不同预制体的SiC/SiC复合材料在湿氧环境下长期氧化行为的无损评估方法

Non-Destruction Evaluation Method for Long-Term Oxidation Behavior of SiC/SiC Composites with Different Preforms in Wet Oxygen.

作者信息

Sun Guodong, Wu Yan, Luan Xin'gang, Xu Xinming, Cao Xinxin, Zhang Jiahao, Zhao Huan, Zhang Qing, Cheng Laifei

机构信息

School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.

Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an 710072, China.

出版信息

Materials (Basel). 2022 May 27;15(11):3812. doi: 10.3390/ma15113812.

DOI:10.3390/ma15113812

PMID:35683111

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9181604/

Abstract

The implementation of SiC fiber reinforced SiC/SiC composites to aero-engine hot components has attracted wide attention, due to their many excellent properties. Along these lines, in order to predict the oxidation behavior of the material in extreme environments and to explore the effect of different preforms on the oxidative behavior of the composites, four SiC/SiC composites, with different preforms, were oxidized under environmental conditions of pressure of 12 kPa HO:8 kPa O:80 kPa Ar, at 1400 °C temperature. Moreover, the morphology and defect distribution of the samples were characterized by carrying out scanning electron microscopy, and micro-computed X-ray tomography measurements. Furthermore, the relation between the micro- and macro-scales was established, so as to be able to predict the oxidation behavior of the composites; not only the quantitative relationship between the mass change rate and the defect volume change rate, but also the combination of micro-computed X-ray images.

摘要

由于具有许多优异性能，碳化硅纤维增强碳化硅/碳化硅复合材料在航空发动机热部件上的应用已引起广泛关注。为此，为了预测该材料在极端环境中的氧化行为，并探究不同预制体对复合材料氧化行为的影响，制备了四种具有不同预制体的碳化硅/碳化硅复合材料，在1400℃、压力为12 kPa H₂O:8 kPa O₂:80 kPa Ar的环境条件下进行氧化。此外，通过扫描电子显微镜和微计算机X射线断层扫描测量对样品的形貌和缺陷分布进行了表征。此外，还建立了微观和宏观尺度之间的关系，以便能够预测复合材料的氧化行为；不仅包括质量变化率与缺陷体积变化率之间的定量关系，还包括微计算机X射线图像的组合。