Validity of powder metallurgy-based method for processing carbon fibers reinforced titanium matrix composites

摘要

Titanium matrix composites reinforced by continuous carbon fibers were prepared using powder metallurgy (PM) and hot compression. The study of fiber-matrix interfaces has shown that direct coupling between carbon and titanium is possible without interposing any diffusion barrier, provided compression temperatures are lower than 700°C. However, high pressures of about 200 MPa for 1 h must be applied. The validity of the used PM-based processing method has been discussed and some discrepancy between expected and measured mechanical performance has been justified, which enables directions for processing improvement to be proposed.