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In situ Properties of 3-D Woven SiC/SiC-Based Composite

机译：3-D编织SiC / SiC基复合材料的原位性能

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摘要

In situ properties (Weibull fibre strength parameters, .S_o and m, fibre pull-out length distribution, and interfacial shear strength, τ) were determined for a 3-D woven SiC/SiC-based composite after tensile testing up to 1380 ℃ in air and vacuum - selected specimens had been impregnated with a proprietary glass sealant prior to mechanical testing. Unsealed specimens tested in vacuum and sealed specimens tested in air possessed in situ properties consistent with superior tensile properties observed previously, i.e...S_o>3 GPa. 4400 μm average fibre pull-out length. In contrast to this, in situ properties for unsealed specimens tested in air (1100 ℃ and 1200 ℃) suggested poor macroscopic mechanical properties, i.e.. .S_o<1.5 GPa, 250 MPa, and <100 μm average fibre pull-out length, as was indeed the case. Results were explained in terms of the fibre/matrix interface and oxidation protection ability of the glass sealant.
机译：在高达1380℃的温度下进行拉伸试验后，确定了3D机织SiC / SiC基复合材料的原位性能（威布尔纤维强度参数，S_o和m，纤维拉伸长度分布和界面剪切强度τ）。空气和真空-在进行机械测试之前，所选样品已用专有的玻璃密封剂浸渍。在真空中测试的未密封样品和在空气中测试的密封样品具有与先前观察到的优异拉伸性能一致的原位性能，即... S> 3 GPa。 4 400μm的平均纤维拉出长度。与此相反，在空气（1100℃和1200℃）中测试的未密封试样的原位性能表明其宏观力学性能较差，即.S_o <1.5 GPa，2 50 MPa和<100μm平均光纤拔出长度，确实如此。用玻璃纤维密封剂的纤维/基体界面和抗氧化保护能力解释了结果。

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