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Effects of matrix cracking on the creep of SiC-SIC microcomposites

机译：基质裂纹对SiC-SiC微型复合材料蠕变的影响

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Thc creep behavior of SiC/C/SiC microcomposites at 1200-1400°C and 140-450 MPa was investigated in the presence and absence of matrix cracking. The microcomposites consisted of single Hi-Nicalon fibers coated with a CVD carbon interlayer and a CVD SiC matrix. Since the fibers and matrix had been examined by the same experimental technique, direct comparisons of the creep of the composite and of the constituents were performed. The creep of uncracked microcomposites was successfully modeled using asimple rule of mixtures algorithm. When matrix cracks were present the microcomposites were modeled using a series composite consisting of intact microcomposite, exposed fiber at the matrix crack, and thc debonded region between these first two regions.
机译：在存在和没有基质裂解的情况下研究了1200-1400°C和140-450MPa的SiC / C / SiC微锁的THC蠕变行为。微孔复合材料由涂有CVD碳中间层和CVD SiC基质的单邻纤维组成。由于通过相同的实验技术检查了纤维和基质，因此进行了复合材料和成分的蠕变的直接比较。利用混合物算法的ASIMPLE规则成功建模了未填充的微孔复合材料的蠕变。当存在矩阵裂缝时，使用由基质裂纹的完整微型复合，暴露纤维组成的系列复合材料进行模拟微孔复合材料，并且在这些前两个区域之间的THC剥离区域。

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