Affiliation:
1. Northwestern Polytechnical University
Abstract
Internal friction of 2D C/SiC composites fabricated by chemical vapor infiltration (CVI)
method was measured by dynamical mechanical analysis (DMA) at different frequencies from room
temperature (RT) to 400°C in air atmosphere. Internal friction of 2D C/SiC composites increased
gradually with increasing temperature and then decreased after damping peak appeared in the
temperature range of 250°C to 300°C. Damping capacity and peak value decreased gradually with
increasing frequency, accompanied with a shift of damping peak towards lower temperatures.
Moreover, the effect of interphase thickness on damping behavior of 2D C/SiC composites was
investigated. The results showed that damping peak of the composites increased gradually and the
temperature of the peak shifted to the lower temperature with increasing PyC interphase thickness,
when the interphase thickness is in the range of 90~296nm. The influence of interphase thickness on
interfacial bonding strength, sliding resistance and the microstructure of SiC matrix was discussed,
which was considered to be responsible for the results.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
14 articles.
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