Fiber Reinforced Plastics/Composites ›› 2018, Vol. 0 ›› Issue (1): 60-67.

• APPLICATION RESEARCH • Previous Articles     Next Articles

INFLUENCE OF ELECTROPHORETIC DEPOSITION TIME ON SiCf/SiC COMPOSITES PROPERTIES

HOU Hui-ning, ZHOU Xin-gui, LI Ming-yuan   

  1. Key Laboratory of Advanced Ceramic Fibers & Composites, National University of Defense Technology, Changsha 410073, China
  • Received:2017-10-09 Online:2018-01-20 Published:2018-01-20

Abstract: This paper pays attention to the hybrid method of Electrophoretic Deposition (EPD) and Precursor Infiltration and Pyrolysis (PIP) for fabricating the SiCf/SiC composites. Influence of deposition time on SiCf/SiC composites is analyzed. It is concluded that SiC fibers would be gradually corroded with EPD time prolonged, and the fibers′ peak strength would decrease as well. While, the existence of PyC interphases in front of the SiC fibers would effectively protect the SiC fibers. Because of the electric power of EPD suspension, interfacial strength between PyC interphases and SiC fibers would drop slightly. Therefore, the peak strength of SiC fibers would increase at first then decrease with EPD time. 5 min EPD and 9 cycles PIP result in a maximum bending strength of 731 MPa for SiCf/SiC composites. After that, its mechanical property first dropped then grew a little with EPD time. Thermal conductivity of SiCf/SiC composites rose first and then fell with EPD time. With 10 min EPD, thermal conductivity of SiCf/SiC composites in room temperature reaches the maximum of 4.658 W/(m·K).

Key words: EPD, PIP, SiCf/SiC composites

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