Statistically sound application of fiber push-out method for the study of locally non-uniform interfacial properties of SiC-SiC fiber composites
Statistically sound application of fiber push-out method for the study of locally non-uniform interfacial properties of SiC-SiC fiber composites
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DOI：
10.1016/j.jeurceramsoc.2019.11.041
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发表时间：
2020-04
影响因子：
5.7
通讯作者：
A. Hussey;R. D. De Meyere;C. Deck;David J Armstrong;Y. Zayachuk
中科院分区：
文献类型：
--
作者：
A. Hussey;R. D. De Meyere;C. Deck;David J Armstrong;Y. Zayachuk
对具有单层和多层热解碳纤维基体界面的SiC-SiC纤维复合材料进行了推出试验。结果表明，实验分散是显着的，大量的测试是必要的，以获得统计相关的界面剪切强度值。观察到单个纤维丝束的区域之间的差异，其与局部孔隙率有关。界面脱粘沿着纤维和第一碳层之间的边界发生，而与界面相的结构无关，因此界面剪切强度与界面相的结构没有直接联系。
Push-out tests were performed on SiC-SiC fiber composites with single- and multi-layered pyrolytic carbon fiber-matrix interphases. It is shown that experimental scatter is significant and a large number of tests is necessary in order to obtain statistically relevant values of interfacial shear strength. A difference between the regions of an individual fiber tow is observed, linked to local porosity. Interfacial debonding occurs along the boundary between the fiber and the first carbon layer, regardless of the structure of the interphase, and therefore interfacial shear strength is not directly linked to the structure of the interphase.