Processing of carbon-fiber reinforced (SiC plus ZrC) mini-composites by soft-solution approach and their characterization

作者：Padmavathi N^*; Kumari Sweety; Prasad V V Bhanu; Subrahmanyam J; Ray K K

来源：Ceramics International, 2009, 35(8): 3447-3454.

DOI：10.1016/j.ceramint.2009.06.016

• Composites
• Fibres
• Mechanical properties
• Carbon
• Soft-solution approach

Carbon-fiber reinforced (SiC ZrC) mini-composites have been prepared via soft-solution process using inorganic precursors. In this process, water-soluble compounds have been used to act as precursor materials to impregnate the fiber tow. Thermal analysis provided the temperature range for the pyrolysis to convert the precursors into the desired (SiC ZrC) matrix. X-ray diffraction of the composites confirmed the phase formation and the crystallite size of these phases were in the range of 25-40 nm. Cross-sectional microstructures of the composites have shown the matrix formation around each individual fiber. The mechanical properties revealed that the tensile strength and fracture energy of the composites pyrolyzed at 1600 degrees C were significantly higher with typical composite failure behavior, as compared to those pyrolyzed at 1700 degrees C. The statistical size effects of the tensile strength were investigated on the basis of the Weibull statistics.

• 出版日期2009-12