Affiliation:
1. Northwestern Polytechnical University
Abstract
The Ti6Al4V composites reinforced with Chinese SiC fiber was manufactured and then
thermally exposed at 800°C, 900°C and 1000°C, respectively, for up to 500h. The interfacial reaction
products were identified as TiC between Ti6Al4V and the C-coating of the SiC fiber. However, if the
SiC fiber has no C-coating, the interfacial reaction forms TiC, Ti3SiC2, Ti5Si3(Cx) and Ti3Si(Cx). The
thickness of the interfacial reaction zone was measured and it is found that the thickening rate is
slower in the samples in which the SiC fiber has the C-coating. The growth of the interfacial reaction
products is diffusion-controlled and the parameters of the growth kinetics, k0 and Q, were determined,
respectively. The profile of the element distribution was calculated according to the diffusion theory
and is well consistent with the expeimental data.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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