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Mechanical Properties and Microstructure of 2.5D Cf/ZrO2 Composites Prepared by Precursor Infiltration and Pyrolysis
Abstract:
The 2.5D Cf/ZrO2 composites were fabricated by precursor infiltration and pyrolysis (PIP) with ZrO2 precursor slurry as an impregnation liquid and 2.5D carbon preform as a framework. The effect of cycles of infiltration-pyrolysis on mechanical properties and microstructure of composites was investigated. The results showed that with the increase of cycles of infiltration-pyrolysis the flexural strength and relative density of as-prepared 2.5D Cf/ZrO2 composites increased. After 15 cycles of infiltration-pyrolysis, the density and flexural strength of as-prepared composites were 2.53±0.04g/cm3 and 73.2±2.2MPa respectively. In addition, the specimens with higher densification can transfer load efficiently between ZrO2 and carbon fiber, result in good mechanical properties of composites.
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639-643
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July 2016
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© 2016 Trans Tech Publications Ltd. All Rights Reserved
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