Microstructure and Mechanical Property of 2.5D C/SiCN Composite

Abstract:

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Carbon fiber reinforced silicon carbonitride ceramic composite (C/SiCN) was prepared by rapid electro-thermal pyrolysis chemical vapor deposition using liquid hexamethyldisilazane as precursor. The density of C/SiCN is 1.75g/cm3 and with 15% porosity. Microstructure characteristics of C/SiCN were examined by transmission electron microscopy and scanning electron microscope equipped with energy dispersive spectrometer. The mechanical properties were characterized by three-point bending test. Microstructure observation displays a high degree of coalescence between SiCN matrix and fiber filaments, but there also exist plenty of micro-pores within fiber bundle. It is different from that of C/SiC composite made by chemical vapor infiltration. Mechanical test exhibits a mostly obvious nonlinear fracture behavior, which can be explained by typical toughening mechanism of long fiber-reinforced ceramic matrix composite.

Info:

Periodical:

Advanced Materials Research (Volumes 79-82)

Edited by:

Yansheng Yin and Xin Wang

Pages:

1499-1502

DOI:

10.4028/www.scientific.net/AMR.79-82.1499

Citation:

Y. Xia et al., "Microstructure and Mechanical Property of 2.5D C/SiCN Composite", Advanced Materials Research, Vols. 79-82, pp. 1499-1502, 2009

Online since:

August 2009

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Price:

$35.00

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