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Preparation of Si-B-C System Powder Using Silicon, Boron, and Boron Carbide

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Abstract:

Boron carbide composites in Si-B-C System have been widely studied and applied in excellent engineering materials. These materials are usually used at high temperature. Unfortunately, amorphous Si-B-C ceramics have been few reports regarding the properties of Si-B-B4C ceramics. In this study, the preparation of crystallized Si-B-C system compounds using Si, B, and B4C powders was investigated to determine their potentially for applications as high hardness composites. The samples were prepared at 1673 K for 2 hours in Ar atmosphere. The sintered bodies were cut into 5 х 5 х 10 mm blocks and polished with diamond disk for Vickers hardness. The samples were subjected to X-ray diffraction (XRD) analysis for phase evolution using a powder X-ray diffractometer. The fracture surfaces of the specimens were observed using a scanning electron microscope (SEM) included an energy dispersive X-ray fluorescence spectrometer (EDX) system to estimate the microstructures.

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Periodical:

Materials Science Forum (Volumes 544-545)

Pages:

933-936

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.544-545.933

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Online since:

May 2007

Authors:

Geum Chan Hwang, Junichi Matsushita, Jae Jeong Lee

Keywords:

Boron Carbide, Composite, Silicon Boride, Vickers Hardness

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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