涂层的金相照片并计算其孔隙率。讨论了阈值选取方法和金相放大倍率对计算所得孔隙率的影响,并与用阿基米德法测得的孔隙率进行比较。对金相照片进行灰度处理,再调整对比度以便区分孔隙与非孔隙部分,从而确定阈值的方法以及采用50放大倍率比较合理。用图像分析法所得孔隙率略大于用阿基米德法所得孔隙率,但更接近封严涂层厂家提供的以定量金相法测得的孔隙率参考值。该方法简便、可靠,通过多区域确定阀值取其平均值可以有效保证结果的准确性。
[Abstract]:Using Image-Pro Plus 6.0 in conjunction with Adobe Photoshop. The CS6 software analyzes the metallographic photographs of the AlSi/BN seal coating and calculates its porosity. The method of threshold selection and the effect of metallographic magnification on the calculated porosity are discussed. Compared with the porosity measured by Archimedes method, the grayscale of the metallographic photographs is processed, and the contrast is adjusted to distinguish the porosity from the non-porous part. Therefore, the method of determining threshold and using 50 magnification are more reasonable. The porosity obtained by image analysis is slightly larger than that by Archimedes method. But it is closer to the reference value of porosity measured by quantitative metallographic method provided by the sealing coating manufacturer. The method is simple and reliable. The accuracy of the result can be effectively guaranteed by determining the threshold value in multiple regions and taking the average value.
【作者单位】：沈阳理工大学环境与化学工程学院;沈阳黎明航空发动机(集团)有限责任公司热表厂;沈阳黎明航空发动机(集团)公司技术中心;沈阳黎明航空发动机(集团)公司转包事业部;
【分类号】：TG115.21;TP391.41
【正文快照】： Al Si/BN封严涂层作为航空发动机中必不可少的功能性涂层,起到降低发动机能耗,简化气路密封,延长使用寿命等作用[1]。封严涂层主要由金属相、非金属相和孔隙三部分构成:金属相具有可喷涂、抗冲蚀、抗氧化等性能;非金属相使涂层具有可磨耗性、抗粘着和自润滑性能;孔隙不仅降低

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